Branching ratios in the radiative decay of helium doubly excited states (Articolo in rivista)

Type
Label
  • Branching ratios in the radiative decay of helium doubly excited states (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevA.72.052512 (literal)
Alternative label
  • M. Coreno,1,3; K. C. Prince,2,3; R. Richter,2; M. de Simone,3; K. Bucar,4; M. Zitnik4 (2005)
    Branching ratios in the radiative decay of helium doubly excited states
    in Physical review. A
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Coreno,1,3; K. C. Prince,2,3; R. Richter,2; M. de Simone,3; K. Bucar,4; M. Zitnik4 (literal)
Pagina inizio
  • 052512 (literal)
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  • PACS number(s): 32.70.Cs, 32.50.+d (literal)
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  • 72 (literal)
Rivista
Note
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
  • Google Scholar (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1CNR-IMIP, Area della Ricerca di Roma 1, Montelibretti (Rome), I-00016 Italy 2Sincrotrone Trieste, in Area Science Park, I-34012 Basovizza (Trieste), Italy 3CNR-Laboratori TASC-INFM, in Area Science Park, Loc. Basovizza, I-34012 Trieste, Italy 4J. Stefan Institute, 1000 Ljubljana, Slovenia (literal)
Titolo
  • Branching ratios in the radiative decay of helium doubly excited states (literal)
Abstract
  • The doubly excited singlet states of He below the N=2 threshold may decay by autoionization or fluorescence. In the fluorescence decay channel, most decay cascades consist of emission of three photons, of which the first is a VUV photon, the second is in or near the visible range, and the last is another VUV photon. We have studied the fluorescence channel decay dynamics of the ?2,0n?, ?2,1n? and ?2,-1n? 1P, n=3-7, states by wavelength dispersed photon-induced fluorescence spectroscopy. We have detected the photons in the second step of the cascade and determined the branching ratios for the strongest lines in this step. From these data we are able to calculate the branching ratios of the first step in the cascade. The results are in good agreement with calculations of the main decay channels of the higher resonances, but about 20-30 % lower, and so we are able to describe quantitatively the whole fluorescence cascade of the above-mentioned doubly excited states. (literal)
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