高振动激发态CsH(v)与CO_2碰撞弛豫过程的实验研究
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摘要
在Cs-H2系统和CO_2的混合系统中,采用简并受激超拉曼(DSHR)泵浦技术,研究了CsH分子的高位振动激发态与CO_2的碰撞弛豫过程,测量了CsH(v=15-23)与CO_2之间的各振动弛豫系数,实验表明v=22时,碰撞弛豫速率系数达到最大值.
The collisional relaxation processes between the highly vibrationally excited Cs H(v=15-23) and CO_2 have been studied by using a degenerate stimulated hypor raman pumping technique. With Cs-H2 and CO_2mixture, the vibrational levels of Cs H(v=0) were generated in the reaction of Cs(7P) and(H2). Rate constants kv(Cs H-CO_2) for collisional relaxations were measured accurately when Cs H level v=15 increases to v=23. For v=22, the rate coefficients is maximum.
The collisional relaxation processes between the highly vibrationally excited Cs H(v=15-23) and CO_2 have been studied by using a degenerate stimulated hypor raman pumping technique. With Cs-H2 and CO_2mixture, the vibrational levels of Cs H(v=0) were generated in the reaction of Cs(7P) and(H2). Rate constants kv(Cs H-CO_2) for collisional relaxations were measured accurately when Cs H level v=15 increases to v=23. For v=22, the rate coefficients is maximum.
引文
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[2]Jongma R T,Wodtke A M.Fast multiquantum vibrational relaxation of highly vibrationally excited O2[J].J Chem Phys,1999,111:10957-10963.
[3]Mc Caffery A J,Pritchard M,Turner J F C,et al.Quantum state-resolved energy redistribution in gas ensembles containing highly excited N2[J].J Chem Phys,2011,134:044317-1/12.
[4]穆保霞,崔秀花,郭国生,等.KH(X1+,V=14-21)高位振动态与CO2碰撞速率系数的测定[J].新疆大学学报,2014,31(3):312-315.
[5]Yuan L W,Du J,Mullin A S.Energy-dependent dynamics of large-?E collisions:highly vibrationally excited azulene(E=20390 and 38 580 cm-1)with CO2[J].J Chem Phys,2008,129(1):014303-1/11.
[6]Wall M C,Stewart B A,Mullin A S.State-resolved collisional relaxation of highly vibrationally excited pyridine by CO2:Influence of a permanent dipole moment[J].J Phys Chem A,1998,108:6185-6196.
[7]Mack J A,Mikulecky K,Wodtke A M.Resonant vibration–vibration energy transfer between highly vibrationally excited O2(X3Σ-g,v=15–26)and CO2,N2O,N2,and O3[J].J Chem Phys,1996,105:4105-4116.
[8]Jongma R T,Wodtke A M.Fast multiquantum vibrational relaxation of highly vibrationally excited O2[J].J Chem Phys,1999,111:10957-10963.
[9]Cui X H,Mu B X,Shen Y F,et al.Vibrational relaxation and vibration-rotation energy transfer between highly vibrationally excited KH(X1Σ+,v=14–21)and CO2[J].J Quant Spectrosc Radiat Transfer,2012,113:2081-2087.
[10]Vadla C,Horvatic V,Niemax K.Radiative transport and collisional transfer of excitation energy in Cs vapors mixed with Ar or He[J].Spectrochimica Acta B,2003,58:1235-1277.
[11]Mu B X,Cui X H,Shen Y F,et al.State-resolved collisional relaxation of highly vibrationally excited Cs H by CO2[J].Spectrochimica Acta Part A,2015,148:299-310.
[12]Stwalley W C,Zemke W T,Yang S C.Spectroscopy and structure of the alkali hydride diatomic molecules and their ions[J].J Phys Chem Ref Date,1991,20(1):153-187.
[13]Cui X H,Mu B X,Shen Y F,et al.Excitation transfer for K2in high-lying states by N2[J].Chin Phys Lett,2010,27(7):073401-1/4.