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Fine structure relaxation of aluminum by atomic argon between 30 and 300 K: An experimental and theoretical study

机译:30至300 K之间原子氩对铝的细微结构弛豫:实验和理论研究

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This paper reports the first measurements at low temperatures (44-137 K) of rate coefficients for collision induced spin-orbit transitions, using a swarm experiment consisting of a uniform 'supersonic flow coupled with pulsed laser photolysis and laser-induced fluorescence techniques. It has been stated that both excitation and relaxation rates have a positive temperature dependence. The excitation (respectively relaxation) rate constant is 0.15 x 10(-12) cm(3) s(-1) (respectively 1.63 x 10(-12)) at 53 K and 2.76 x 10(-12) cm(3) s(-1) (respectively 4.48 x 10(-12)) at 137 K. A theoretical modelization of the Al-Ar system has been developed in the 30-300 K range, that reproduces the temperature dependence. (C) 1998 American Institute of Physics. [References: 48]
机译:本文报告了在低温(44-137 K)下首次进行的碰撞系数自旋轨道跃迁速率系数的测量,使用了由均匀超声速流,脉冲激光光解和激光诱导荧光技术组成的群实验。已经指出,激发速率和弛豫速率均具有正温度依赖性。在53 K和2.76 x 10(-12)cm(3)时的激发(分别弛豫)速率常数为0.15 x 10(-12)cm(3)s(-1)(分别为1.63 x 10(-12)) s(-1)(分别为4.48 x 10(-12))在137 K时。在30-300 K范围内开发了Al-Ar系统的理论模型,该模型再现了温度依赖性。 (C)1998美国物理研究所。 [参考:48]

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