... Title : ABSOLUTE RAYLEIGH SCATTERING CROSS SECTIONS OF GASES AND FREONS OF STRATOSPHERIC INTEREST IN THE VISIBLE ...

... Title : Absolute Absorption Cross Section Measurements of Ozone and the Temperature Dependence at Four Reference Wavelengths Leading to ...

The procedures and status of the absolute measurement of the neutron capture cross sections for exp 115 In and exp 232 Th are described. Work on the exp 239 Pu fission fragment anisotropy and absolute measurement of the fast neutron fission cross section ...

... of the maximal excitation cross sections of the (2)S- and (2)D- levels upon the principal quantum number and the atomic number was established ...

... Title : High Resolution Absolute Absorption Cross Sections of NO2 at 295, 573, and 673K at Visible Wavelengths: Comprehensive Data Tables. ...

The absolute cross section for photoionization of atomic oxygen from the 2p4 3P ground state of O(0)

... Accession Number : ADA216730. Title : Absolute Cross-Sections for Dissociative Electron Attachment in O2 Condensed on Kr Films. ...

... to-pulse radar cross sections. ... step attenuation values present at the time of measure- ment and calibrated to an absolute cross-section value. ...

Absolute measurements have been made of single electron charge exchange cross ... Charge exchange is an important process in solar and stellar atmospheres, ...

Cometary X-ray Emission Spectra and Absolute Charge-Exchange cross Sections ... Also reported were absolute single, double, and triple charge-exchange cross ...

This thesis deals with experiments on the elastic scattering of Ar, Kr and Xe, using the molecular beam technique. The aim of this work was the measurement of the absolute value of the total cross section and the behaviour of the total cross section, Q, a...

... of the absolute total cross-sections for the ... studies, and a new crossed ion-supersonic ... molecule beams apparatus, designed to remove the thermal ...

Electron collision cross sections for highly reactive CFx (x = 1-3) radicals are required to model technological plasmas. In spite of their importance to industry, experimental studies of electron interactions with CFx radicals are rarely reported in the literature. A new apparatus for measuring absolute elastic differential ...

The partial and total absolute cross sections for the photoionization of Xe+ and Xe2+ ions, respectively, have been measured in the 4d excitation region (50-130 eV). The experimental cross sections are compared with calculated values obtained by the random phase approximation method taking ...

The absolute cross sections for the production of N(+) and N2(+) were measured from the dissociative

An experiment to determine the absolute value of the photo-ionization cross section of atomic oxygen

Laboratory measurements of the relative absorption cross sections of ozone at temperatures 195, 228,

... Electron Impact Ionization I April 1994 ... Quantitative Monitoring of Ammonia and Hydrazines: Absolute Cross Sections for Electron Impact Ionization ...

... Title : Lower Limits on the Absolute Dissociative Electron Attachment Cross Section from O2 Condensed on Rare-Gas Films. ...

An apparatus is described in which merged beams of groundstate Ba(1+) ions and energy-resolved radiation from the Daresbury Synchrotron Radiation Source were used to obtain absolute cross sections for the photoionization of Ba(1+) in the wavelength range ...

Jan 22, 2011 ... Title: Absolute charge exchange cross sections for O^5+, O^6+ and O^7+ collisions with CO and CO2. Authors: Smith, Steven J. Mawhorter, R. ...

Absolute cascade-free excitation cross-sections in an ion have been measured for the resonance 2S to

Jan 22, 2011 ... Title: Absolute Electron Impact Ionization Cross Sections for N₂O and NO from Threshold up to 1000 eV. Authors: Srivastava, S. ...

The boomerang model is used to calculate absolute cross sections near the /sup 2/Pi/sub g/ shape resonance in e-N/sub 2/ scattering. The calculated cross sections are shown to satisfy detailed balancing. The exchange of electrons is taken into account. A parametrized complex-potential curve for ...

integrated total cross section for the Raman backscat- .... Conversion of Frequency Shifts to. Absolute Wavelengths. Band Positions and ...

