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Photoionization of the hydrogen atom in strong magnetic fieldsThe photoionization of the hydrogen atom in magnetic fields B about 10 exp 11 - 10 exp 13 G typical of the surface layers of neutron stars is investigated analytically and numerically. We consider the photoionization from various tightly bound and hydrogen-like states of the atom for photons with arbitrary polarizations and wave-vector directions. It is shown that the length form of the interaction matrix elements is more appropriate in the adiabatic approximation than the velocity form, at least in the most important frequency range omega much less than omega(B), where omega(B) is the electron cyclotron frequency. Use of the length form yields nonzero cross sections for photon polarizations perpendicular to the magnetic field at omega less than omega(B); these cross sections are the ones that most strongly affect the properties of the radiation escaping from an optically thick medium, e.g., from the atmosphere of a neutron star. The results of the numerical calculations are fitted by simple analytical formulas.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Potekhin, Aleksandr IU. (Russian Academy of Sciences, Physical-Technical Inst. St. Petersburg, Russia)
Pavlov, George G. (Pennsylvania State Univ. University Park; Russian Academy of Sciences, Physical-Technical Inst., St. Petersburg, Russia)
Date Acquired
August 16, 2013
Publication Date
April 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 407
Issue: 1
ISSN: 0004-637X
Subject Category
Funding Number(s)
Distribution Limits