13.5—14.6MeV能区中子引起的铂同位素核反应截面测量  

Cross-Section Measurements for Reactions on Platinum Isotopes Induced by Neutron Beams in Energy Range of 13.5 to 14.6MeV

作　　者：罗均华[1] 周丰群 孔祥忠[1] 

机构地区：[1]兰州大学现代物理系

出　　处：《高能物理与核物理》2005年第6期561-564,共4页High Energy Physics and Nuclear Physics

摘　　要：用活化法以93Nb(n,2n)92mNb和27Al(n,α)24Na反应截面为中子注量标准,对198Pt(n,2n)197m+gPt,198Pt(n,2n)197mPt,192Pt(n,2n)191Pt,194Pt(n,p)194Ir,195Pt(n,p)195mIr和196Pt(n,p)196mIr反应截面进行了测量,由(13.5±0.2),(14.1±0.1)和(14.6±0.2)MeV中子引起的198Pt(n,2n)197m+gPt反应截面分别为(2038±159),(1919±73)和(1836±68)mb,198Pt(n,2n)197mPt反应截面为(974±37),(1055±39)和(1042±39)mb;由(14.1±0.1),(14.4±0.2)和(14.6±0.2)MeV中子引起的192Pt(n,2n)191Pt反应截面为(1680±103),(1810±67)和(2047±97)mb;由(14.1±0.1)和(14.4±0.2)MeV中子引起的194Pt(n,p)194Ir反应截面为(3.8±0.4)和(5.4±0.5)mb;由(14.1±0.1),(14.4±0.2)和(14.6±0.2)MeV中子引起的195Pt(n,p)195mIr反应截面为(1.0±0.2),(1.6±0.2)和(1.8±0.2)mb;由(13.5±0.2)和(14.4±0.2)MeV中子引起的196Pt(n,p)196mIr反应截面分别为(1.13±0.07)和(1.18±0.06)mb.本工作的数据和其他一些作者的数据进行了比较.Cross-sections for (n,2n) and (n,p) reactions have been measured on platinum isotopes at the neutron energies of 13.5 to 14.6 MeV using the activation technique. Data were reported for the following reactions: 198Pt(n,2n)197m+gPt, 198Pt(n, 2n)197mPt, 192Pt(n,2n)191Pt, 194Pt(n,p)194Ir, 195Pt(n,p)195mIr, and 196Pt(n,p)196mIr. At the neutron energies of 13.5, 14.1 and 14.6 MeV, the cross sections in mb are 2038 ± 159, 1919 ± 73 and 1836 ± 68 for 198Pt(n,2n)197m+gPt reaction; 974 ± 37, 1055 ± 39 and 1042 ± 39 for 198Pt(n,2n)197mPt reaction, respectively. The cross sections are 1680 ± 103, 1810 ± 67 and 2047 ± 97 for 192Pt(n,2n)191Pt reaction, and 1.0 ± 0.2, 1.6 ± 0.2 and 1.8 ± 0.2 for 195Pt(n, p)195mIr reaction, respectively, at energies of 14.1, 14.4 and 14.6 MeV. At 14.1 and 14.4 MeV neutron energies, the cross sections are 3.8 ± 0.4 and 5.4 ± 0.5 for 194Pt(n,p)194Ir reaction. While, the data are (1.13 ± 0.07) and (1.18 ± 0.06) mb at energies of 13.5 and 14.4 MeV, respectively, for 196Pt(n,p)196mIr reaction. The neutron fluences were determined using the monitor reaction 93Nb(n, 2n)92mNb or 27Al(n,α)24Na. A comparison was made between the present cross sections and the collected data for the measured reactions.

关 键 词：铂同位素核 反应截面 活化法 样品照射 中子注量 

分 类 号：O571.5[理学—粒子物理与原子核物理]