The cross sections for the <sup>165</sup>Ho（n.γ）<sup>166</sup>Ho<sup>?</sup> reaction have been measured rel-ative to the <sup>197</sup>Au（n.γ）<sup>198</s...The cross sections for the <sup>165</sup>Ho（n.γ）<sup>166</sup>Ho<sup>?</sup> reaction have been measured rel-ative to the <sup>197</sup>Au（n.γ）<sup>198</sup>Au reaction at neutron energies of 203,676 and 974 keV usingthe activation technique in combination With high resolution HPGe detector gamma rayspectroscopy Experimental data were given for the first time.展开更多
Firstly, according to the regulation of growth and decay of radioactive nuclides produced in reactions, a formula used to calculate the total activation cross section of all possible reactions producing the same radio...Firstly, according to the regulation of growth and decay of radioactive nuclides produced in reactions, a formula used to calculate the total activation cross section of all possible reactions producing the same radioactive nuclide for the same element is deduced, and it is pointed out that the activation formula given in two references is incorrect. Then, as an example, the so-called total activation cross section in one of the two references is analyzed and the correct results of the cross sections of ^182W（n,p）^182（m＋g）Ta, ^183W（n,p）^183Ta and ^206Pb（n,α）^203Hg induced by neutrons around 14 MeV calculated with the data given in the literature, the nuclear parameters and some evaluated values are given. Finally, the correct results are compared with other values collected in the literature.展开更多
According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to subtract the effect of characteristic γ-ray of the others to that of measured reaction was deduced. And then the c...According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to subtract the effect of characteristic γ-ray of the others to that of measured reaction was deduced. And then the cross sections of ^120Te （n, 2n）^119mTe reaction induced by neutrons around 14 MeV were measured by activation relative to the ^93Nb （n, 2n）^92mNb. In the process of the cross sections measured to be calculated, it was subtracted that the effect of characteristic γ-ray of ^126Te （n, p）^126Sb to that of measured ^120Te （n, 2n）^119mTe reaction using the formula deduced. The experimental results were （689±37） and （750±41） mb at the neutron energies of （13.5±0.3） and （14.6±0.3） MeV, respectively. Measurements were carried out by T-detection using a coaxial HPGe detector. As samples, spectroscopically pure tellurium powder has been used. The fast neutrons were produced by the T（d, n）4He reaction. 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.展开更多
文摘The cross sections for the <sup>165</sup>Ho（n.γ）<sup>166</sup>Ho<sup>?</sup> reaction have been measured rel-ative to the <sup>197</sup>Au（n.γ）<sup>198</sup>Au reaction at neutron energies of 203,676 and 974 keV usingthe activation technique in combination With high resolution HPGe detector gamma rayspectroscopy Experimental data were given for the first time.
基金Supported by Program for Science & Technology Innovation Talents of Universities of Henan Province,China (HASTIT032)Research Program for Basic & Forefront Technology of Henan Province,China (092300410144,102300410043)Scientific Research Start up Outlay of High-Position Talent at Pingdingshan University in Henan Province,China
文摘Firstly, according to the regulation of growth and decay of radioactive nuclides produced in reactions, a formula used to calculate the total activation cross section of all possible reactions producing the same radioactive nuclide for the same element is deduced, and it is pointed out that the activation formula given in two references is incorrect. Then, as an example, the so-called total activation cross section in one of the two references is analyzed and the correct results of the cross sections of ^182W（n,p）^182（m＋g）Ta, ^183W（n,p）^183Ta and ^206Pb（n,α）^203Hg induced by neutrons around 14 MeV calculated with the data given in the literature, the nuclear parameters and some evaluated values are given. Finally, the correct results are compared with other values collected in the literature.
基金Supported by Program for Science & Technology Innovation Talents in Universities of Henan Province,China (2008HASTIT032)Scientific Research Start up Outlay of High-Position Talent in Pingdingshan University in Henan Province,China
文摘According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to subtract the effect of characteristic γ-ray of the others to that of measured reaction was deduced. And then the cross sections of ^120Te （n, 2n）^119mTe reaction induced by neutrons around 14 MeV were measured by activation relative to the ^93Nb （n, 2n）^92mNb. In the process of the cross sections measured to be calculated, it was subtracted that the effect of characteristic γ-ray of ^126Te （n, p）^126Sb to that of measured ^120Te （n, 2n）^119mTe reaction using the formula deduced. The experimental results were （689±37） and （750±41） mb at the neutron energies of （13.5±0.3） and （14.6±0.3） MeV, respectively. Measurements were carried out by T-detection using a coaxial HPGe detector. As samples, spectroscopically pure tellurium powder has been used. The fast neutrons were produced by the T（d, n）4He reaction. 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.
