Publication Date:
2020-08-01
Description:
An active fission target has been developed for the FIPPS instrument at ILL, enabling for the first time an efficient suppression of $$upbeta $$ β -delayed $$upgamma $$ γ rays in high-resolution and high-efficiency $$upgamma $$ γ -ray spectroscopy of fission fragments at a neutron beam. The target is based on a liquid scintillator in which the actinide is dissolved, resulting in a 4$$pi $$ π fragment detection. Measurements have been performed with $$^{233, 235}$$ 233 , 235 U, with a fission tagging efficiency of 97.8(25)%. The high efficiency, together with the good time resolution of the scintillator target, provide high-selectivity data for $$upgamma $$ γ -ray spectroscopy studies of fission fragments.
Print ISSN:
1434-6001
Electronic ISSN:
1434-601X
Topics:
Physics
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