Line radiation from a hot, optically thin plasma: collision strengths and emissivities
Line radiation from a hot, optically thin plasma: collision strengths and emissivities
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来自热、光学稀薄等离子体的线辐射：碰撞强度和发射率
DOI：
10.1086/190862
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发表时间：
1983
影响因子：
8.7
通讯作者：
E. Salpeter
中科院分区：
文献类型：
--
作者：
T. Gaetz;E. Salpeter
我们收集了热、光学稀薄等离子体中 1 至 3000 A 之间最强多重态碰撞强度的理论和实验数据。包括的元素有H、He、C、N、O、Ne、Mg、Si、S和Fe。为 4 x 10/sup 4/ 和 K 之间的温度下最强多重粒子的碰撞强度提供了作为气体动力学电子温度的函数的简单幂律拟合。对于稳态平衡离子丰度峰值温度的 3 倍以内的温度，拟合效果约为 10%。这些强多重态的碰撞强度也用于计算假设处于稳态碰撞电离平衡的等离子体的多重态发射率。多重发射率是在 2.5 x 10/sup 6/ 和 1 x 10/sup 8/ K 之间的温度下给出的。我们还提供了总稳态发射率（包括连续谱）和选定能量箱中的发射率。但请注意，对于温度低于约 3 x 10/sup 6/ K 的激波加热等离子体，稳态碰撞电离平衡并不是一个好的假设。
We collect theoretical and experimental data for collision strengths of the strongest multiplets between 1 and 3000 A in a hot, optically thin plasma. The elements included are H, He, C, N, O, Ne, Mg, Si, S, and Fe. Simple power-law fits, as a function of gas-kinetic electron temperature, are provided for the collision strengths of the strongest multpletes for temperatures between 4 x 10/sup 4/ and K. The fits are good to approx.10% for temperatures within a factor of 3 of the temperature at which the steady-state equilibrium ion abundance peaks. The collision strengths for these strong multiplets are also used to calculate the multiplet emissivities for a plasma assumed to be in steady-state collisional ionizaton equilibrium. The multiplet emissivities are given for temperatures between 2.5 x 10/sup 6/ and 1 x 10/sup 8/ K. We also present the total steady-state emissivity (including continuum) and the emissivities in selected energy bins. Note, however, that steady-state collisional ionization equilibrium is not a good assumption for shock-heated plasmas for temperatures lower than approx.3 x 10/sup 6/ K.