Eur. Phys. J. A (2017) 53: 131
https://doi.org/10.1140/epja/i2017-12318-2

Regular Article - Experimental Physics

Measurement of fission cross section for ²³²Th (n,f) ¹³¹ _ZX ( Z = 50 , 51, 52, 53) reaction induced by neutrons around 14 MeV

¹ School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, Gansu Province, China
² Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, 621900, Mianyang, Sichuan Province, China

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Received: 3 December 2016
Accepted: 13 May 2017
Published online: 21 June 2017

Abstract

The fission cross sections of ²³²Th (n,f) ^{131m, g}Sn , ²³²Th (n,f) ¹³¹Sb , ²³²Th (n,f) ^{131m, g}Te , ²³²Th (n,f) ¹³¹I fission reactions induced by 14MeV neutrons were measured precisely with the neutron activation technique. The neutron flux was monitored by accompanying particle in the irradiation and the neutron energies were determined by the cross section ratio of ⁹⁰Zr (n,2n) ⁸⁹Zr to ⁹³Nb (n,2n) ^92mNb reaction. The values of the cross sections of ²³²Th (n,f) ^{131m, g}Sn were analyzed, and the cross sections of ²³²Th (n,f) ¹³¹Sb were deduced to be , , mb at , and MeV, respectively. The values of the cross sections of ²³²Th (n,f) ^131gTe were deduced to be , and mb at , and MeV, respectively. The values of the cross sections of ²³²Th (n,f) ¹³¹I were given as , , mb at , and MeV, respectively.