... The absolute Raman cross-sections of diamond and graphite have been measured, II and it is ... RAMAN SHIFT (cm-1) I ... Frequency Shift (cm-') ...

The Li-Ar absolute total scattering cross section was measured to an accuracy of 1%-2% over the relative velocity range 1 to 4 x 10 to the 5th power cm/sec, corresponding to relative energies of 0.03-0.5eV. The absolute cross section determines the radial...

The fast neutron fission cross section of exp 233 U was measured absolutely between 0.13 and 8.0 MeV. The absolute cross section values were obtained by low geometry alpha counting and isotopic dilution analysis of various exp 233 U samples, 2 pi -detecti...

lute basis by Diven by using the known capture plus fission cross section of U235 ... Cox employed absolute 7-counting and used the U235 fission cross section ...

Quasi-monoenergetic neutron sources of fixed energy can permit generation of absolute cross section data at well-known and isolated neutron energies. These data can serve as independent normalization points for cross section shape measurements made using other techniques. Several examples of ...

Using a crossed electron-molecular beam experiment, featuring a skimmed nozzle beam with pyrolytic radical production, absolute elastic cross sections for electron scattering from the CF2 molecule have been measured. A new technique for placing measured cross sections on an ...

Introduction Absolute D-Hadronic Branching Fractions Results: Branching Fractions and Cross Sections Summary and Outlook D Hadronic Branching Fractions and DD Cross Section at (3770) from CLEO�c V. Cred� Absolute D Hadronic Branching Fractions #12;Introduction ...

In this study, higher order beam elements are developed based on the absolute nodal coordinate formulation. The absolute nodal coordinate formulation is a finite element procedure that was recently proposed for flexible multibody applications. Many different elements based on the absolute nodal coordinate formulation are introduced, ...

Absolute total cross sections for the Ne + Ne, Ar + Ar and O2 + O2 interactions have been measured in the thermal energy range using the crossed nozzle beam technique. The atom-atom total cross section measurements are regarded as sufficiently accurate to...

The absolute absorption cross-section of ozone has been experimentally determined at the temperatures 195, 228, and 295 K at several discrete wavelengths in the 238-335-nm region. The present results for ozone at 295 K are found to be in agreement with those of Hearn (1961). Absolute cross-section measurements of ...

An experiment to determine the absolute value of the photo-ionization cross section of atomic oxygen is described. The atoms are produced in an electrical discharge in oxygen gas with 1% hydrogen added. In order to prevent recombination a crossed beam tec...

The absolute total and one and two electron transfer cross sections for Ar(8+) on Ar were measured as a function of projectile laboratory energy from 0.090 to 0.550 keV/amu. The effective one electron transfer cross section dominates above 0.32 keV/amu, while below this energy, the effective ...

An examination of the standard methods of determining the fission cross section shows that the principle sources of error are uncertainties in the spectrum of the incident neutrons, the energy dependence of the cross sections of the material being studied, the thickness of the fission foil, and the value of ...

The fast neutron fission cross section of /sup 233/U was measured absolutely between 0.13 and 8.0 MeV. The absolute cross section values were obtained by low geometry alpha counting and isotopic dilution analysis of various /sup 233/U samples, 2..pi..-detection of the ...

Fission cross section measurements for a collection of uranium and plutoninm isotopes are presertly being made at LLL by using the 100-MeV electron linear accelerator as a pulsed source for neutrons. The cross sections are measured as a function of neutron energy from 15 MeV down to thermal energy by using ...

Absolute cross sections for simultaneous double ionization and excitation of Ba by electron impact have been measured in a crossed-beam experiment. The lines investigated are at 74.3, 58.7, and 55.5 nm. The vacuum-ultraviolet system was calibrated using a single-ionization chamber. Absolute ...

