Abstract

A pulse-amplitude-modulated form of the Reiche–Ladenburg reabsorption technique has been devised to determine relative transition probabilities for a number of spectral lines terminating on the He 2¹S level. The technique provides accurate upward branching ratios from metastable levels. The experimental results indicate that such methods may be used to complement values obtained from detailed current theoretical calculations, even for extensively studied gases such as helium. Absolute gain values for several of the weaker He–Ne visible laser transitions were also determined.

© 1971 Optical Society of America

Time variation of the concentration of helium metastable atoms in He-Kr⁺ ion laser

Isamu Kato, Akira Iwasaki, Akifumi Yonehara, and Tsukasa Shimizu
J. Opt. Soc. Am. 69(1) 175-177 (1979)

Radiative Lifetimes of N ii Using N₂⁺ and N⁺ Beams Incident on a Helium Gaseous Target*

Warren B. McCrocklin and Charles E. Head
J. Opt. Soc. Am. 61(5) 619-625 (1971)

Method of Incorporating Cascade Decay Curves into Atomic-Transition-Probability Measurements

J. L. Kohl, L. J. Curtis, R. M. Schectman, and D. A. Chojnacki
J. Opt. Soc. Am. 61(12) 1656-1659 (1971)

Experimental Transition Probabilities for the Ar i 4s–4p Array

J. B. Shumaker and C. H. Popenoe
J. Opt. Soc. Am. 57(1) 8-10 (1967)

Spectroscopic Study of the Early Afterglow in Helium: Visible Bands and Hopfield Continuum*

Don Villarejo, Ronald R. Herm, and Mark G. Inghram
J. Opt. Soc. Am. 56(11) 1574-1584 (1966)