Proton induced fission of 232Th at intermediate energies


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The mass-energy distributions and cross sections of proton-induced fission of 232Th have been measured at the proton energies of 7, 10, 13, 20, 40, and 55 MeV. Experiments were carried out at the proton beam of the K-130 cyclotron of the JYFL Accelerator Laboratory of the University of Jyväskylä and U-150m cyclotron of the Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan. The yields of fission fragments in the mass range A = 60–170 a.m.u. have been measured up to the level of 10−4%. The three humped shape of the mass distribution up has been observed at higher proton energies. The contribution of the symmetric component grows up with increasing proton incident energy; although even at 55 MeV of proton energy the shoulders in the mass energy distribution clearly indicate the asymmetric fission peaks. Evolution of shell structure was observed in the fission fragment mass distributions even at high excitation energy.

作者简介

K. Gikal

Flerov Laboratory of Nuclear Reactions

编辑信件的主要联系方式.
Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

W. Trzaska

Department of Physics

Email: kgikal@mail.ru
芬兰, Jyväskylä, FIN-40351

S. Sahiev

Institute of Nuclear Physics of Ministry of Energy of the Republic of Kazakhstan

Email: kgikal@mail.ru
哈萨克斯坦, Almaty, 050032

V. Rubchenya

Department of Physics; V.G. Khlopin Radium Institute

Email: kgikal@mail.ru
芬兰, Jyväskylä, FIN-40351; St. Petersburg, 194021

E. Piasecki

Heavy Ion Laboratory of Warsaw University

Email: kgikal@mail.ru
波兰, Warsaw

T. Kvochkina

Institute of Nuclear Physics of Ministry of Energy of the Republic of Kazakhstan

Email: kgikal@mail.ru
哈萨克斯坦, Almaty, 050032

K. Kovalchuk

Institute of Nuclear Physics of Ministry of Energy of the Republic of Kazakhstan

Email: kgikal@mail.ru
哈萨克斯坦, Almaty, 050032

G. Knyazhev

Flerov Laboratory of Nuclear Reactions

Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

M. Itkis

Flerov Laboratory of Nuclear Reactions

Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

I. Itkis

Flerov Laboratory of Nuclear Reactions

Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

A. Edomskiy

Institute of Nuclear Physics of Ministry of Energy of the Republic of Kazakhstan

Email: kgikal@mail.ru
哈萨克斯坦, Almaty, 050032

N. Burtebaev

Institute of Nuclear Physics of Ministry of Energy of the Republic of Kazakhstan

Email: kgikal@mail.ru
哈萨克斯坦, Almaty, 050032

A. Bogachev

Flerov Laboratory of Nuclear Reactions

Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

E. Kozulin

Flerov Laboratory of Nuclear Reactions

Email: kgikal@mail.ru
俄罗斯联邦, Dubna, 141980

E. Vardaci

INFN Napoli, Dipartimento di Scienze Fisiche dell’Università di Napoli

Email: kgikal@mail.ru
意大利, Napoli

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