THE LOW TRANSLATIONAL ENERGY-DEPENDENCE OF THE REACTION AR+(2P3/2,1/2) + H2(D2)

被引:10
作者
HAWLEY, M [1 ]
SMITH, MA [1 ]
机构
[1] UNIV ARIZONA,DEPT CHEM,TUCSON,AZ 85721
关键词
D O I
10.1063/1.462394
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report the measurement of the spin-orbit state specific rate coefficients for the reactions Ar+ (2P3/2,1/2) + H2(D2) at translational temperatures from 0.5 to 3 K in a free jet flow reactor. The measured rate coefficient for Ar+ (2p3/2) with either H2 or D2 shows a slow monotonic increase with increasing collision energy from 4 X 10(-5) to 10 eV. The observed kinetic isotope effect at low energy is consistent with the simple mass-dependent change in the collision frequency. Below 3 K, excitation into the 2P1/2 state is found to enhance the total reaction rate by a factor of 2.7 for the reaction with H2 and by 1.6 for the reaction with D2. The full range of energy-dependent experimental results are compared to current reaction models.
引用
收藏
页码:7440 / 7444
页数:5
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