【摘要】 用活化法以９３Ｎｂ（ｎ，２ｎ）９２ｍＮｂ反应截面为中子注量标准，对９０Ｚｒ（ｎ，２ｎ）８９Ｚｒ反应截面进行了测量．测得的１３．６４，１３．８０，１４．０１，１４．３５，１４．６２和１４．８０ＭｅＶ中子引起的９０Ｚｒ（ｎ，２ｎ）８９Ｚｒ反应截面值分别为４８３．０±１０．６，５３９．７±１１．９，６０６．３±１３．３，７１０．６±１５．６，７７５．４±１７．１和８２５．５±１８．２ｍｂ．单能中子由Ｔ（ｄ，ｎ）４Ｈｅ反应获得，中子能量由硅控测器法测定．并把本工作的数据和其他一些作者的数据进行了比较更多还原

【Abstract】 The activation cross sections for 90 Zr(n,2n) 89 Zr reaction have been measured for a range of neutron energies from 13 64 to 14 80MeV. The 93 Nb(n,2n) 92m Nb reaction was used to monitor the d T neutron fluence in the target samples. The results of 483 0±10 6,539 7±11 9, 606 3±13 3,710 6±15 6, 755 4±17 1 and 825 5±18 2mb were obtained at neutron energies of 13 64,13 80, 14 01, 14 35, 14 62, and 14 80MeV, respectively. The neutron energies were determined by using a silicon detector. The results of this work are compared with other measurements reported of the 90 Zr(n,2n) 89 Zr reaction.更多还原