激光冷凝抑制法分离同位素研究进展及现状

Research Progress And Status Quo of Condensation Repression by Isotope Selective Laser Excitation for Isotope Separation

激光冷凝抑制(condensation repression by isotope selective laser excitation,CRISLA)同位素分离方法属于分子激光法(molecular laser isotope separation,MLIS)的一种。在该方法中,激光对低温射流中目标同位素分子生成的范德瓦尔斯络合物进行选择性光解离,利用解离后的单体分子与未解离络合物之间存在的较大质量和运动速度差异实现同位素分离,表现为激光对射流中特定分子的冷凝抑制。近年来,CRISLA逐渐显露出在同位素分离领域的独特优势,成为分子激光法的主流。本研究简述分子激光法的发展历程以及激光冷凝抑制主要特点,概述该方法的分离机理、技术要点,介绍工程化发展现状及应用潜力,并提出未来研究方向及发展趋势。

The isotope separation scheme called condensation repression by isotope selective laser excitation(CRISLA)comes from molecular laser isotope separation(MLIS)method.In this scheme,the Van der Waals complex of the target isotopic molecules generated in the cool jet is selectively photodissociated by laser.The separation of isotopic molecules is achieved by the large mass and velocity differences between the dissociated monomer molecule and the undissociated complex,which is manifested as the condensation repression of specific molecules by laser.In recent years,CRISLA has gradually shown its unique advantages in the field of isotope separation which has become the mainstream of MILS.In this paper,the development of MILS and the main characteristics of CRISLA are briefly described.The separation mechanism,main published research work and the related technical key points of the method are summarized.This paper also introduces the industrial development status and application potential of this scheme.Based on the above contents,some new research directions are proposed and the future development trend is forecasted.It is hoped to provide a reference for the establishment of this new isotope separation method.