Soft x‐ray spectra of highly ionized elements with atomic numbers ranging from 57 to 82 produced by compact lasers
Soft x‐ray spectra of highly ionized elements with atomic numbers ranging from 57 to 82 produced by compact lasers
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由紧凑型激光器产生的原子序数范围为 57 至 82 的高度电离元素的软 X 射线光谱
DOI：
10.1063/1.356339
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发表时间：
1994
影响因子：
3.2
通讯作者：
S. Nakai
中科院分区：
文献类型：
--
作者：
G. Zeng;H. Daido;T. Nishikawa;H. Takabe;S. Nakayama;H. Aritome;K. Murai;Y. Kato;M. Nakatsuka;S. Nakai
使用配备微通道板检测器的掠入射光谱仪记录了19种高原子序数材料（镧至铅）在2-13 nm光谱范围内的X射线发射光谱。在这些光谱中有一个强烈的窄谱带，随着原子序数的增加，该谱带向较短的波长移动，强度变弱。用4J/35 ns板条Nd：glass激光器或0.5J/8 ns Nd：YAG激光器照射材料。光谱的绝对光子强度用绝对校准的电荷耦合器件照相机测定。在0.1%带宽内，镧等离子体谱带峰值强度处的发射峰值亮度为2.1× 10 ~（16）光子/s/mm ~ 2/mrad ~ 2。解释了记录光谱中窄而强的谱带的起源及其对靶材料和激光波长的依赖性。
X‐ray emission spectra in the spectral range of 2–13 nm from 19 kinds of material with high atomic numbers (lanthanum through lead) were recorded with a grazing incidence spectrometer equipped with a microchannel plate detector. There is an intense, narrow spectral band in these spectra which shifts toward shorter wavelength and becomes weak in intensity with increasing atomic number. The materials were irradiated either by a 4 J/35 ns slab Nd:glass laser or by a 0.5 J/8 ns Nd:YAG laser. The absolute photon intensities of the spectra were determined with an absolutely calibrated charge coupled device camera. The peak spectral brightness of the emission at the peak intensity of the spectral band for lanthanum plasma was estimated to be 2.1×1016 photons/s/mm2/mrad2 in 0.1% bandwidth. The origin of the narrow, intense spectral bands in the recorded spectra and their dependence on target materials and laser wavelength are interpreted.