Radiative widths and splitting of cyclotron lines in superstrong magnetic fields
Radiative widths and splitting of cyclotron lines in superstrong magnetic fields
复制标题
超强磁场中回旋线的辐射宽度和分裂
DOI：
10.1086/170611
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
S. Alexander
中科院分区：
文献类型：
--
作者：
G. Pavlov;V. Bezchastnov;P. Mészáros;S. Alexander
本文计算了超强磁场中朗道能级的辐射线宽，给出了在较宽的主量子数和磁场强度范围内都适用的简单解析表达式和拟合公式。如果不考虑QED修正，除了第一个能级外，所有能级都是双简并的，对应于两种可能的自旋投影。然而，与QED真空的相互作用消除了这种简并性，导致每个能级的能量分裂，如果磁场不太大（B小于约10 exp 13 G），则该能量分裂超过低朗道能级的辐射线宽。估计分裂在各种限制作为场强和朗道数的函数。讨论了在吸积X射线爆发和γ射线爆发中观测到这种分裂的可能性。
The radiative line widths of the Landau levels in a superstrong magnetic field are calculated and simple analytic expressions and fits are given for these which are valid over a wide range of the principal quantum number and the magnetic field strength. If QED corrections are not taken into account, all levels but the first are doubly degenerate, corresponding to the two possible spin projections. However, the interaction with the QED vacuum removes this degeneracy, leading to an energy splitting of each level which exceeds the radiative linewidth for low Landau levels if the magnetic field is not too large (B is less than approximately 10 exp 13 G). Estimations are presented of the splitting in various limits as a function of field strength and Landau number. The possibility of observing this splitting in accreting X-ray pulsars and in gamma-ray bursters is discussed.