| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Research Abstract |
The reactions of Zn (4^1P_1) with hydride molecules such as water and alkanes were investigated. The nascent rotational and vibrational distributions of ZnH as well as OH were determined. From these disributions, it is possible to obtained information on the intermediate states of the reactions.
In the case of water, the nascent state distributions of both products, ZnH and OH,were determined. The rotational distributions were both Boltzmann-like. However, the rotational temperatures were significatly different ; 12000K for ZnH and 900K for OH.ZnH was also vibrationally excited, peaking at upsiron^<''>=1. In contrast, no excitation in the OH vibration was observed. Such a non-statistical energy partitioning is explained by considering a short-lived Zn-H-OH intermediate in a non-linear geometry.
The reactions of Zn (4^1P_1) with alkanes were also studied. The nascent rotational and vibrational state distributions of ZnH were compared with those predicted by statistical models. The distributions for C (CH_3) _4 resembled to the statistical ones, while those for simple alkanes were a little hotter than the statistical ones. These results suggest that the reaction proceeds via a relatively long-lived insertive complex. There was no great difference in the production yields of ZnH.
The nascent vibrational state distributions of ZnH and ZnD produced in the reactions of Zn (4^1P_1) with H_2 (D_2) were much cooler than the statistical ones. These results are consistent with the insertive attack model proposed for other excited metal-H_2 systems. The quantum yield for the production of ZnH was measured to be low. Three-body dissociation processes must be more dominant than the production of ZnH.
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