Guo Ying, Xu Haifeng, Li Qifeng, Shi Yong, Dai Jinhua, Liu Shilin, Ma Xingxiao. Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State[J]. Chinese Journal of Chemical Physics , 2005, 18(1): 9-14. doi: 10.1088/1674-0068/18/1/9-14
Citation: Guo Ying, Xu Haifeng, Li Qifeng, Shi Yong, Dai Jinhua, Liu Shilin, Ma Xingxiao. Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State[J]. Chinese Journal of Chemical Physics , 2005, 18(1): 9-14. doi: 10.1088/1674-0068/18/1/9-14

Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State

doi: 10.1088/1674-0068/18/1/9-14
Funds:  Project supported by the National Science Foundation of China(20273063) and the State Key Development Program for Basic Research of China (1999075304).
  • Received Date: 2003-11-04
  • Predissociation lifetimes of totally 13 vibrational levels in the 1B2 state of jet-cooled CS2 have been determined by simulating the rotational band contours of the PHOFEX spectrum in the range of 209. 5 ~ 216 nm, where the PHOFEX spectrum was obtained by monitoring the laser-induced fluorescence of CS fragment via the Q band head excitation of(A 1Π,v' = 0)&(X 1Σ + ,v" = 0)transition. In order to investigate the influence of vibrational angular momentum quantum number K of the excited 1B2 ( 1Σ + U )state,the nozzle was heated to increase the hot-band transition intensities. The results indicate that,for levels with the same vibrational quantum number but different K numbers in the 1B2 ( 1Σ + u )state of CS2 ,the lifetime decreases with the increasing of quantum number K, suggesting that the dissociation could be accelerated by K number.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State

doi: 10.1088/1674-0068/18/1/9-14
Funds:  Project supported by the National Science Foundation of China(20273063) and the State Key Development Program for Basic Research of China (1999075304).

Abstract: Predissociation lifetimes of totally 13 vibrational levels in the 1B2 state of jet-cooled CS2 have been determined by simulating the rotational band contours of the PHOFEX spectrum in the range of 209. 5 ~ 216 nm, where the PHOFEX spectrum was obtained by monitoring the laser-induced fluorescence of CS fragment via the Q band head excitation of(A 1Π,v' = 0)&(X 1Σ + ,v" = 0)transition. In order to investigate the influence of vibrational angular momentum quantum number K of the excited 1B2 ( 1Σ + U )state,the nozzle was heated to increase the hot-band transition intensities. The results indicate that,for levels with the same vibrational quantum number but different K numbers in the 1B2 ( 1Σ + u )state of CS2 ,the lifetime decreases with the increasing of quantum number K, suggesting that the dissociation could be accelerated by K number.

Guo Ying, Xu Haifeng, Li Qifeng, Shi Yong, Dai Jinhua, Liu Shilin, Ma Xingxiao. Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State[J]. Chinese Journal of Chemical Physics , 2005, 18(1): 9-14. doi: 10.1088/1674-0068/18/1/9-14
Citation: Guo Ying, Xu Haifeng, Li Qifeng, Shi Yong, Dai Jinhua, Liu Shilin, Ma Xingxiao. Effect of Vibrational Angular Momentum on the Lifetime of CS21B2(1Σ)State[J]. Chinese Journal of Chemical Physics , 2005, 18(1): 9-14. doi: 10.1088/1674-0068/18/1/9-14

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