title: Magnetic-field induced enhancement in the fluorescence yield spectrum of doubly excited states in helium.
abstract: An influence of static magnetic fields on the fluorescence yield spectrum of He in the vicinity of the N = 2 thresholds has been observed. The experimental results are in excellent agreement with predictions based on multichannel quantum defect theory, and it is demonstrated that the Rydberg electron l mixing due to the diamagnetic interaction is essential for the description of the observed fluorescence yield intensity enhancement.
authors.affiliation: Department of Physics, Uppsala University, Box 530, S-75121 Uppsala, Sweden.
authors.forename: Magnus
authors.initials: M
authors.lastname: Ström
authors.forename: Conny
authors.initials: C
authors.lastname: Såthe
authors.forename: Marcus
authors.initials: M
authors.lastname: Agåker
authors.forename: Johan
authors.initials: J
authors.lastname: Söderström
authors.forename: Jan-Erik
authors.initials: JE
authors.lastname: Rubensson
authors.forename: Stefano
authors.initials: S
authors.lastname: Stranges
authors.forename: Robert
authors.initials: R
authors.lastname: Richter
authors.forename: Michele
authors.initials: M
authors.lastname: Alagia
authors.forename: T W
authors.initials: TW
authors.lastname: Gorczyca
authors.forename: F
authors.initials: F
authors.lastname: Robicheaux