Pulse Radiolysis Studies on the Primary Process in the Irradiated Melts of Alkali Halides

The primary species produced in The irradiated melts of alkali halides和那些mixtures have been观察由pulse radiolysis.我们已经发现了following results.1)建立pulseradiolysis system for the melts：我们modified the pulse rakiolysis system to be be use for the high temperature melts.这是现在available to the experiments up to 700 - c.a电脑控制器puse radiolysis系统已经存在constructed.2)LiCl-KCl melts：我们已经观察了transient光学吸收spectrum，whose maxima lie on the visible region and UV region.我们已经observed the composition dependece andthe temperature dependence of the spectrum as well as the scavenger effects.这些影响shown that the visible band and UV band are attributed to e^- _and Cl^- _respectively . the residualspectrum in the UV region, which is tentatively attributed to Cl^-_has been observed after e^- _and Cl^- _almost decayed. The relation between The transition energyderived from the…More absorption maximum of e^- _and the mean ion destance of the melt has given thereasonable interpretation of the dependence of the spectrum on temperature and composition of the spectrummelt . however,我们需要更多的经验来理解localizing sites ofe^-_.3)LiBr-KBr melts：我们observed the time dependent absorption spectrum which reveals the exsistence of Br^- _in theUV区域after the irradiation. It could give the confirmation of the exsistence ofLiF-NaF-KF melts:Pulse radiolysis of LiF-NaF-KF eutectic melt has been carried out. Besidesvisible band attributed to e^-_，我们已经观察了300纳米的紫外线带的尾巴。chlolide and bromide meltsthis tail would show the exsistence of F^- _in the melt studied.5)Summary：我们studied the pulse radiolysis of alkali halide melts and observed the e^-_，x^- _and x^- _as the primary species，我们已经发现了反应机制，其中的实验反应可以被干预well . less

The primary species produced in the irradiated melts of alkali halides and those mixtures have been observed by pulse radiolysis. We have found the following results.1)Construction of the pulse radiolysis system for the melts : We modified the pulse rakiolysis system to be able to use for the high temperature melts. It is now available to the experiments up to 700゜C. A computer controlled puse radiolysis system has been also constructed.2)LiCl-KCl melts : We have observed the transient optical absorption spectrum, whose maxima lie on the visible region and UV region. We have observed the composition dependece and the temperature dependence of the spectrum as well as the scavenger effects. These results have shown that the visible band and UV band are attributed to e^-_ and Cl^-_ respectively. The residual spectrum in the UV region, which is tentatively attributed to Cl^-_, has been observed after e^-_ and Cl^-_ almost decayed. The relation between the transition energy derived from the … More absorption maximum of e^-_ and the mean ion destance of the melt has given the reasonable interpretation of the dependence of the spectrum on temperature and composition of the melt. However, we need further experiments to obtain more precise understanding of the localizing sites of e^-_.3)LiBr-KBr melts : We have observed the time dependent absorption spectrum which reveals the exsistence of Br^-_ in the UV region after the irradiation. It could give the confirmation of the exsistence of Cl^-_.4)LiF-NaF-KF melts :Pulse radiolysis of LiF-NaF-KF eutectic melt has been carried out. Besides the visible band attributed to e^-_, we have observed the tail of UV band below 300nm. Being compared with the results obtained in alkli chlolide and bromide melts, this tail would show the exsistence of F^-_ in the melt studied.5)Summary : We have studied the pulse radiolysis of alkali halide melts and observed the e^-_, x^-_ and x^-_ as the primary species, and we have discussed the reaction mechanism by which the experimental results can be interpreted well. Less