Rubidium excited state line shapes from 4D-nF (n = 9, 12, 15, 20) broadened by helium
Document Type
Article
Publication Date
9-27-2025
Abstract
Pump-modulated laser absorption spectroscopy was used to experimentally measure the rubidium 42D5/2 → n2F line shapes broadened by 0-200 Torr of helium. The broadening rates are 175.4±6.6, 144±4, 104±23, and 118±88 MHz/Torr for n = 9,12,15,20 respectively, while the shift rates are +36 ± 8, +113 ± 5, +143 ± 19, and +155 ± 68 MHz/Torr. No asymmetry rates are reported. Broadening rates are seen to decrease slightly with n. The direction of the shift is to the blue, as with other Rb-He transitions, and the magnitude of the shift increases with n. Stark broadening is observed on the 4D5/2 → 152F and 4D5/2 → 202F transitions at pressures above 10 Torr, with fractional ionization of about 9%.
Source Publication
Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073)
Recommended Citation
True, T. M., Nice, D., Mindrup, J., Rice, C. A., & Perram, G. P. (2025). Rubidium excited state line shapes from 4D-nF (N = 9, 12, 15, 20) broadened by helium. Journal of Quantitative Spectroscopy and Radiative Transfer, 347, 109655. https://doi.org/10.1016/j.jqsrt.2025.109655
Comments
This article is accessible by subscription or purchase from Elsevier using the DOI link below. It was published online in September 2025 ahead of the December 2025 issue cited on this page.