This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.34734/FZJ-2023-04595 in citations.
ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS
ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS
The angular distributions of prompt-fission γ-rays with respect to thedirection of fission fragments in the monochromatic “warm” neutron induced fissionof 235U have been studied. The fragments were detected with low-pressure positionsensitive multi-wire proportional counter and the gamma-rays with a...
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Personal Name(s): | AHMADOV, G. |
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BERIKOV, D. (Corresponding author) / KOPATCH, YU. (Corresponding author) | |
Contributing Institute: |
Streumethoden; PGI-4 JCNS-FRM-II; JCNS-FRM-II Heinz Maier-Leibnitz Zentrum; MLZ JARA-FIT; JARA-FIT JCNS-4; JCNS-4 JCNS-3; JCNS-3 Streumethoden; JCNS-2 |
Published in: | Romanian reports in physics, 75 (2023) 1, S. 202 |
Imprint: |
Bucureşti
Acad.
2023
|
DOI: |
10.34734/FZJ-2023-04595 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
The angular distributions of prompt-fission γ-rays with respect to thedirection of fission fragments in the monochromatic “warm” neutron induced fissionof 235U have been studied. The fragments were detected with low-pressure positionsensitive multi-wire proportional counter and the gamma-rays with a plastic scintillators. The time-of-flight method is used to discriminate prompt neutrons and promptγ-rays of fission. From the measured angular distributions with respect to the directionof the selected fragments, the value of the laboratory anisotropy has been found to be15 % in comparison to the value obtained in the perpendicular direction. The measurements indicate the existence of a significant anisotropy of emission of the γ-rays in theemitting-fragment system, suggesting the presence of significant angular momenta ofthe fragments correlated with the fission axis, which also lead to an enhanced emissionof the γ-rays. Moreover, the article includes a new technique for measuring and correcting the obtained angular distribution, in the case of when plastic scintillators havedifferent threshold levels for detection of γ-rays. |