... NUCLEAR SCATTERING), (*COMPTON SCATTERING, GAMMA RAYS), ABSORPTION, PHOTOELECTRIC EFFECT, SHIELDING, NUCLEAR ...
DTIC Science & Technology
The Brazilian natural pink tourmaline is studied through the polarized optical absorption measurements. The effect of increasing doses of gamma -rays from sup 60 Co in the spectra were determined (maximum of 20MGy). The following optical absorption bands ...
National Technical Information Service (NTIS)
... INDICATE THAT THE DECAY SCHEME OF Re-188 is not ... SPECTROSCOPY, GAMMA RAY SPECTROSCOPY, GAMMA RAYS, GOLD, HALF LIFE ...
... Accession Number : ADA462290. Title : Gamma-Ray Instrument for Polarimetry, Spectroscopy and Imaging (GIPSI). Corporate ...
It is important to minimize the background for gamma ray remote sensing experiments. It becomes more important with the advent of high-resolution gamma ray spectroscopy, as one wishes to study smaller regions and lower elemental concentrations. Here, we describe our procedure to minimize the ...
NASA Astrophysics Data System (ADS)
confirmed by the JPL high-resolution gamma ray spectrom- ... Figure (opposite page): Components of the high resolution gamma ray spectrometer used ...
NASA Website
Applications of total absorption {gamma}-ray spectroscopy and its combination with high-resolution nuclear spectroscopy methods for measurements of a {beta}-decay strength function S{sub {beta}}(E), determination of the total {beta}-decay energy Q{sub {beta}}, and testing of decay-scheme completeness are presented.
Energy Citations Database
... DEUTERIUM, DEUTERON BOMBARDMENT, GAMMA RAY SPECTROSCOPY, GEOPHYSICAL PROSPECTING, INSTRUMENTATION, NEUTRON ...
A device has been built, based on a nuclear analog to Raman spectroscopy, which monitors the gamma ray absorption cross section of nuclei in an Fe foil as a function of the frequency of an Rf magnetic field in which the foil is placed.
Contents: The origin of Gamma rays; Gamma-ray interactions with matter; Gamma-ray detectors; Instrumentation for Gamma-ray spectroscopy; General topics in passive Gamma-ray assay; Attenuation correction procedures; The measurement of Uranium enrichment; P...
High Resolution Gamma-Ray Spectroscopy with Silicon Photomultipliers. Printer- friendly version. Author Names and Affiliations. First Name: Richard ...
... Accession Number : AD0708049. Title : HIGH-RESOLUTION GAMMA-RAY SPECTROSCOPY STUDY. Descriptive Note ...
... Accession Number : AD0698558. Title : HIGH-RESOLUTION GAMMA-RAY SPECTROSCOPY STUDY. Descriptive Note : Annual rept.,. ...
A method of non-destructive determination of vegetation density in place is presented. This method utilizes a gamma ray absorption technique. The 122 keV gamma rays from Cobalt-57 were used for this work. The determinations are made using the principle of...
Chemical compositions of the surfaces of the moon and certain planetary bodies can be determined by orbital gamma -ray spectroscopy. The major sources of gamma -ray lines (and of radionuclides) in the moon are the decay of the primordial radioelements (U,...
A total absorption NaI(Tl) gamma spectrometer has been assembled and tested over the range 0 to 10 Mev with thermal neutron capture gamma rays. It employs an 8-in. diam by 12-in. NaI(Tl) anticoincidence mantel. The measured width at 8.5 Mev is 3% (full width at half-maximum). Typical spectra are presented. Measurements of ...
... GAMMA RAY ABSORPTION COEFFICIENTS, POSITION(LOCATION), RADIATION, DETECTION, DECONTAMINATION, REMOTE CONTROL ...
Nov 8, 1996 ... J.J. Brainerd: The Compton Attenuation Model of Cosmological Gamma-Ray Bursts. E.P. Liang: A Cold Absorption Model of Gamma Ray Burst ...
... Gamma-ray dose rates were obtained by ... found that the beta-ray absorption curve could ... Laboratory determination of effective gamma-ray energies ...
... EQUIPMENT, *NUCLEAR RADIATION SPECTROMETERS, *GAMMA RAY SPECTROSCOPY, WATER, PRESSURE GAGES, TEMPERATURE ...
... Descriptors : *SOILS, *CONSTRUCTION MATERIALS, GAMMA RAY SPECTROSCOPY, IDENTIFICATION, SOIL MECHANICS, RADIOACTIVE ...
... BEAMS, BREMSSTRAHLUNG, GAMMA RAY SPECTROSCOPY, PARTICLE ACCELERATOR COMPONENTS, LINEAR ACCELERATORS. ...
Abstract: High resolution gamma-ray spectroscopy is a relatively new field ... When the high resolution gamma-ray spectrometer (GRSE) was removed from the ...
HIGH-RESOLUTION GAMMA-RAY SPECTROSCOPY IN SUPPORT OF PASO. Fundamental Question: B How are particles accelerated and transported at the Sun and what is ...
... ii- comprehensive technical report covering all of the technique of focusing curved crystal spectrometry of short wavelength gamma-rays had been ...
... Report Date : JAN 1968. ... of the gamma ray spectra have been obtained for five arbitrarily chosen metals - aluminum, copper, iron, nickel, and zinc. ...
