K X-ray gamma-ray directional correlation in the decay of 114Inm with a sum-peak-coincidence scintillation spectrometer

1970 ◽  
Vol 48 (12) ◽  
pp. 1514-1517 ◽  
Author(s):  
D. S. Murty ◽  
K. V. Ramana Rao ◽  
P. Jagam ◽  
V. Lakshminarayana
Keyword(s):  
Electron Capture ◽  
Gamma Ray ◽  
Electron Capture Decay ◽  
X Ray

The evidence obtained for the existence of the K X-ray gamma-ray directional correlation by Perepelkin against the predictions of the theory of Dolginov evoked considerable interest in this field. The electron capture decay of 114Inm is used to advantage in the present investigation with a sum-peak-coincidence scintillation spectrometer. The results obtained are consistent with the theory of Dolginov.

On the gamma-ray transitions following the electron capture decay of Tb155

1962 ◽  
Vol 55 (3) ◽  
pp. 174-177 ◽  
Author(s):  
B. N. Subba Rao
Keyword(s):  
Electron Capture ◽  
Gamma Ray ◽  
Electron Capture Decay

x-ray intensity ratios in 3d elements by photoionization and electron-capture decay

2000 ◽  
pp. 139-151 ◽  
Author(s):  
Takeshi Mukoyama ◽  
Kazuo Taniguchi ◽  
Hirohiko Adachi
Keyword(s):  
Electron Capture ◽  
Electron Capture Decay ◽  
X Ray ◽  
3D Elements ◽  
Intensity Ratios

In Vivo Analysis of Lipid-Protein Ratios in Human Muscle by Differential X-Ray Absorption Using 109Cd Photons

1972 ◽  
Vol 16 ◽  
pp. 111-123 ◽  
Author(s):  
Luther E. Preuss ◽  
Frank P. Bolin
Keyword(s):  
Gamma Ray ◽  
Lipid Extraction ◽  
Ether Lipid ◽  
Spectroscopic Techniques ◽  
Standard Samples ◽  
Muscle Area ◽  
Electron Capture Decay ◽  
Transmitted Radiation ◽  
X Ray

AbstractTissue's two major components: lipid and protein, are of a primary importance, related as they are to the normal life states. Assay of protein and lipid (fat and lean) in vivo is of certain criticality in human disease states, such as wasting, edema, obesity and other dyscrasias involving body mass and fat-lean balance. Since the elemental composition of lipid and protein molecules differ in a significant and regular fashion, their mass absorption coefficients differ when radiation in the x-ray and lower energy gamma ray region is used. Two monochromatic photons, one in the 20 to 30 keV region, another in the 60 to 100 keV region, can be shown to exhibit an absorption ratio in a two component system of fat and lean which provides for a determination of the component mass ratios. Photons from x-ray machines and isotopic x- and gamma ray sources have been proposed for this. The radionuclide offers qualities of stability, small size and weight, portability, zero power consumption and, generally, a certain economy. The electron capture decay of 109Cd provides a gamma ray at 88 kilovolts and a daughter (Ag) Kα doublet at 22 keV. This fortuitous energy combination is advantageous in this differential absorptiometry. The 109Cd source provides for a stable geometry and calls for the simultaneous measurement of both photons by non-dispersive x-ray spectroscopic techniques. Ten mCi of 109Cd was incorporated into a sealed source, filtered for the silver Kβ1 x-ray (at 24. 942 keV) with 0. 1 mm palladium and collimated with a grazing aperture arrangement. Fat-lean tissue simulating standard samples three cm to ten cm in length and of various component ratios were studied. Component weight percent was determined using a function of the transmitted radiation. Determinations on water (the lean simulator) and polyethylene (the fat Simulator) as well as other materials produced absorption ratios concurring favorably with the known make-up of the Simulators.In vitro dual beam analysis of muscle tissue samples showed a high degree of correlation with the results of ether lipid extractions. Using lipid extraction values as the standard, the x-ray absorptiometric technique produced percentage lipid levels averaging within 0. 5% of the extractions.In vivo measurements of fat content of the triceps muscle area were compared with skinfold thickness measurements of the same area. Coefficient of correlation was 0. 88.

The decay of 144Pm

1968 ◽  
Vol 46 (19) ◽  
pp. 2181-2187 ◽  
Author(s):  
S. Santhanam
Keyword(s):  
Excited State ◽  
Electron Capture ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Energy Levels ◽  
The State ◽  
Electron Capture Decay ◽  
First Excited State ◽  
Crossover Transition

In the electron-capture decay of 144Pm prepared by (p, 2n) reaction on enriched 145Nd, it is shown that, in addition to the well-known energy levels at 696, 1313, and 1789 keV, two new levels exist, one at 2093 keV, and another at 1509 keV. The state at 2093 keV deexcites with the emission of a 304-keV gamma ray to the 6+ level at 1789 keV, and by a crossover transition to the 4+ level at 1313 keV with the emission of a 780-keV gamma ray. The level at 1509 keV leads to the first excited state (2+) at 696 keV with the emission of a gamma ray of energy 813 keV. The intensities of the 780-, 304-, and 813-keV gamma rays are, respectively, 1.5, ≈ 0.1, and 0.5% of that of the 696-keV gamma ray.

K shell X-ray intensity ratios and vacancy transfer probabilities of Fe, Ag, and Te following electron capture decay

2014 ◽  
Vol 92 (11) ◽  
pp. 1301-1304 ◽  
Author(s):  
Linu George ◽  
S.B. Gudennavar ◽  
Daisy Joseph ◽  
S.G. Bubbly
Keyword(s):  
Electron Capture ◽  
Intensity Ratio ◽  
Exchange Interactions ◽  
Neutrino Emission ◽  
Recoil Effect ◽  
Electron Capture Decay ◽  
Simple Method ◽  
X Ray ◽  
Intensity Ratios ◽  
Experimental Values

The K shell X-ray photons of Fe, Ag, and Te following the electron capture decay of Co57, Cd109, and I125, respectively, were detected using Si(Li) detector coupled to PC-based 8k multichannel analyzer employing a simple method suggested earlier by our group. The calculated K shell X-ray intensity ratios and vacancy transfer probabilities for these elements are compared with the theoretical values predicted by Scofield and with others’ experimental values obtained via photoionization. It is found that the Κβ to Κα X-ray intensity ratio of Fe is lower by 4.0%, while that of Ag and Te are greater by 7.9% and 19.1%, respectively, from the theoretical values. These deviations may be attributed to the exchange interactions occurring between the 3p–3d shell electrons as well as the recoil effect of the nucleus due to neutrino emission.

scholarly journals Analysis of Chemical State by Means of X-Ray Spectra Induced by Electron Capture Decay.

RADIOISOTOPES ◽  
1996 ◽  
Vol 45 (12) ◽  
pp. 823-824
Author(s):  
YOICHI TAMAKI
Keyword(s):  
Electron Capture ◽  
Chemical State ◽  
Electron Capture Decay ◽  
X Ray

FLASH X-RAY DEVICES FOR PUMPING NUCLEAR MATERIALS DEVELOPED IN THE GAMMA-RAY LASER PROGRAM AT TEXAS

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-367-C9-370
Author(s):  
C. B. COLLINS ◽  
F. DAVANLOO ◽  
T. S. BOWEN ◽  
J. J. COOGAN
Keyword(s):  
Gamma Ray ◽  
Nuclear Materials ◽  
X Ray
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