Measurement of Cross Sections for 50Cr(n,2n)49Cr and 52Cr(n,2n)51Cr Reactions Induced by 13.5—14.6MeV Neutrons

ZHOU Feng-Qun; YI Yan-Ling; TUO Fei; CAO Xue-Xiang; KONG Xiang-Zhong

Chinese Physics C> 2005, Vol. 29> Issue(7) : 644-647

Measurement of Cross Sections for ⁵⁰Cr(n,2n)⁴⁹Cr and ⁵²Cr(n,2n)⁵¹Cr Reactions Induced by 13.5—14.6MeV Neutrons

Department of Modern Physics,Lanzhou University,Lanzhou 730000,China2 Department of Physics,Pingdingshan University,Pingdingshan 467000,China

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Cross sections for (n,2n) reactions are measured on chromium isotopes at the neutron energies of 13.5—14.6MeV using the activation technique. The data of the cross sections are reported for the following reactions: 50Cr (n,2n)49 Cr and 52Cr (n,2n)51 Cr. The cross sections of 50Cr (n,2n)49 Cr reaction are 3.4±0.2,6.8±0.3,21.5±1.0 and 25.0±1.2mb at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV incident neutron energies,respectively.The cross sections of 185±10,193±9,258±13 and 332±16mb for 52Cr (n,2n)51 Cr reaction are given at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV,respectively.The samples wrapped in cadmium foil are irradiated in order to avoid the effect of 50Cr (n, g)51Cr reaction induced by thermal neutron to 52Cr (n,2n)51Cr reaction,and the measured results are compared with published data. Neutron energies are determined by the method of cross-section ratios of 90Zr(n,2n) 89m+gZr and 93 Nb(n,2n) 92mNb reactions, and the neutron fluencies are determined using the monitor reaction 93 Nb(n,2n) 92mNb.

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ZHOU Feng-Qun, YI Yan-Ling, TUO Fei, CAO Xue-Xiang and KONG Xiang-Zhong. Measurement of Cross Sections for ⁵⁰Cr(n,2n)⁴⁹Cr and ⁵²Cr(n,2n)⁵¹Cr Reactions Induced by 13.5—14.6MeV Neutrons[J]. Chinese Physics C, 2005, 29(7): 644-647.

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Received: 2004-09-23
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Measurement of Cross Sections for ⁵⁰Cr(n,2n)⁴⁹Cr and ⁵²Cr(n,2n)⁵¹Cr Reactions Induced by 13.5—14.6MeV Neutrons

Corresponding author: ZHOU Feng-Qun,

Department of Modern Physics,Lanzhou University,Lanzhou 730000,China2 Department of Physics,Pingdingshan University,Pingdingshan 467000,China

Received Date: 2004-09-23

Accepted Date: 1900-01-01

Available Online: 2005-07-05

Abstract: Cross sections for (n,2n) reactions are measured on chromium isotopes at the neutron energies of 13.5—14.6MeV using the activation technique. The data of the cross sections are reported for the following reactions: 50Cr (n,2n)49 Cr and 52Cr (n,2n)51 Cr. The cross sections of 50Cr (n,2n)49 Cr reaction are 3.4±0.2,6.8±0.3,21.5±1.0 and 25.0±1.2mb at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV incident neutron energies,respectively.The cross sections of 185±10,193±9,258±13 and 332±16mb for 52Cr (n,2n)51 Cr reaction are given at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV,respectively.The samples wrapped in cadmium foil are irradiated in order to avoid the effect of 50Cr (n, g)51Cr reaction induced by thermal neutron to 52Cr (n,2n)51Cr reaction,and the measured results are compared with published data. Neutron energies are determined by the method of cross-section ratios of 90Zr(n,2n) 89m+gZr and 93 Nb(n,2n) 92mNb reactions, and the neutron fluencies are determined using the monitor reaction 93 Nb(n,2n) 92mNb.

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Measurement of Cross Sections for ⁵⁰Cr(n,2n)⁴⁹Cr and ⁵²Cr(n,2n)⁵¹Cr Reactions Induced by 13.5—14.6MeV Neutrons

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Measurement of Cross Sections for ⁵⁰Cr(n,2n)⁴⁹Cr and ⁵²Cr(n,2n)⁵¹Cr Reactions Induced by 13.5—14.6MeV Neutrons

Corresponding author: ZHOU Feng-Qun,

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