Fine and hyperfine structure spectra of the ultra-violet 2 3S → 5 3P transition in 4He and 3He with a frequency doubled CW ring laser, detected via associative ionization

doi:10.1016/0030-4018(82)90087-6

Optics Communications

Volume 42, Issue 1, 1 June 1982, Pages 45-50

https://doi.org/10.1016/0030-4018(82)90087-6 Get rights and content

Abstract

High resolution laser spectroscopy coupled to a sensitive method of detection via mass analysis of He⁺₂ ions produced in $He(5^{3} P) + He(1^{1} S)$ collisions, is used to obtain the fine and hyperfine spectra of the ultra-violet He 2 ³S → 5 ³P transition. A cw tunable UV radiation around 294.5 nm is generated by intracavity frequency doubling a Rhodamine 6G single mode ring dye laser using an ADA crystal. Both spectra enable fine and hyperfine structures to be determined within a few MHz. The magnetic dipole coupling constant A of the 5 ³P term of ³He is found to be -4326 ± 9 MHz (-0.1443 ± 0.0003 cm^-1).

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Fine and hyperfine structure spectra of the ultra-violet 2 3S → 5 3P transition in 4He and 3He with a frequency doubled CW ring laser, detected via associative ionization

Abstract

Optics Comm.

Optics Comm.

Optics Comm.

Optics Comm.

Phys. Rev.

Phys. Rev.

J. Phys.

C.R. Acad. Sci.

C.R. Acad. Sci.

J. Opt. Soc. Am.

Phys. Rev.

Fine and hyperfine structure spectra of the ultra-violet 2 ³S → 5 ³P transition in ⁴He and ³He with a frequency doubled CW ring laser, detected via associative ionization