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Allowed and forbidden transitions of singlet helium high Rydberg states (1985)

Ganguly, B. N. ; Garscadden, Alan

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 57 (1985), S. 4856-4860

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Allowed and forbidden transitions of singlet helium from 2s1S to ns1S, np1P, and nd1D states have been measured between n=8 and 31 by optogalvanic spectroscopy in a dc discharge positive column. The addition of neon in the discharge was found to increase the relative intensities of the forbidden transitions. For similar photon flux, the optogalvanic signal reaches a maximum at n=11 and decreases thereafter. Neutral collisional ionization of the excited states from n=13 and above was found to be responsible for the increased ionization efficiency of the high Rydberg states.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.335462

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