Accurate nuclear transition data determined by prompt (n,γ)-spectrometry

2001 ◽  
Vol 50 (2) ◽  
pp. 576-579 ◽  
Author(s):  
A. Paul ◽  
S. Rottger ◽  
A. Zimbal ◽  
U. Keyser
Keyword(s):  
Nuclear Transition ◽  
Γ Spectrometry

Assessment of the volume activity of α-radioactive wastes on surface and specific contamination by portable γ-spectrometry method

2020 ◽  
pp. 468-473
Author(s):  
I. P. Korenkov ◽  
A. I. Ermakov ◽  
A. B. Mayzik ◽  
T. N. Laschenova ◽  
V. N. Klochkov ◽  
...  
Keyword(s):  
Specific Activity ◽  
Experimental Studies ◽  
Germanium Detector ◽  
Low Energy ◽  
Gamma Ray Spectrometry ◽  
Building Structures ◽  
Germanium Detectors ◽  
Volume Activity ◽  
Β Decay ◽  
Γ Spectrometry

The aim of the study is to evaluate the volume activity of radioactive waste (RW) by surface and specific alpha contamination using portable gamma-spectrometry.Materials and methods. Methods of rapid assessment of the content of α-emitting radionuclides in solid waste of various morphologies using gamma-spectrometers based on germanium detectors are considered. Computational methods for determining the effectiveness of radionuclide registration are presented.Results. The possibility of using portable gamma-ray spectrometry to assess the surface and specific activity of various materials contaminated with α-emitters (232Th, 235U, 238U, 237Np, 239Pu, 240Pu and 241Am) is shown. The calculated values of the registration efficiency of low-energy gamma-emitters obtained by modeling the spatial-energy parameters of the detector are given.To simplify the solution of this problem, the calculation program used 20 standard templates of various geometries (rectangular, cylindrical, conical, spherical, etc.). The main sources of error in the survey of contaminated surfaces, largesized equipment and building structures were investigated.Conclusions. The possibilities of portable γ-spectrometry for estimating the volume of RW based on the surface density of contamination of materials with radionuclides of uranium and transuranic elements are investigated. When using γ-spectrometer with a high-purity germanium detector with a range of γ-quanta extended in the low-energy region, radionuclides such as 232Th, 235U,238U, 237Np, 241Am were determined by their own radiation or by the radiation of their daughter products.The “problem” element is plutonium, for rapid evaluation of which it is proposed, in accordance with the radionuclide vector methodology, to use 241Am, which accumulates during the β-decay of 241Pu.According to calculations, the most likely value of the activity ratio 239Pu/241Am for the object where the work was performed (scaling factor) varies in the range from 5.0 to 9.0.Based on the results of calculations and experimental studies, the parameters of the efficiency of registration of various α-emitting radionuclides by portable γ-spectrometers. It has been found that for germanium detectors with an absolute efficiency of registering a point source of 7÷15%, it is n×10–5÷n×10–4%.

Calculation of the Nuclear Transition Charge Density in a Microscopic sdgIBM-1

2000 ◽  
Vol 17 (9) ◽  
pp. 646-648 ◽  
Author(s):  
Zhang Zhan-Jun ◽  
Sang Jian-ping ◽  
Liu Yong
Keyword(s):  
Charge Density ◽  
Nuclear Transition

U-series geochronology using the γ-spectrometry method co-operated with 14C dating results

2018 ◽  
Vol 318 (3) ◽  
pp. 1837-1843
Author(s):  
S. Stoulos ◽  
E. Samartzidou ◽  
Y. Maniatis ◽  
E. Tsoukala
Keyword(s):  
14C Dating ◽  
Spectrometry Method ◽  
Γ Spectrometry

Promoter Analysis of Male Germ-Cell-Specific Genes: Nuclear Transition Protein-1 and Histone H1t

1996 ◽  
pp. 167-185
Author(s):  
Malathi K. Kistler ◽  
John G. Bartell ◽  
Edward A. Shipwash ◽  
Wendy R. Hatfield ◽  
Sharon E. Clare ◽  
...  
Keyword(s):  
Germ Cell ◽  
Promoter Analysis ◽  
Male Germ Cell ◽  
Nuclear Transition ◽  
Transition Protein ◽  
Histone H1t

scholarly journals Production Cross-Section Measurements for Terbium Radionuclides of Medical Interest Produced in Tantalum Targets Irradiated by 0.3 to 1.7 GeV Protons and Corresponding Thick Target Yield Calculations

2021 ◽  
Vol 8 ◽  
Author(s):  
Charlotte Duchemin ◽  
Thomas E. Cocolios ◽  
Kristof Dockx ◽  
Gregory J. Farooq-Smith ◽  
Olaf Felden ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Thick Target ◽  
Mass Separation ◽  
High Purity Germanium ◽  
Spallation Reactions ◽  
Target Yield ◽  
Target Production ◽  
Γ Spectrometry ◽  
Medical Interest

This work presents the production cross-sections of Ce, Tb and Dy radionuclides produced by 300 MeV to 1.7 GeV proton-induced spallation reactions in thin tantalum targets as well as the related Thick Target production Yield (TTY) values and ratios. The motivation is to optimise the production of terbium radionuclides for medical applications and to find out at which energy the purity of the collection by mass separation would be highest. For that purpose, activation experiments were performed using the COSY synchrotron at FZ Jülich utilising the stacked-foils technique and γ spectrometry with high-purity germanium detectors. The Al-27(p,x)Na-24 reaction has been used as monitor reaction. All experimental data have been systematically compared with the existing literature.

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