... DEFORMATIONS ON THE RADAR CROSS SECTIONS OF AIRCRAFi ... ability to accurately predict the radar cross section (RCS) of those aircraft in a ...

The total differential cross sections for AlHC1 are measured. A coupled state calculation was performed to find a potential surface to reproduce the measured data. (AIP)

... One finds that for cross sections with holes certain ... made, because for a cross section with holes ... A third modification serves to remove a degeneracy ...

Using a population-based sample of 263 individuals ranging from 6 to 89 years of age, we investigated the gains and losses in the abilities to (a) use exogenous cues to shift attention covertly and (b) ignore conflicting information across the life span. The participants' ability to shift visual attention was tested by a typical Posner-type orienting task ...

Individual time preference determines schooling enrolment. Moreover, smoking behavior in early ages has been shown to be highly related to time preference rates. Insofar as discount rates are uncorrelated to ability, predicting school enrolment by discount rates can get rid of the ability bias in an earnings regression. Accordingly, we use smoking at age ...

Conflicting findings on the correlations between fission cross section and target-nucleus spin for several nuclei, viz., a large cross section corresponding to a high spin, prompted the authors to verify such a correlation by repeating the measurement of the familiar fission ...

X-band measurements of radar cross section as a function of the angle between insect body axis and the plane of polarization are presented. A finding of particular interest is that in larger insects, maximum cross section occurs when the E-vector is perpendicular to the body axis. A new range ...

We study the production cross section of a highly excited string with fixed angular momentum from an ultrahigh energy collision of two light strings. We find that the cross section exhibits geometric behavior in a certain region of angular-momentum/impact-parameter space. This geometric ...

We use a Good-Walker model for diffraction to study the high-energy behavior of the diffractive cross sections in the minijet model. We find that the high-energy behavior of the diffractive cross section, like the elastic cross section, is determined by ...

Our ability to compute the electromagnetic scattering, absorption, and extinction cross sections of randomly oriented electrically conducting thin fibrous particles has improved substantially over the past five years or so. Electronic Properties of Metals...

... view and cross-section plotting ... SURVEYS, CONFIGURATIONS, CROSS SECTIONS, COMPUTER ... FINDING, COMPUTER PROGRAMS, REMOVAL. ...

The question of the existence of the soft-photon expansion and its connection with the derivation of the soft-photon theorem is studied. We find that the soft-phonon expansion does not necessarily exist for all possible bremsstrahlung cross sections, and if such an expansion does not exist for some types of cross ...

... and find errors in its use of the physical concept of cross section and its neglect of the radiobiological relationship between target size and radiosensitivity in evaluating the radiation damage to �point...

Using a semiempirical nuclear fragmentation model developed at NASA Langley Research Center (NUCFRG2), we analyze one nucleon removal cross sections in terms of nuclear and coulomb cross sections. We find there is a need for structure effects in light and medium nuclei. The interesting cases of ...

In our recent studies, an empirical barrier distribution was proposed for a unified description of the fusion cross sections of light and medium-heavy fusion systems, the capture cross sections of the reactions leading to superheavy nuclei, and the large-angle quasi-elastic scattering cross ...

We have calculated, independently, the {sup 1}S singly differential cross section for the electron-impact ionization of hydrogen at an incident energy of 4.0 eV above threshold using two different methods: time-dependent close coupling and exterior complex scaling. The absolute value of the {sup 1}S cross section ...

The present research investigates how mental visualization of a 3D object from 2D cross sectional images is influenced by displacing the images from the source object, as is customary in medical imaging. Three experiments were conducted to assess people�s ability to integrate spatial information over a series of ...

The present research investigates how mental visualization of a 3D object from 2D cross sectional images is influenced by displacing the images from the source object, as is customary in medical imaging. Three experiments were conducted to assess people's ability to integrate spatial information over a series of ...

... The time transfer system's ability to resolve sub ... Data will be transferred daily for transmission to ... Figure 4 Cross section of Hydrogen Maser Oscillator ...

This study examines the impact of fluctuations in entry-level labor market conditions on the graduate school enrollment decisions of newly minted undergraduate degree holders. Using repeated cross-section data for recently graduated science and engineering undergraduates from the National Survey of Recent College Graduates, and state-level unemployment rates to measure ...

