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Träfflista för sökning "WFRF:(Misra A) srt2:(2005-2009)"

Search: WFRF:(Misra A) > (2005-2009)

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1.
  • Misra, Deepankar, et al. (author)
  • Two-Center Double-Capture Interference in Fast He2++H2 Collisions
  • 2009
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 102:15, s. 153201-
  • Journal article (peer-reviewed)abstract
    • We report the first observation of Young-type interference effects in a two-electron transfer process. These effects change strongly as the projectile velocity changes in fast (1.2 and 2.0 MeV) He^{2+}-H_2 collisions as manifested in strong variations of the double-electron capture rates with the H_2 orientation. This is consistent with fully quantum mechanical calculations, which ignore sequential electron transfer, and a simple projectile de Broglie wave picture assuming that two-electron transfer probabilities are higher in collisions where the projectile passes close to either one of the H_2 nuclei.
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  • Reinhed, Peter, et al. (author)
  • Precision lifetime measurements of He- in a cryogenic electrostatic ion-beam trap
  • 2009
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 103:21, s. 213002-
  • Journal article (peer-reviewed)abstract
    • We have developed a small purely electrostatic ion-beam trap which may be operated in thermal equilibrium at precisely controlled temperatures down to 10 K. Thus, we avoid magnetic field induced mixing of quantum states and may effectively eliminate any influence from absorption of photons from black-body radiation. We report the first correction free measurements of the lifetimes of the 1s2s2p 4PoJ state of 4He- and the high precision result 359.0±0.7 μs for the J=5/2 level. The lifetimes for the J=3/2 and J=1/2 levels are determined to be 12.3±0.5 and 7.8±1.0 μs, respectively.
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  • Result 1-4 of 4

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