%0 Journal Article
%A AHMADOV, G.
%A BERIKOV, D.
%A KOPATCH, YU.
%T ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS
%J Romanian reports in physics
%V 75
%N 1
%@ 1221-1451
%C Bucureşti
%I Acad.
%M FZJ-2023-04595
%P 202
%D 2023
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.34734/FZJ-2023-04595
%U https://juser.fz-juelich.de/record/1018151