The power of the McCumber theory [D. E. McCumber, Phys. Rev. 136 , A954-957 (1964)] consists in its ability to accurately predict emission cross section spectra from measured absorption, and vice versa, including both absolute values and spectral shapes. While several other theories only allow the determination of integrated ...

Optical imaging using independent component analysis (OPTICA) is enhanced to provide a high resolution cross section imaging of objects in a turbid medium by a backprojection technique. The performance is demonstrated by imaging a human breast model made of ex vivo human breast tissues. Cancerous site of 5mm size is detected at the midplane of the 33mm ...

We have measured the cross section for nuclear charge pickup by relativistic holmium on several targets of larger atomic number than have been studied previously. We find that although measurements made with most of the targets are consistent with a peripheral geometric scaling, one target, silver, shows an anomalously high ...

The cross section for two-neutron removal from a beam of relativistic {sup 11}Li is calculated in an eikonal approximation. We find a larger nuclear cross section in reactions with heavy nuclei than estimated by Kobayashi {ital et} {ital al}. This lowers the inferred Coulomb ...

We study the Casimir force acting on a conducting piston with arbitrary cross section. We find the exact solution for a rectangular cross section and the first three terms in the asymptotic expansion for small height to width ratio when the cross ...

We study the Casimir force acting on a conducting piston with arbitrary cross section. We find the exact solution for a rectangular cross section and the first three terms in the asymptotic expansion for small height to width ratio when the cross ...

An interesting variety of pipe cross-sectional shapes can be generated, for which the Navier-Stokes equations can be solved exactly. The simplest cases include the known solutions for elliptical and equilateral triangle cross-sections. Students can find pipe cross-sections from solutions of Laplace's equation in ...

We calculated the inelastic electron impact excitation cross sections of He+ by electrons for a model helium atom to examine the onset of the signature of quantum chaotic scattering in this simple system. We find Ericson fluctuations (EF) in the calculated inelastic scattering cross sections ...

We calculated the inelastic electron impact excitation cross sections of He^+ by electrons for a model helium atom to examine the onset of the signature of quantum chaotic scattering in this simple system. We find Ericson fluctuations (EF) in the calculated inelastic scattering cross sections ...

An attempt was made to find anomalies in the energy , dependence of cross sections for two-particle scattering in the vicinity of the thresholds for pair production of pions in proton-proton collisions. A differential ionization chamber was used to record the protons. The magnitude of the relative deviation of the ...

We have measured the cross section for depolarization of the 5/sup 2/P/sub 1/2/ state of silver atoms by collisions with helium atoms using the Hanle-effect technique. We find the nuclear-spin-independent cross section to be sigma = 1.2 +- 0.15 x 10/sup -16/ cm/sup 2/, significantly smaller ...

Unitarity of the close-coupling formalism ensures that the total ionization cross section converges much faster than its individual l-components (Bray 1994 Phys. Rev. Lett. 73 1088). However, convergence in the latter is required when obtaining differential cross sections. This can be computationally difficult ...

The experiment DIRAC at CERN aims to measure the lifetime of relativistic ?+?- atoms (pionium) with an accuracy of 10%, requiring cross sections for the interaction of pionium with the target material with an accuracy of 1% as theoretical input. We calculate the excitation cross sections for the Coulomb interaction ...

The total cross sections of the reactions DDp, DDn, TD at 10 kev to 10 Mev are estimated from a review of the experimental data up to January 1951. Maxwell averages for DDp and TD computed from thesc estimates are given, together with some fitted analytic expressions provided for machine use. A collection of the identificable earlier estimates ...

We have carried out coupled-channels calculations of the compound-nuclear formation cross sections on the ground and first-excited states of several nuclei with differing K-values for the ground-state band (^233U, K=52; ^238U, K=0; and ^239Pu, K=1 2). The compound formation cross section, which is the weighted sum ...

We have in earlier papers presented an extension of Mueller�s dipole cascade model, which includes sub-leading effects from energy conservation and running coupling as well as color-suppressed saturation effects from pomeron loops via a �dipole swing�. The model was applied to the description of the total and diffractive cross sections in pp and ? * ...

The nucleon-nucleus and nucleus-nucleus total reaction cross sections are of importance in many different fields, both for a better theoretical understanding as well as for a number of applications, including space radiation dosimetry. We have performed a comprehensive literature study in order to find all available experimental data ...

Incidentally this is the same nonlinear Poisson equation that describes full order Stokes flow of a nonlinear fluid through a glacier's cross section with ...

