Laming J Martin, Grun Jacob
Space Science Division Code 7674L, Naval Research Laboratory, Washington, D.C. 20375, USA.
Phys Rev Lett. 2002 Sep 16;89(12):125002. doi: 10.1103/PhysRevLett.89.125002. Epub 2002 Aug 30.
Atomic-physics calculations of radiative cooling are used to develop criteria for the overstability of radiating shocks. Our calculations explain the measurement of shock overstability by Grun et al. [Phys. Rev. Lett. 66, 2738 (1991)]] and explain why the overstability was not observed in other experiments. The methodology described here can be especially useful in astrophysical situations where the relevant properties leading to an overstability can be measured spectroscopically, but the effective adiabatic index is harder to determine.
利用辐射冷却的原子物理计算来制定辐射激波过稳定性的判据。我们的计算解释了格伦等人[《物理评论快报》66, 2738 (1991)]对激波过稳定性的测量结果，并解释了为什么在其他实验中未观察到过稳定性。这里描述的方法在天体物理情形中可能特别有用，在这些情形下，导致过稳定性的相关特性可通过光谱测量，但有效绝热指数更难确定。
