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| Hauptseite > Publikationsdatenbank > ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS |
| Hauptseite > Publikationsdatenbank > ANGULAR DISTRIBUTION OF PROMPT FISSION γ-RAYS |
| Journal Article | FZJ-2023-04595 |
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2023
Acad.
Bucureşti
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Please use a persistent id in citations: doi:10.34734/FZJ-2023-04595
Abstract: 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.
Keyword(s): Nuclei and Particles (1st) ; Nuclear Physics (2nd)
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