Monochromatic photons obtained by annihilation in flight of positrons are used to obtain absolute photoneutron cross sections of copper, lanthanum, cerium, tantalum, gold, lead, and bismuth in the "giant resonance" peak. The integrated cross sections are obtained. (auth)

The absolute total and one and two electron transfer cross sections for Ar(sup 8+) on Ar were measured as a function of projectile laboratory energy from 0.090 to 0.550 keV/amu. The effective one electron transfer cross section dominates above 0.32 keV/am...

Absolute partial cross sections have been measured for the electron-impact ionization of the fullerene C{sub 60}. The single parent C{sub 60}+ ionization cross section is the most important ionization channel. Significant cross sections were also ...

In spite of their importance to industry, experimental studies of electron interactions with highly-reactive CFx radicals are seldom reported in the literature. A crossed electron-molecular beam experiment, featuring a skimmed nozzle beam with pyrolytic radical production, has been used to measured absolute cross ...

Cross sections for the (n,2n) reaction were measured at an incident neutron energy of 14.4 plus or minus 0.3 Mev for 27 nuclides. These measurements were made relative to the cross section for the Cu/sup 63/(n,2n)Cu/ sup 62/ reaction. The relative cross sections ...

Absolute cross sections for inclusive electron scattering on H, D, Be, Al and Si have been measured in the kinematical region 0.08(GeV/c) exp 2

Contents: Absolute measurement of signal amplitudes in deep seismic sounding; Plotting the velocity cross section of the earth's crust by computer model matching; Relationship between the seismic wave-field characteristics and the velocity cross-section p...

A weighted sum of all cw spectra gives an OC radar cross section of 0.24 i 0.08 kmz ... radar cross section and absolute magnitude of 17.5 correspond to upper ...

Absolute measurements of the NO absorption cross section in the 440 to 460 nm region at different temperatures are reported. The data cover a range of special interest for remote sensing applications. In order to improve tha accuracy in the determination ...

A general method for determining the branching ratio for an optical transition in neutral atom atomic beams is described. By utilizing the value of the branching ratio obtained, and the lifetime of the upper level, high precision absolute cross sections can be determined.

#12;1 Introduction The measurement of precise photoneutron cross sections requires a complete, which in turn is needed for planned absolute photoneutron cross section measurements over a wide energy

A program has been undertaken to measure absolute electron-ionization cross sections for metals and other materials of low vapor pressure. Equipment necessary to make these measurements, ionizers, Knudsen cells, charged particle traps, and a large quadrup...

This paper reports measurements of absolute cross sections, differential in angle, for scattering of

Experimental studies of associative ionization reactions involving uranium and other metal atoms in collisions with O1O2 and other atmospheric species are described. Absolute reaction cross sections are obtained by comparison with the previously measured ...

An experimental study is presented of the resonant Raman spectra of beta carotene. Absolute differential cross sections are obtained for the most intensive Raman spectral lines with excitation at the absorption maximum. A theoretical analysis is presented...

We present absolute partial electron impact ionization cross sections for ethylene in the electron energy range between threshold and 1000 eV measured with a two sector field double focusing mass spectrometer. Ion kinetic energy distribution functions have been measured at all electron energies by applying a deflection field method. ...

Cross sections have been measured for the production of prompt nuclear $gamma$ rays in the pion bombardment of Al, Ca, V, and $sup 60$Ni. Several disagreements with values in the literature are noted. (AIP)

In the photoneutron laboratory, we have completed a major refurbishing of experimental facilities and begun work on measurements of the capture cross section in thorium and U-238. In the 14 MeV neutron experimental bay, work continues on the measurement o...

An activation technique using coincidences between characteristic X-rays and ?-rays to obtain absolute cross-sections is described. This method is particularly useful in the case of nuclei that decay by electron capture. In addition to the reduction of possible contamination, an improved detection sensitivity is achieved as compared to inclusive ...

In this work, we report an experimental cross-section determination of elastic electron collisions with tetrahydrofuran in the intermediate-energy range. More specifically, absolute differential cross sections are measured and reported in the (50-1000) eV range. The measurements were performed using a ...

