原子与分子物理学报, 2002, 19 (4): 383, 网络出版: 2006-05-19
镥的激光共振电离同位素选择性研究
Study of Isotopic Selectivity in Laser Resonance Ionization of Lutetium Atom
同位素选择性 共振电离质谱(RIS) 镥 同位素比值 Isotopic selectivity Laser resonance ionization mass spectrometry Lutetium Isotopic ratio
摘要
本文在速率方程基础上通过数值模拟方法,对镥的激光共振电离通道:5d6s22D3/2(573.655nm)→5d6s6p4F3/2(642.518 nm)→6s6p24P1/2(643.548 nm)→Autoionization state的激光诱导同位素选择性进行了研究.在实际实验条件下用这一方法计算得到的激光波长对激光诱导同位素选择性的关系与实验结果相符合.探讨了在偏振激光作用的情况下各种激光参数(波长、带宽和激光强度)对激光诱导同位素选择性的影响,并?岢隽嗽谝欢ㄊ笛樘跫录す夤舱竦缋胫势准平衔既返夭舛ㄍ凰乇戎档姆椒?这一理论方法,同样适用于研究其它元素的激光共振电离同位素选择性和选择激光同位素分离电离通道.
Abstract
Using numerical simulation method in terms of rate equation approximation, laser induced isotopic selectivity of the scheme of resonance ionization: 5d6s 2 2D 3/2 (573.655 nm)→ 5d6s6p 4F 3/2 (642.518 nm)→ 6s6p 2 4P 1/2 (643.548 nm)→Autoionization state was studied. The function of isotopic selectivity on laser wavelength was calculated for the parameters matching real experimental conditions by this method. The results calculated were well met with the experimental. The dependences of laser induced isotopic selectivity on the laser parameters, such as wavelength, bandwidth and intensity, were discussed in view of the interaction of linearly polarized light with lutetium atom. The approaches that isotopic ratio were accurately determined by laser resonance ionization mass spectrometry in the case of certain laser parameters were presented. This theoretical method may be also used to study the isotopic selectivity of other elements and select the scheme of resonance ionization of laser isotope separation.
李志明, 朱凤蓉, 邓虎, 张子斌, 任向军, 翟利华, 韦冠一, 张利兴. 镥的激光共振电离同位素选择性研究[J]. 原子与分子物理学报, 2002, 19(4): 383. 李志明, 朱凤蓉, 邓虎, 张子斌, 任向军, 翟利华, 韦冠一, 张利兴. Study of Isotopic Selectivity in Laser Resonance Ionization of Lutetium Atom[J]. Journal of Atomic and Molecular Physics, 2002, 19(4): 383.