A study of reaction rates of (n, f), (n, gamma) and (n, 2n) reactions in U-nat and Th-232 by the neutron fluence produced in the graphite set-up (GAMMA-3) irradiated by 2.33 GeV deuteron beam

0376762 - ÚJF 2013 RIV DE eng J - Journal Article
Adam, Jindřich - Bhatia, CH. - Katovsky, K. - Kumar, V. - Majerle, Mitja - Pronskikh, V. S. - Khilmanovich, A. M. - Martsynkevich, B.A. - Zhuk, I.V. - Golovatiouk, V. M. - Westmeier, W. - Solnyshkin, A. A. - Tsoupko-Sitnikov, V. M. - Potapenko, A.S. … Total 15 authors
A study of reaction rates of (n, f), (n, gamma) and (n, 2n) reactions in U-nat and Th-232 by the neutron fluence produced in the graphite set-up (GAMMA-3) irradiated by 2.33 GeV deuteron beam.
European Physical Journal A. Roč. 47, č. 7 (2011), 85/1-85/17. ISSN 1434-6001. E-ISSN 1434-601X
R&D Projects: GA MŠMT LA08002
Institutional research plan: CEZ:AV0Z10480505
Keywords : CROSS-SECTIONS * SPALLATION SOURCE * CASCADE CODE
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 2.190, year: 2011

Spallation neutrons produced in the collision of a 2.33 GeV deuteron beam with a large lead target are moderated by a thick graphite block surrounding the target and used to activate the radioactive samples of U-nat and Th put at three different positions, identified as holes "a", "b" and "c" in the graphite block. Rates of the (n, f), (n, gamma) and (n, 2n) reactions in the two samples are determined using the gamma spectrometry. The ratios of the experimental reaction rates, R(n, 2n)/R(n, f), for 232 Th and U-nat are estimated in order to understand the role of the (n, xn) kind of reactions in Accelerator-Driven Subcritical Systems. For the Th-sample, the ratio is similar to 54(10)% in the case of hole "a" and similar to 95(57)% in the case of hole "b" compared to 1.73(20)% for hole "a" and 0.710(9)% for hole "b" in the case of the U-nat sample.
Permanent Link: http://hdl.handle.net/11104/0209082