摘要
测量了由１４ ．９ Ｍｅ Ｖ 中子入射金属产生的反冲核的能谱．用活化技术测量溅射产额随靶与收集器之间距离的变化，用统一的原子阻止本领公式来计算溅射粒子在空气中的能量损失．溅射粒子的能量分布可由不同距离的溅射产额和能量损失导出．用这种方法第一次测量了 Ｍｇ 、 Ａｌ 、 Ｃｒ 、 Ｆｅ 、 Ｃｏ 、 Ｎｂ 和３１６ 型不锈钢等７ 种样品的８
The energy spectra of radioactive recoil nuclides sputtered from metallic target induced by 14.9 MeV neutrons are measured. The activation measurement technique is used to measure the change of sputtered activities with the distances between targets and collectors. The energy loss of the sputtered particles in the air is calculated by a formula of universal nuclear stopping power. The energy distributions are deduced from the sputtered activities and the energy loss in the different distances. In this method the energy spectra of recoil nuclides for thick target from seven samples of Mg, Al, Cr, Fe, Co, Nb and type 316 stainless steel with 8 reactions have been presented in the first time.
基金
中国科学院和中国科学技术大学回国留学人员基金
