scholarly journals Weak magnetism correction to allowed β decay for reactor antineutrino spectra

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
X. B. Wang ◽  
A. C. Hayes
Keyword(s):  
Β Decay ◽  
Reactor Antineutrino ◽  
Weak Magnetism

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%.

Investigation of bound state β− decay half-lives of bare atoms

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
Shuo Liu ◽  
Chao Gao ◽  
Chang Xu
Keyword(s):  
Bound State ◽  
Β Decay

scholarly journals Direct measurement of the mass difference of As72−Ge72 rules out As72 as a promising β -decay candidate to determine the neutrino mass

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Z. Ge ◽  
T. Eronen ◽  
A. de Roubin ◽  
D. A. Nesterenko ◽  
M. Hukkanen ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Neutrino Mass ◽  
Mass Difference ◽  
Β Decay

scholarly journals Total absorption spectroscopy of the β decay of Zr101,102 and Tc109

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
A. C. Dombos ◽  
A. Spyrou ◽  
F. Naqvi ◽  
S. J. Quinn ◽  
S. N. Liddick ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Total Absorption ◽  
Β Decay

scholarly journals Search for double- β decay of Ge76 to excited states of Se76 with the majorana demonstrator

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
I. J. Arnquist ◽  
F. T. Avignone ◽  
A. S. Barabash ◽  
C. J. Barton ◽  
F. E. Bertrand ◽  
...  
Keyword(s):  
Excited States ◽  
Β Decay ◽  
Double Β Decay

scholarly journals Total absorption gamma-ray spectroscopy study of the β-decay of 186Hg

2021 ◽  
pp. 136438
Author(s):  
A. Algora ◽  
E. Ganioğlu ◽  
P. Sarriguren ◽  
V. Guadilla ◽  
L.M. Fraile ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Total Absorption ◽  
Spectroscopy Study ◽  
Β Decay ◽  
Gamma Ray Spectroscopy
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