May 14, 2008 ... Dear SOHO Recovery Team member,. Attached please find a cross section of the numerous e-mails we have received from the solar community ...

The results of the search for superheavy elements are negative with respect to the finding of such elements. However, by assuming 2 spontaneous fission events as the lower limit of detection, the limits to their formation cross sections are calculated and...

individuals find information at the NLM. Digitally photographed cross sections of the human body enabling a virtual body tour. Single DVD disc navigation of digital video,...

This demo illustrates the use of the method of cross sections to find estimates of the volume of physical objects. The examples in this demo, an oddly shaped wine bottle and a sea worm, are not solids of revolution.

The shape and magnitude of the photoneutron cross sections for Cu, Pr, Pb, and Bi are compared to find out a systematic discrepancy between the cross sections obtained using the NBS P2 chamber as a bremsstrahlung beam monitor and those obtained by other experimental techniques such as the ...

The validity of the surrogate ratio method for determining (n,f) cross sections for actinide nuclei is examined. This method relates the ratio of two compound-nucleus reaction cross sections to a ratio of coincidence events from two measurements in which the same compound nuclei are formed via a direct reaction. ...

The validity of the Surrogate Ratio method for determining (n,f) cross sections for actinide nuclei is examined. This method relates the ratio of two compound-nucleus reaction cross sections to a ratio of coincidence events from two measurements in which the same compound nuclei are formed via a direct reaction. ...

We study the transverse flow throughout the mass range from $^{20}Ne+^{20}Ne$ to $^{131}Xe+^{131}Xe$ as a function of the impact parameter. We find that at smaller impact parameters the flow is negative while going through the impact parameter, transverse flow vanishes at a particular colliding geometry named GVF. We find that the mass dependence of GVF is ...

We use education reforms implemented in Tanzania in the 1960s as a source of exogenous variation in education to estimate the returns to education in nationally representative cross sectional datasets from 2001 and 2006. We find that returns to an extra year of education are between 8 % and 13 % when using OLS. The education reform ...

... CALCULATION OF THE CROSS SECTION OF ELECTRON ... The electron excitation cross sections of the ... approximation used to remove the angular ...

The expected production rates at RIA imply it should be possible to collect 10-{micro}g of a one-day half-life isotope. The amount of material should be sufficient to enable direct neutron cross-section measurements for many unstable isotopes. This capability is crucial for many of the stockpile stewardship and some of the astrophysical cross-section ...

The ability to know with precision the depth-dose, dose average LET, fluence and energy distributions is of great importance in many research fileds, including therapeutic and diagnostic medicine when using heavy ion beams, as well as in space research. We have therefore developed a model and a computer code for calculating these distributions when using high energy proton or ...

The association between working hours and work ability was examined in a cross sectional study of male (N=156) and female (N=1092) nurses in three public hospitals. Working hours were considered in terms of their professional and domestic hours per week and their combined impact; total work load. Logistic regression analysis showed a ...

The D0 experiment began accumulating data at the Fermilab Tevatron in May of 1992. Protons are collided with antiprotons at [radical]s = 1.8 TeV and an expected peak luminosity of 5 x 10[sup 30] cm[sup [minus]2] sec [sup [minus]1]. The D0 detector is an all-purpose detector that will have exceptional jet reconstruction capabilities derived from superior calorimetry and nearly 4[pi] angular ...

The D0 experiment began accumulating data at the Fermilab Tevatron in May of 1992. Protons are collided with antiprotons at {radical}s = 1.8 TeV and an expected peak luminosity of 5 {times} 10{sup 30} cm{sup {minus}2} sec{sup {minus}1}. The D0 detector is an all-purpose detector that will have exceptional jet reconstruction capabilities derived from superior calorimetry and nearly 4{pi} angular ...

The optical potential for the pion-C/sup 12/ interaction at 60 to 150 Mev is calculated in impulse approximation using the full energy dependence of the pi -nucleon phase shifts. A critical discussion of the comparison with experimental well depths and differential cross sections is given. It is concluded that the model is perfectly adequate for ...

A brief review is given of some recent developments in the fields of optical model potentials; level densities; and statistical model, precompound, and direct reaction codes and calculations. Significant developments have occurred in all of these fields since the 1977 Conference on Neutron Cross Sections, which will greatly enhance the ...

