The emission-line spectrum from a slab of hydrogen at moderate to high densities

Abstract

view Abstract Citations (187) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The emission-line spectrum from a slab of hydrogen at moderate to high densities. Drake, S. A. ; Ulrich, R. K. Abstract The paper presents computation of line intensities for the hydrogen emission from a static slab at moderate to high electron densities. Results are given for the line intensities of L(alpha), H(alpha) through H8, P(alpha) to P(gamma), and B(alpha) to B(gamma); the fractional hydrogen ionization, the slab thickness, and the departure coefficients were tabulated for levels up to n = 20. An escape probability treatment of the radiative transfer was adopted to allow for optical depth effects in the Balmer and higher series of lines; the conditions which produce very steep Balmer decrements are large optical depths in H(alpha), low photoionization rates, and electron densities between 10 to the 8th power and 10 to the 12th power per cu cm. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1980 DOI: 10.1086/190654 Bibcode: 1980ApJS...42..351D Keywords: Atomic Spectra; Emission Spectra; H Lines; Hydrogen Atoms; Nebulae; Slabs; Atomic Structure; Black Body Radiation; Electron Density (Concentration); Electron Energy; Hydrogen Ions; Mathematical Models; Spectral Energy Distribution; Stark Effect; Stellar Spectra; Tables (Data); Astrophysics full text sources ADS |