高剥离态74W软X射线谱半连续带研究
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摘要: 在星光–II激光装置上，用PET平晶谱仪观测了74W高离化度激光等离子体软X射线发射谱，波长范围是0.36 ~ 0.52nm。准确测量和辨认了3dj–nfj(n=5,6)4条类Ni共振线及附近类Cu、类Zn、类Ga和类Ge几个电离级16个半连续带结构谱。实验谱波长测量误差小于0.0005nm，与用相对论自旋轨道劈裂跃迁组（SOSA）模型（不可分辨跃迁组（UTA）特例）和Xa 法理论计算结果符合很好。首次提出迭加峰平均波长与离子离化度间关系式。实验和理论数据对等离子体诊断等研究有重要应用价值。Abstract: On the Xingguang II laser facilities the soft X ray spectra of a laser –produced plasma of highly ionized 74W in the wavelength range 0.36 ~ 0.52nm were investigated with a plane crystal spectrograph. Four 3dj – nfj (n =5,6) resonance lines in Ni – like ions, as well as sixteen broad, characteristic, pseudo – continuous transition bands in Cu –, Zn –, Ga – and Ge –like ions, were measured and identified accurately. The wavelength precision is ± 0.0005nm. The relativistic Spin – Orbit – Split Arrays (SOSA) model, a particular case of Unresolved Transition Arrays (UTA), and the Xa method support this analysis: The succinct formulas of the mean wavelength vs the ionized stage were achieved first. The data of the experiment and the calculation have important uses for plasma diagnost
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Key words:
- 74w /
- highly ionized /
- pseudo –continuous band /
- uta /
- sosa
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