FORMATION OF HYDRAZINE BY THE GAMMA-IRRADIATION OF LIQUID AND SOLID AMMONIA (in Russian)
In order to establish the effect of the phase state on radiation chemical processes, the formation of hydrazine in liquid and solid NH/sub 3/ irradiated by gamma-rays from a 2.10/sub 4/ curie Co/sup 60/ source was investigated, varying the radiation rate from 25 to 790 r/sec and the duration of the experiments from 10 to 10/sub 4/ sec. The specimens were kept in quartz containers during the irradiation. After the test, the NH/sub 3/ was evaporated and the hydrazine was determined by a photocalorimetric method with a precision of 10/sup -1/ mg/ml. Lowering the temperature of the liquid phase, the hydrazine yield was found to increase but it decreased after the freezing point of NH/sub 3/ was reached at --78 deg C, being about an order of magnitude lower than in the liquid phase. The temperature dependence of the yield in the liquid corresponds to an energy of activation of about 3 to 4 Kcal/mol. The negative temperature dependence is probably due to the decomposition of the product formed. The hydrazine is probably formed by recombination of the NH/sub 2/ radicals and the interaction of the NH radical with NH/sub 3/. At sufficiently high rates a stationary yield value should be reached where the formation and decomposition rates are identical; this point has not been reached during the tests. The negative temperature coefficient could also result from the diffusion of the NH/ sub 2/ radicals; this agrees well with the energy of activation found. (TTT)
- Research Organization:
- Karpov Physico-Chemical inst., USSR
- NSA Number:
- NSA-15-026081
- OSTI ID:
- 4007616
- Journal Information:
- Doklady Akad. Nauk S.S.S.R., Vol. Vol: 138; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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