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Journal of Physical Studies 17(4), Article 4902 [18 pages] (2013)
DOI: https://doi.org/10.30970/jps.17.4902 THE CROSS-SECTIONS OF THE MAIN PROCESSES THAT FORMS THE CONTINUOUS ABSORPTION COEFFICIENT IN THE PHOTOSPHERE OF SUN-LIKE STARSM. V. Vavrukh, O. M. Stelmakh
Ivan Franko National University of Lviv, Department of Astrophysics, |
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The spectral features of the effective relative cross-section for the negative hydrogen ion photoionization in the Solar photosphere near the maximum ($λ\sim 8200 \, \textup\AA$) were explained for the first time in the frames of quantum-mechanical calculations of the main low energy processes of the photon-matter interaction, which forms the absorption coefficient in G-class stars. On the basis of the suggested basic-variative approach the ions H$^-$ photoionization cross-section is calculated. The hypothesis about the peculiarities of the neutral hydrogen atom photoionization in an environment of partially ionized plasma is suggested. This leads to the spectral dependence of the cross-section different from the conventional one in the vicinity of the treshold wavelength.
PACS number(s): 95.30.-k, 95.30.Cq, 96.60.-j 97.10.Ex