Motional Stark effect on bound-free spectra

IF 2.9 2区 物理与天体物理 Q2 Physics and Astronomy Physical Review A Pub Date : 2024-09-10 DOI:10.1103/physreva.110.032808
Thomas A. Gomez, Mark C. Zammit, Christopher J. Fontes, Igor Bray, Jackson White
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Abstract

The motion of atoms through a magnetic field (due to a change in reference frame) will result in an additional electric field felt by the electrons in that atom. The motional Stark effect is a well-established effect that has been approximately included in calculations of spectra of magnetized plasmas, usually through diagonalizing the Hamiltonian. The motional Stark effect for continuum states is poorly defined due to an overlap integral that results in a Dirac delta function. This paper presents a workaround by evaluating the motional Stark effect in the Green's function within the scattering formalism. We report on some results pertaining to bound-free spectra for white dwarf and neutron star magnetic field strengths. In most cases, resonances in the continuum are shifted and broadened. This behavior has the effect of raising the Rosseland mean opacity in white dwarfs and neutron star atmospheres.

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无边界光谱上的运动斯塔克效应
原子在磁场中的运动(由于参照系的改变)会导致原子中的电子感受到额外的电场。运动斯塔克效应是一种公认的效应,通常通过将哈密顿对角线化,将其近似地包含在磁化等离子体的光谱计算中。连续态的运动斯塔克效应由于重叠积分导致的狄拉克三角函数而定义不清。本文提出了一种变通方法,即在散射形式主义中评估格林函数中的运动斯塔克效应。我们报告了有关白矮星和中子星磁场强度的无边界光谱的一些结果。在大多数情况下,连续体中的共振会发生位移和展宽。这种行为会提高白矮星和中子星大气中的罗瑟兰平均不透明度。
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来源期刊
Physical Review A
Physical Review A 物理-光学
CiteScore
5.40
自引率
24.10%
发文量
0
审稿时长
2.2 months
期刊介绍: Physical Review A (PRA) publishes important developments in the rapidly evolving areas of atomic, molecular, and optical (AMO) physics, quantum information, and related fundamental concepts. PRA covers atomic, molecular, and optical physics, foundations of quantum mechanics, and quantum information, including: -Fundamental concepts -Quantum information -Atomic and molecular structure and dynamics; high-precision measurement -Atomic and molecular collisions and interactions -Atomic and molecular processes in external fields, including interactions with strong fields and short pulses -Matter waves and collective properties of cold atoms and molecules -Quantum optics, physics of lasers, nonlinear optics, and classical optics
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