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 - Článek v odborném periodiku
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. … celkem 15 autorů
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
Grant CEP: GA MŠMT LA08002
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: CROSS-SECTIONS * SPALLATION SOURCE * CASCADE CODE
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 2.190, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0209082