Emission spectra between 2800 and 6000 A were observed at the ionic energies from 0.2 to 12 keV. Absolute measurements of emission cross-sections were made for the emission lines coming from Ar(2+) excited states at 4 and 8 keV with a crossed-beam techniq...

The absolute value for the cross-section of dissociative electron attachment (DEA) to thymine obtained from independent crossed beam experiments differ by more than three orders (!) of magnitude with respect to the value derived in an electron transmission spectrometer. We revisit this problem by means of a modified beam experiment ...

Absolute cross sections for the single ionization of Rb/sup +/ ions by electron impact have been measured as a function of electron energy from below threshold to approximately 2000 eV. Measurements were made in a crossed-beam facility having modulated beams. Numerous consistency checks were performed to evaluate ...

The laboratory measurements of absolute Rayleigh scattering cross sections as a function wavelength are reported for gas molecules He, Ne, Ar, N2, H2, O2, CO2, CH4 and for vapors of most commonly used freons CCl2F2, CBrF3, CF4, and CHClf2. These cross sec...

The absolute cross sections for the double, triple, and quadruple ionization of Rb exp + ions by electron impact have been measured from below their respective thresholds to approximately 3000 eV. This determination has been accomplished using a crossed b...

The spectrally resolved absolute fluorescence cross sections of Bacillus globigii (BG) and Bacillus thuringiensis (BT) were measured with a 266nm Nd:YAG laser source. The aerosol samples were prepared in dilute aqueous suspensions for measurement and the absolute cross ...

The absolute photoionization cross sections of I+ and I2+ ions have been measured from 45 to 140 eV, covering the region of 4d ionization where a large maximum, also known as a ``giant resonance,'' occurs in the cross section. For both ions, the maximum cross ...

Electron-impact-ionization cross sections have been measured for the halogen atoms F, Cl, Br, and I from threshold to 200 eV. The absolute accuracy is +- 14%, except for F which is +- 20%. The halogen cross sections have shapes similar to those of the neighboring rare gases but are greater in ...

Absolute integral cross sections for low-energy scattering of neutral sodium clusters Na[sub [ital n

Absolute excitation functions for excited fragments resulting from electron bombardment of H2O, NH3,

... of tadar data fro2 chaff clouds where absolutely everything in time dependent - radar cross section, polarisation ratios, frequency response, Doppler ...

Dec 31, 2008 ... Measurement of Absolute Excitation Cross Sections in Highly-Charged Ions Using Electron Energy Loss and Merged Beams: Chutjian, A., Smith, ...

The absolute integral cross sections for low-energy collisions of neutral sodium clusters Na[sub [ital n

Line emissions are almost entirely from highly-charged ions (HCIs) of C, N, ... A schematic diagram of the JPL Highly-Charged Ion Facility (HCIF) ...

This report discusses the absolute cross-section measurements of photoionization of helium at NSLS, and the future opportunities at the Advanced Photon Source and other third generation synchrotron light sources.

... Abstract : We have developed an octopole-quadrupole photoionization apparatus at the Advanced Light Source for absolute integral cross-section ...

... large quantities of this and other waste propellants requires ... Dye laser wavelength drift was not significant during ... and will aid in the utilization of this ...

... The Chemical Dynamics of State-Selected Atomic and Diatomic Ions of Aerospace Relevance 5a. ... These state-selected absolute total cross section ...

... Opt. Soc. Am., 54:641. 33 Skinner, JG and Nilsen, WG (1968) Absolute Raman Scattering Cross-Section Measurement of ...

Laboratory/. California. Institute of. Technology, under contract with the U.S. Airforce Office of. Scientific Research and the National Aeronautics and Space ...

... mass spectrometer into the high-resolution photoion ... induced dissociation (CID) and charge transfer (CT ... to reject false coincidence ions, we have ...

