TY  - JOUR
AU  - AHMADOV, G.
AU  - BERIKOV, D.
AU  - KOPATCH, YU.
TI  - ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS
JO  - Romanian reports in physics
VL  - 75
IS  - 1
SN  - 1221-1451
CY  - Bucureşti
PB  - Acad.
M1  - FZJ-2023-04595
SP  - 202
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.34734/FZJ-2023-04595
UR  - https://juser.fz-juelich.de/record/1018151
ER  -