A Formula Used to Calculate Cross Section of Isomerous State with Characteristic Gamma-Ray of Ground State in a Special Case and Its Application

  • According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to calculate the cross section of isomerous state with characteristic gamma-ray of ground state in a special case was deduced. And the cross sections of 128Te(n,2n)127mTe reaction induced by neutrons around 14MeV were measured and calculated by using the activation technique and the formula deduced above. The experimental results were (737±69) and (853±82)mb at the neutron energies of (14.1±0.2) and (14.6±0.3)MeV, respectively. The samples wrapped in cadmium foil were irradiated in order to avoid the effect of (n, γ) reaction induced by thermal neutron. The neutron energies in these measurements were determined by the method of cross-section ratios between 90Zr(n,2n) 89m+gZr and 93Nb(n,2n) 92mNb reactions, and the neutron fluencies were determined by using the monitor reaction 93Nb(n,2n) 92mNb.
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ZHOU Feng-Qun, ZHAI Zi-Nan, TUO Fei, LUO Jun-Hua and KONG Xiang-Zhong. A Formula Used to Calculate Cross Section of Isomerous State with Characteristic Gamma-Ray of Ground State in a Special Case and Its Application[J]. Chinese Physics C, 2007, 31(7): 625-628.
ZHOU Feng-Qun, ZHAI Zi-Nan, TUO Fei, LUO Jun-Hua and KONG Xiang-Zhong. A Formula Used to Calculate Cross Section of Isomerous State with Characteristic Gamma-Ray of Ground State in a Special Case and Its Application[J]. Chinese Physics C, 2007, 31(7): 625-628. shu
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Received: 2006-10-08
Revised: 2006-10-31
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A Formula Used to Calculate Cross Section of Isomerous State with Characteristic Gamma-Ray of Ground State in a Special Case and Its Application

    Corresponding author: ZHOU Feng-Qun,
  • Department of Physics, Pingdingshan University, Pingdingshan 467000, China2 Department of Modern Physics, Lanzhou University, Lanzhou 730000, China

Abstract: According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to calculate the cross section of isomerous state with characteristic gamma-ray of ground state in a special case was deduced. And the cross sections of 128Te(n,2n)127mTe reaction induced by neutrons around 14MeV were measured and calculated by using the activation technique and the formula deduced above. The experimental results were (737±69) and (853±82)mb at the neutron energies of (14.1±0.2) and (14.6±0.3)MeV, respectively. The samples wrapped in cadmium foil were irradiated in order to avoid the effect of (n, γ) reaction induced by thermal neutron. The neutron energies in these measurements were determined by the method of cross-section ratios between 90Zr(n,2n) 89m+gZr and 93Nb(n,2n) 92mNb reactions, and the neutron fluencies were determined by using the monitor reaction 93Nb(n,2n) 92mNb.

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