CAJ | 학술논문

氢气与锂蒸气的化学反应速率常数是激光化学法锂同位素分离过程的一个重要参数。本文以可调谐半导体激光器为工具，通过监测锂原子蒸气对光的吸收测量原子蒸气密度的相对变化，建立了一种测量该速率常数的方法。在光化学锂同位素分离的典型条件下测得化学反应速率常数为9.0×10-22 m3/s。该数值对于未来锂同位素分离装置中激光照射时间和氢气密度等参数的选择具有重要指导意义。
경기여리증기적화학반응속솔상수시격광화학법리동위소분리과정적일개중요삼수。본문이가조해반도체격광기위공구，통과감측리원자증기대광적흡수측량원자증기밀도적상대변화，건립료일충측량해속솔상수적방법。재광화학리동위소분리적전형조건하측득화학반응속솔상수위9.0×10-22 m3/s。해수치대우미래리동위소분리장치중격광조사시간화경기밀도등삼수적선택구유중요지도의의。
The rate coefficient of chemical reaction between hydrogen and lithium atomic vapor is an important parameter for a lithium isotope separation process based on laser induced photochemical reaction .In this paper ,a method of measuring the rate coeffi-cient was described .A tunable semiconductor laser was used as optical source .The rel-ative change of the lithium atomic vapor density was achieved by the laser absorption spectroscopy measurements . Under the typical conditions of a photochemical lithium isotope separation process the measured result of rate coefficient is about 9.0 × 10-22 m3/s . This value is of great significance for the determination of parameters such as laser illuminating time and density of hydrogen in a lithium isotope separation facility .