MC**2-2 solves the neutron slowing-down equations using basic neutron data derived from ENDF/B data files to determine spectra for use in generating multigroup neutron cross sections. The current edition includes the ability to treat all ENDF/B-V represen...

We present a study of the Drell-Yan process in pion-proton collisions including next-to-leading-logarithmic threshold-resummed contributions. We analyze rapidity-integrated as well as rapidity-differential cross sections in the kinematic regime relevant for the COMPASS fixed target experiment. We find that resummation leads to a ...

We report the energy-dependent fragmentation cross sections for several of the more likely fragmentation channels for protons with up to 10 keV impact energy colliding with acetylene and ethane. We find that the predominant channels are those which involve the dissociation of a carbon-hydrogen bond, and we find ...

We report cross sections for ionization of He coincident with electron loss from He, Li, C, O, and Ne projectiles. For He, Li, C, and O projectiles, the cross sections were measured directly, while the Ne cross sections were obtained by transforming results for He ...

In this Letter we study a novel effect of a hidden sector coupling to the standard model Higgs boson: an enhancement of the Higgs pair production cross section near threshold due to bound state effects. After summing the ladder contributions of the hidden sector to the effective ggHH coupling, we find the amplitude for gluon-gluon ...

We have made comprehensive measurements of the noble-gas-induced (He, Ne, Ar, Kr, and Xe) broadening cross sections of the Na 3S-nS (3S-nD) transitions, from n=5 to 38 (n=4 to 40). These measurements were made using the trilevel-echo technique and are an extension and refinement of our earlier work. We find that the ...

We perform calculations for the production of {phi} mesons in nuclei at energies just above threshold and study the A dependence of the cross section. We use results for the {phi} self-energy in the medium obtained within a chiral unitary approach. We find a strong A dependence which is tied to the distortion of the incident proton and ...

Close-coupling calculations of cross sections for rotational transitions have been performed using the full static Hartree potential surface plus a local approximation to the exchange interaction. While simpler approximations to the interaction potential are adequate for the total integrated cross section, accurate ...

Using the relativistic quantum molecular dynamics model, we study the influence of multiple scattering on the result of two-pion correlation measurements. The scales of pion spatial distribution are larger at thermal freeze-out than at chemical freeze-out. By varying the value of the parameter of cross section from 0 to 90 mb, we find ...

Hadron-proton total cross sections ?thp and slope parameters bhp from elastic scattering are found to be closely related. If effective radii Ri are defined by bhp=R2h+R2p, we find from the data ?thp=gR2hR2p. This geometric factorization property, which holds for c.m. energies ?s >=15 GeV, is understood within the eikonal approach. ...

Hadron-proton total cross sections ?hpt and slope parameters bhp from elastic scattering are found to be closely related. If effective radii Ri are defined by bhp = Rh2+Rp2, we find from the data ?hpt = g Rp2Rp2. This geometric factorization property which holds for c.m. energies ?s >= 15 GeV is understood within the eikonal ...

The neutron-rich fusion reactions are investigated systematically using the improved isospin dependent quantum molecular dynamics model. By studying the systematic dependence of fusion barrier on neuron excess, we find the enhancement of the fusion cross sections for neutron-rich nuclear reactions that give the lowered static Coulomb ...

We analyze angular momentum effects in heavy-ion-induced fission in terms of the statistical model, including collective effects in the nonadiabatic approach and avoiding all the usual numerical approximations and free parameters but one. We find that the strong increase of the fission probability along with the increasing compound nucleus spin is responsible for several ...

1 Workplace bullying and sleep disturbances: findings from a large scale cross-sectional survey between workplace bullying, and its characteristics, and sleep disturbances in a large sample of employees of the French working population. Design: Workplace bullying, evaluated using the validated instrument developed

Current research supports the strong potential of structural MRI profiles, even within cross-sectional designs, as a promising method for the discrimination of Alzheimer�s Disease (AD) from normal controls and for the prediction of Mild Cognitive Impairment (MCI) progression and conversion to AD. Findings suggest that measures of structural change in ...

PurposeThe aim of this study was to identify the relationship between urinary incontinence (UI) and low back pain (LBP) discomfort and disability, static balance, and demographic factors.MethodsA total of 348 women aged 20-80 years were included in this cross-sectional study. The general characteristics of the subjects and the main outcome (UI condition, LBP discomfort, LBP disability, and static ...