A major difficulty in medium energy gamma-ray remote sensing spectroscopy and astronomy measurements
NASA Technical Reports Server (NTRS)
Spectrometer Permits High-Resolution Gamma Ray Spectroscopy. Sample. Collimator. The problem: To perform high-resolution gamma-ray spectro- ...
Gamma ray production processes are reviewed, including Compton scattering, synchrotron radiation, bremsstrahlung interactions, meson decay, nucleon-antinucleon annihilations, and pion production. Gamma ray absorption mechanisms through interactions with r...
A natural gamma ray logging system utilizes gamma ray spectroscopy to measure thorium, uranium and potassium content of earth formations adjacent a well borehole. An additional measurement is also taken from which compensation for borehole effects on the measurements of interest is achieved.
Compton recoil gamma-ray spectroscopy provides absolute measurements of continuous gamma-ray spectra. Peaks which possess sufficient intensity above the continuum level can be observed. Since the inception of this spectrometric method, this method has evo...
The gamma rays most commonly used for energy calibration in gamma spectroscopy are given. Gamma energy and half life are given for 20 sources. In the case of complex decays only the most intense gamma rays are given. (M.C.G.)
This report briefly describes our studies of various materials at high pressures by means of x-ray and {gamma}-ray absorption spectroscopy. High pressure provides a very effective means of studying materials. Virtually every property is altered from the color and crystal structure to the electrical and magnetic properties. The fundamental reason, of ...
DOE Information Bridge
... Accession Number : AD0191532. Title : ABSORPTION BY CONCRETE OF X-RAYS AND GAMMA RAYS. Corporate Author : ...
One of the primary analytical techniques for the determination of radionuclides is high-resolution gamma-ray spectroscopy. The system used by the Analytical Chemistry Laboratory of Bendix Field Engineering Corporation (Bendix) in support of the U.S. Department of Energy Grand Junction Area Office consists of four Ge(Li) detectors operated under computer ...
Petroleum well logging using neutron borehole accelerators is reviewed. Since the introduction of the borehole neutron accelerator in 1959, several generations of logging instruments have been developed. These tools measure neutron lifetime, neutron activation based on half life and radiation intensity of the activation products, and capture gamma ...
A knowledge of the {beta}-strength distribution in nuclei is both of fundamental character and great importance in related fields. Despite intrinsic difficulties, the measurement of this quantity from the subsequent electro-magnetic de-excitation is in most cases the only possible method. In this case and for nuclei far from stability, total absorption ...
In x-ray and gamma-ray spectroscopy, it is desirable to have detectors with high energy resolution and high absorption efficiency. At LLNL, we have developed superconducting tunnel junction-based single photon x-ray detectors with thin film absorbers that...
The program and abstracts of papers are presented. Topics include radiation sources, radiation detectors, mathematical models and data analysis, gamma-ray spectroscopy, instrumentation, applications of x-ray fluorescence, PIXE, and x-ray absorption. (ACR)
Zhang, Student Member, IEEE Abstract--When a polarized gamma ray photon undergoes a Compton scatter of incident gamma rays. Index Terms--Compton scattering, Gamma-ray polarization 3-D position sensitive Cd these interactions, i.e., photoelectrons in pho- toelectric ...
E-print Network
The radiation resistance of organic electro-optic and optoelectronic materials for space applications is receiving increased attention. An earlier investigation reported that guest-host poled polymer EO modulator devices composed of a phenyltetraene bridge-type chromophore in amorphous polycarbonate (CLD/APC) did not exhibit a decrease in EO response (i.e., an increase in modulation-switching ...
The Tradescantia (flowering plant) experiment packages are constructed of polypropylene plastic to minimize absorption and scattering of the gamma rays from ...
The spectra of prompt gamma rays emitted following nuclear pion absorption were studied to determine
... Descriptors : , ABSORPTION COEFFICIENTS, ACCUMULATION, ACCURACY, ATOMIC PROPERTIES, DENSITY, ENERGY, INTERVALS, MEAN ...
Nuclei can carry angular momentum by single-particle alignments and by collective motion, as has been well illustrated in discrete-line spectroscopy. From continuum gamma -ray studies in still higher spin regions, it appears that these modes both continue...
The basic objective of the program is to study methods by which nuclear debris measurements can be made more extensive and interpretable through utilization of important new advances in high-resolution gamma-ray spectroscopy. The program focussed on two p...
Sealed {sup 252}Cf sources in the microCurie to milliCurie range are routinely used in industry and research. At present, no reliable analytical method is available for precise determination of the activity. Very strong sources can be analyzed by neutron counting but the error is large. The authors propose to use gamma-ray spectroscopy for such analysis. ...
... GAMMA EMISSION, GAMMA RAY SPECTROSCOPY, SEMICONDUCTOR DEVICES, COHERENT SCATTERING, INCOHERENT SCATTERING. ...
... Descriptors : *NUCLEAR PHYSICS, *SCIENTIFIC RESEARCH, ATOMIC SPECTROSCOPY, BIBLIOGRAPHIES, FREE RADICALS, GAMMA RAYS ...
... strong radiation in the ultraviolet, X-ray and gamma ray regions of the ... high resolution sources would revolutionize spectroscopy in this region of the ...
