软X射线辐射加热金盘靶的X射线再发射

X-RAY REEMISSION FROM GOLD DISK TARGETS HEATED BY SOFT X RAY RADIATION

用两台时间关联的软Ｘ射线能谱仪观测软Ｘ射线辐射（（２—６）×１０１２Ｗ·ｃｍ－２）加热金盘靶的Ｘ射线再发射．从再发射Ｘ射线的时间能谱可看出能谱被“软”化．根据加热脉冲时间修正烧蚀热波的稳态自相似解，分析Ｘ射线再发射的时间演变过程．

Abstract X ray reemission from gold disk targets,which were heated by intense soft X ray radiation((2—6)×10 12 W·cm -2 ),had been observed with two time related soft X ray spectrometers.The spectra of X ray reemission were “softer” than those of irradiating X ray.Temporal evolution of the X ray reemission was analyzed in terms of a time modified self similar solution for the ablative heat wave.