The ?(1S), ?(2S), and ?(3S) production cross sections in proton-proton collisions at s=7TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1�0.3pb-1. Integrated over the rapidity range |y|<2, we find the product of the ?(1S) production ...

We systematically analyze total reaction cross sections of carbon isotopes with N= 6-16 on a {sup 12}C target for wide range of incident energy. The intrinsic structure of the carbon isotope is described by a Slater determinant generated from a phenomenological mean-field potential, which reasonably well reproduces the ground-state properties for most of ...

We present experimental measurements and theoretical calculations for the electron-impact single ionization cross section of Sc{sup +} ions covering an energy range from threshold to 1000 eV. An electron-ion crossed-beams setup was employed for the measurements of absolute cross sections as well as for a ...

The ? production cross section in proton-proton collisions at ?s = 7 TeV is measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1 �0.3 pb-1. Integrated over the rapidity range |y|<2, we find the product of the ?(1S) production cross ...

An accurate knowledge of neutron-induced ?-ray production cross sections is important in enabling the determination of absolute cross sections from relative measurements of ?-ray yields. Such data have a variety of uses, for example, in determining reaction cross sections ...

Experimental results on partial photo-ionization cross sections of helium are analysed in the light of recent advances in the semiclassical theory of two-electron atoms. Byun et al (2007 Phys. Rev. Lett. 98 113001) predict that the total photo-ionization cross section below the double-ionization threshold can, ...

Theoretical study of ? total reaction cross-sections for 50Ti, 52Cr, 54,58Fe, and 58,64Ni nuclei at 100 MeV is presented. Working within the framework of Coulomb modified Glauber model, we calculate ? reaction cross-sections in terms of the phenomenological N-? amplitude using the semi-phenomenological nucleon density distribution proposed by Gambhir and ...

Low energy antiprotons have been used previously to give benchmark data for theories of atomic collisions. Here we present measurements of the cross section for single, nondissociative ionization of molecular hydrogen for impact of antiprotons with kinetic energies in the range 2-11 keV, i.e., in the velocity interval of 0.3-0.65 a.u. We ...

The cross sections for rubidium 52P12?52P32 and cesium 62P12?62P32 excitation transfer due to inert-gas collisions have been measured. The temperature of the collision vessel has been varied from 300�K to 900�K in order to partially establish the velocity dependence of these cross sections (the alkali ...

Using a Halpern-type photoneutron detection system, the photoneutron yields from Li, N/supo 14/, and Ar/sup 40/ were measured as a function of the maximum bremsstrahlung energy from threshold to approximately 50 Mev. The method of Perfold and Deiss was used to extract from the yield curves the total neutron cross section; sigma = sigma ( gamma ...

The differential elastic p-p scattering cross section was measured at 6 GeV/c at the Argonne ZGS in the range P2?=0.6-->1.0 (GeV/c)2 using a polarized target and a polarized beam. We simultaneously measured the polarization of the recoil protons with a well-calibrated carbon target polarimeter. All three polarizations were measured perpendicular to the ...

Absolute cross sections for fragmentation of water molecules by C3+ and O5+ ions over an energy region where the Bragg peak maximizes were measured for ionization, electron capture, and electron loss channels. A collision regime where sigmaSigmaOq+> or =sigmaH2O+ was reached for the first time, producing large abundances of H+ and O+ fragments in ...

A method is formulated for the straightforward evaluation of the Coulomb-Born and Coulomb-Born-Oppenheimer (CBO) cross sections for 1s-2s excitation of hydrogenlike ions by electron impact, without employing partial-wave analysis. The simplicity of the method makes it very economical for the calculation of electron-ion scattering cross ...

This paper reports our theoretical investigations into electron scattering with SO, SO2, SO2Cl2, SO2ClF and SO2F2 in the energy range from the ionization threshold to 2000 eV. The present studies are prompted by the occurrence and applications of these molecular species in atmospheric and astrophysical systems, together with a paucity of data for SO and SO2AB (A, B = Cl, F) species. Complex model ...

A complete set of cross sections is presented for photodouble ionization of He at 0.1 eV above the threshold. Special care is taken to clear the asymmetry parameter and the energy differential cross section of any ionization-excitation contribution. As a result, their limiting behaviors for the fully asymmetric ...

