Experimental confirmation of photon-induced spin-flip transitions in helium via triplet metastable yield spectra
2010 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 81, no 6, 062510- p.Article in journal (Refereed) Published
Doubly excited states below the N = 2 ionization threshold are populated by exciting helium atoms in a supersonic beam with monochromatized synchrotron radiation. The fluorescence decay of these states triggers a radiative cascade back to the ground state with large probability to populate long lived singlet and triplet helium metastable states. The yield of metastables is measured using a multichannel plate detector after the beam has passed a singlet-quenching discharge lamp. The variation of the yield observed with the lamp switched on or off is related to the triplet-singlet mixing of the doubly excited states.
Place, publisher, year, edition, pages
2010. Vol. 81, no 6, 062510- p.
IdentifiersURN: urn:nbn:se:uu:diva-147308DOI: 10.1103/PhysRevA.81.062510ISI: 000279143100002OAI: oai:DiVA.org:uu-147308DiVA: diva2:400140