... absorption cross-section for molecular hydrogen at room temperature was measured absolutely at a resolution of 0.3A, between 1060 and 1130A. ...

... to overcome the heat of fusion of the ... and Characteristics of Stationary Plasma Thrusters with ... JD, "Absolute Cross Sections of Lithium and Other ...

Small-angle neutron scattering techniques have been used to study the angular distribution of the critical scattering from cobalt above T/sub c/. These measurements have been put on an absolute scale by calibrating the critical scattering directly against...

Jan 22, 2011 ... dc.title, Absolute Electron Impact Ionization Cross Sections for N₂O and NO from Threshold up to 1000 eV, en_US ...

Absolute differential and total cross sections for single electron capture of H{sup +} ions impinging on Ar atoms in the energy range of 0.5-5.0 keV and scattering angles from -5.0 deg. to 5.0 deg. are reported. The absolute differential cross (DCS) sections for all ...

The electron excitation function for the metastable states of molecular nitrogen has been analyzed to reveal the excitation cross section for the E /sup 3/..sigma../sub g//sup +/ metastable state of N/sub 2/. This cross section has been placed on an absolute scale by a normalization technique ...

Absolute partial and total cross sections for electron-impact ionization of methanol, ethanol, and 1-propanol are reported for electron energies from threshold to 1000 eV. The product ions are mass analyzed using a time-of-flight mass spectrometer and detected with a position-sensitive detector whose output demonstrates that all ...

The absolute cross sections for the double, triple, and quadruple ionization of Rb/sup +/ ions by electron impact have been measured from below their respective thresholds to approximately 3000 eV. This determination has been accomplished using a crossed-beam facility in which monoenergetic beams of ions and ...

The 6Li(n,t) and 10B(n,?) cross sections are important neutron cross section standards. Precise knowledge of these cross sections is essential because they are often used as reference standards for obtaining the neutron fluence in investigations of the properties of ...

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.

A collinear electron-ion beam technique has been developed for measuring absolute cross sections of electron-ion reactions at low interaction energies. As an example of this technique, absolute recombination cross sections have been measured for diatomic ...

The theory of Gryzinski, the experimentally known ionization energy, and the number of electrons in the shell were used to calculate the absolute ionization cross sections of helium, helium ions, neon, neon ions, argon, mercury, and metastable states of these elements. Curves are presented for calculated and measured ...

Using a method based on the absolute calibration of the density--length product of a supersonic secondary beam in a 20 K cryoexpansion chamber, total cross sections are found for Ar--Ar, Ar--Xe, and Ar--Kr collisions. (AIP)

A combined experimental and theoretical study of 50 eV electron-impact ionization of helium is presented. The absolute coplanar triple differential cross sections (TDCS) are measured for 4 eV and 10 eV slow electrons for fixed scattering angles; -20 deg, ...

Absolute cross sections for pion-induced neutron knockout reactions and some more complex reactions on $sup 14$N, $sup 16$O, $sup 19$F and $sup 31$P were determined by activation at 190 MeV. Results are consistent with existing spallation models as modified by the recent final-state interaction theory of Sternheim and Silbar. ...

The absolute values of photoionization cross sections of atomic oxygen were measured from the ionization threshold to 120 A. An auto-ionizing resonance belonging to the 2S2P4(4P)3P(3Do, 3So) transition was observed at 479.43 A and another line at 389.97 A...

The atom-beam recoil technique was used to measure absolute total cross sections for the scattering of electrons by atomic and molecular oxygen at 22 energies between 0.5 and 11.3 eV, with additional data obtained up to 100 eV. In this method, a modulated...

The absolute cross sections for the single, double, triple and quadruple ionization of Cs exp + ions by electron impact have been measured from below their respective thresholds to approximately 5000 eV. This determination has been accomplshed using a cro...

The absolute dissociative - electron - attachment cross section for O2 condensed on a Kr film is found to be about 20 times larger than that for gaseous O2. This large enhancement is attributed to a downward energy shift (about 0.9 eV) of the O2-(2 Pi sub...