We present exact and estimated quantum differential and integral cross sections as well as product state distributions for the title reaction. We employ a time-dependent wavepacket method including all Coriolis couplings and also an adapted code where the helicity quantum number and with this the Coriolis couplings have been truncated. Results from ...

OBJECTIVE--To quantify the magnitude of the relation between full scale IQ in children aged 5 or more and their body burden of lead. DESIGN--A systematic review of 26 epidemiological studies since 1979: prospective studies of birth cohorts, cross sectional studies of blood lead, and cross sectional studies of tooth ...

... to address the problem of differential diagnosis of vaccine and field strains in Israel. The success of the test is due to our ability to analyze a representative cross-section of MG field isolates, and to...

A comparison is made of results of calculations of pi d elastic scattering cross section using multiple scattering and three-body equations, in relation to their ability to reproduce the experimental data at intermediate energies. It is shown that the two...

The study develops a method of evaluating the ability of public port authorities to finance capital improvements in the near-term future. The method was applied to six specific port organizations, geographically dispersed and representing a cross section ...

We demonstrate the phenomenological potential of the Balitsky-Kovchegov equation with running coupling by showing its ability to accurately describe the combined H1/ZEUS data for DIS reduced cross section.

We consider the cross section limits for light dark matter cadnidates (m=0.4 to 10 GeV). We calculate the interaction of dark matter in the crust above underground dark matter detectors and find that in the intermediate cross section range, the energy loss of dark matter is sufficient to fall ...

A charge-transfer experiment has been done in which Ar[sup 7+] was incident on sodium in the ground state and first excited state. Absolute capture cross sections were determined for projectile velocities in the range of 0.1--1.0 a.u. The experimental findings are compared with the results of semiclassical calculations.

Pu- alpha -Be neutron sources, now available in many college laboratories, used with stilbene crystal detectors and proper circuits for neutron-gamma discrimination, permit students to measure fast-neutron total cross sections for a number of easily obtained samples. From these measurements they may calculate the size of nuclei and, using elements covering ...

In a large region of the supersymmetry parameter space, the annihilation cross section for neutralino dark matter is strongly dependent on the relative velocity of the incoming particles. We explore the consequences of this velocity dependence in the context of indirect detection of dark matter from the galactic center. We find that ...

The author reviews recent experimental results in the search for the quark-gluon plasma. Because the magnitudes of many signals for the plasma are directly proportional to the reaction cross sections, the author examines the corrections to the commonly used lowest-order cross sections. The author ...

The results of the search for superheavy elements are negative with respect to the finding of such elements. However, by assuming 2 spontaneous fission events as the lower limit of detection, the limits to their formation cross sections are calculated and plotted. It is noted that the half-life limits, also shown are easily within the ...

De R�jula has noted that if K or L capture is kinematically forbidden, enhancement of internal bremsstrahlung electron capture (IBEC) can occur. This enhancement may make IBEC useful in measurements of the neutrino mass. It is shown that a similar enhancement occurs for photon-induced electron capture. The cross section for the most promising case, ...

A consistent method of mathematical statistics is proposed for the evaluation of measured data. The variance of the optimum cross section estimation is determined. and calculations are made to find the neutron intensity minimizing this variance for a chosen channel if a time analyzer subject to saturation effect is used. ...

We present results for cross sections summed over partial waves L=0�2 for electron-impact excitation of the 2s and 2p states of He+ in the energy range of 40.84 to 45.66 eV. We find that these cross sections exhibit cusps at the excitation threshold of 40.81 eV.

The eikonal approximation taking into account the post-collisional Stark effect removes the shortcoming of the previous calculations of relative l capture cross sections. We find good agreement between the calculated ?2s and ?2p cross sections and the available experimental data in p+H(1s) ...

Different methods for the calculation of cross sections with many QCD particles are compared. To this end, CSW vertex rules, Berends-Giele recursion and Feynman-diagram based techniques are implemented as well as various methods for the treatment of colours and phase space integration. We find that typically there is only a small ...

The electron impact ionization cross section of Li-like Ba(sup 53+) has been measured at 22 keV using an electron beam ion trap. The measurement makes use of a novel technique, which is discussed in detail. We find a value somewhat higher than predicted b...

The electron impact ionization cross section of Li-like Ba{sup 53+} has been measured at 22 keV using an electron beam ion trap. The measurement makes use of a novel technique, which is discussed in detail. We find a value somewhat higher than predicted by theory.

