Influence of Crystal Defects on the Annealing of Chemical Radiation Damage
作者:S. R. MOHANTY、S. R. UPADHYAY
DOI:10.1038/199169b0
日期:1963.7
the fate of the fragments generated in solids by radiativethermalneutroncapture as well as the kinetics of subsequent annealing reactions1,2. So far, there has been no experimental evidence for the influence of defects on the annealing of chemical damage produced in solids by irradiation. We have now obtained such evidence in the case of annealing in lead nitrate.
observations on the thermal annealing of chemical radiation damage appear to be some measurements on potassium nitrate reported in 19551. These measurements did not include isothermal kinetic studies, nor do they appear to exclude some possible alternative explanations of the observations. We have made measurements on the isothermal annealing of radiolysed leadnitrate and subsidiary experiments which
Annealing of Chemical Radiation Damage by Compression
作者:S. R. MOHANTY、S. R. UPADHYAY
DOI:10.1038/201921a0
日期:1964.2
IT has already been reported that defects generated by compression accelerate the thermal annealing of the chemical damage in irradiated crystals1. The work recorded here indicates that compression directly induces recombination of the damage fragments.
据 IT 报道,压缩产生的缺陷会加速辐照晶体中化学损伤的热退火。这里记录的工作表明压缩直接引起损伤碎片的重组。
A New Synthesis of Lead Azide
作者:BRUNO REITZNER、RALPH P. MANNO
DOI:10.1038/198991a0
日期:1963.6
reasons: The solubility of lead azide in pure water is very small. Using an ammonium acetate solution in which the solu bility is higher introduces new impurities. Furthermore, lead azide has a tendency to detonate spontaneously on recrystallization2. A direct synthesis of lead azide from lead oxide and hydrazoic acid yields inhomogeneous yellow products because the lead azide formed on the surface of the
LEAD 叠氮化物原则上仍是通过使用 Curtius1 首次描述的方法制备的。该方法包括使可溶性无机叠氮化物,优选叠氮化钠,与可溶性铅盐,优选硝酸铅或乙酸铅,在水溶液中反应,由此形成叠氮化铅作为沉淀物。沉淀物总是被来自叠氮化物的阳离子和来自铅盐的阴离子所污染。由于以下原因,重结晶纯化很困难:叠氮化铅在纯水中的溶解度很小。使用溶解度较高的醋酸铵溶液会引入新的杂质。此外,叠氮化铅在重结晶时有自爆的趋势2。