We studied the resonant Raman scattering of x rays in the vicinity of the K absorption edge of silicon. The investigation was carried out at the plane grating monochromator beamline for undulator radiation of the PTB laboratory at BESSY II in Berlin. Cross sections were determined absolutely for a wide energy range of incident photons ...

The atom beam recoil technique was used to measure absolute total cross sections for the scattering of electrons by atomic and molecular oxygen at 22 energies between 0.5 and 11.3 eV, with additional data obtained up to 100 eV. In this method, a modulated...

Absolute measurements have been made of total cross sections for the scattering of electrons by sodium over the electron energy range 0.5-50 eV; some new data for potassium at 10, 20, and 50 eV are also presented. (Modified author abstract)

Absolute measurements have been made of total cross sections for the scattering of electrons by sodium and potassium diatomic molecules, over the electron energy range 0.5-50 eV, at temperatures of 405 and 335C, respectively, using the molecular beam reco...

The absolute cross sections for the single ionization of Ba sup + ions by electron impact have been measured as a function of incident electron energy over the electron energy range from below threshold (10.001 eV) to approximately 1000 eV. It is found th...

Numerical simulations show that derived elemental abundances in astrophysical nebulae can be uncertain by factors of two or more due to atomic data uncertainties alone, and of these uncertainties, absolute photoionization cross sections are the most important. Absolute single photoionization ...

Gamma-ray cross section standards for neutron-induced reactions are important in enabling the accurate determination of absolute cross sections from relative measurements of gamma-ray production. In our work we observed a need for improvement in these standards. In particular there are large ...

Research is reported in measurement of absolute cross sections for the photoionization of heavy rare gas metastable atoms by use of a crossed beams technique. This effort included the development of a high power, pulsed, tunable ultraviolet and vacuum ult...

Absolute partial cross sections from threshold to 1000 eV are reported for the production of Ar{sup {ital n}+} ({ital n}=1--4) by electron-impact ionization of argon. The total cross sections, obtained from an appropriately weighted sum of the partial cross ...

The absolute (e,2e) triply differential cross sections measured in coplanar nonsymmetric conditions are reported for the intermediate 2p orbital of Ar, at an incident energy of 8.4 keV. The data are made absolute by integrating over all ejection directions and comparing with the corresponding doubly differential ...

Updated recommended data for absolute photoionization cross sections of Kr and Xe with uncertainties of {+-} 3 % are presented. The data are the result of a comprehensive analysis of reliable experimental measurements in absolute terms taking preceding recommendations into account. Significant corrections of the ...

In this work, we report an experimental investigation into the interaction of vacuum-ultraviolet radiation with tetrahydrofuran molecules in the gas phase. More specifically, absolute photoabsorption cross sections and photoionization quantum yields are measured and reported in the (11.11-21.45) eV energy range. In addition, ...

The absolute differential cross section for the {sup 2}H({gamma},{ital p}){ital n} reaction has been measured using a large solid angle detector, with a tagged photon beam of mean energy 67 MeV. The data have been compared with nine different theoretical calculations of the cross section, which ...

We present a new method for measuring absolute total electron-impact ionization cross sections. The technique measures fractional loss rates from a magneto-optical trap due to electron-impact ionization. The method requires only relative measurements of the number of target atoms and therefore eliminates a major source of difficulty in ...

The neutron capture cross section 209Bi(n, ?) 210mBi was measured by means of accelerator mass spectrometry (AMS). An absolute measuring procedure based on calibrated ion beam attenuators was applied to overcome the lack of standard samples. Experimental aspects of absolute AMS analyses are described. The capture ...

The absolute differential cross section for elastic p-p scattering was measured for an energy of 0.97 Bev at 6, the unpolarized differential cross- section curve. A total elastic cross-section of (26.8 plus or minus 2.3) mb and a forward scattering ...