We calculate nucleon-nucleon cross sections in the nuclear medium with unequal densities of protons and neutrons. We use the Dirac-Brueckner-Hartree-Fock approach together with realistic nucleon-nucleon potentials. We examine the effect of asymmetry in neutron and proton concentrations and find that it can be significant for scattering ...

We calculate nucleon-nucleon cross sections in the nuclear medium with unequal densities of protons and neutrons. We use the Dirac-Brueckner-Hartree-Fock approach together with realistic nucleon-nucleon potentials. We examine the effect of asymmetry in neutron and proton concentrations and find that it can be significant for scattering ...

The mean pulse returned from a random scattering ground can be expressed as an integral where the integrand is a function of the radar cross section. The receiver modifies the returned pulse but under certain conditions the effects due to the ground and the receiver can be interchanged so that it is only neccssary to examine the mean pulse at ...

Opposite side rapidity distributions at large transverse momentum are analysed using different hard collision models: qq implies qq, qantiq implies MantiM, qM implies qM. We find the hard scattering cross section dsigma/dt to be strongly constrained by th...

We present MiniBooNE's preliminary {nu}{sub {mu}} CC1{pi}{sup +} cross section measurement, calculated using the ratio of CC1{pi}{sup +} to CCQE events. We find the inclusive CC1{pi}{sup +} measurement to be below the nuance [1] and NEUGEN [2] expectations.

The purpose of this demo is to illustrate the use of the method of cross sections to find estimates of the volume of physical objects. The objects in this demo are not solids of revolution. The demo presented here utilizes Mathematica. Mathematica 5 notebooks are provided. The notebooks can be modified to approximate volumes of other ...

We investigate the low-frequency absorption cross section of the electromagnetic waves for extreme Reissner-Nordstr�m black holes in higher dimensions. We first construct the exact solutions to the relevant wave equations in the zero-frequency limit. In most cases it is possible to use these solutions to find the transmission ...

Electron-impact ionization cross sections are calculated for the ground and metastable states of C+ . Comparisons between perturbative distorted-wave and nonperturbative time-dependent close-coupling calculations find reductions in the peak direct ionization cross sections due to electron ...

The R-matrix resonance analysis of experimental neutron transmission and cross sections of {sup 233}U, with the Reich-Moore Bayesian code SAMMY, was extended up to the neutron energy of 600 eV by taking advantage of new high resolution neutron transmission and fission cross section measurements performed at the Oak ...

Electron-impact excitation cross sections for several multicharged ions have been measured near threshold using the merged electron-ion beams energy loss (MEIBEL) technique. This technique allows the investigation of optically-allowed and forbidden transitions with sufficient energy resolution, typically about 0.2 eV, to resolve resonance structures in the ...

SectionBuilder is an innovative finite element based tool, developed for analysis and design of composite beam cross-sections. The tool can handle the cross-sections with parametric shapes and arbitrary configurations. It can also handle arbitrary lay-ups for predefined beam cross-section geometries in a consistent manner. The material properties for each ...

It has been proposed to use heavy ion beams with energies around 10 MeV/amu, masses around 200, and average charges of 1+ as a driver for inertial fusion reactor. Current designs require the beams to travel through a region where the background gas pressure is several milli-torr. Thus, it is important to assess the rate at which the charge state of an incident beam evolves while passing through ...

The flux of high energy neutrinos produced in the decay of {sup 8}B is proportional to the {sup 7}Be(p,{gamma}){sup 8}B reaction cross section. Large uncertainties in this cross section limit our ability to test solar models. Direct measurements are underway to reduce the uncertainties to a ...

... Title : The Radar Cross Section of a Two Dimensional ... Descriptors : *LAYERS, *DIELECTRICS, *RADAR CROSS SECTIONS, MATERIALS, RADIUS ...

... for the production of the C triplet Pi ... the peak value of the cross section. ... EXCITATION, DIFFERENTIAL CROSS SECTIONS, MOLECULAR ENERGY ...

... cross section ratios; Elastic scattering cross sections; and ... ENERGY LEVELS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, ELECTROSTATIC ...

... The principally polarized radar cross section is derived by ... Descriptors : *RADAR CROSS SECTIONS, WEDGES, CONICAL BODIES, RADAR ...

... cross sections as seen by remote receivers are of interest. In general, the radar cross section of an object can be determined ...