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Träfflista för sökning "WFRF:(Reinhed P.) srt2:(2020-2023)"

Sökning: WFRF:(Reinhed P.) > (2020-2023)

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1.
  • Hartman, Henrik, et al. (författare)
  • Negative ion relaxation and reactions in a cryogenic storage ring
  • 2020
  • Ingår i: Journal of Physics: Conference Series Vol 1412. - : IOP Publishing. - 1742-6588 .- 1742-6596.
  • Konferensbidrag (refereegranskat)abstract
    • An overview of recent experimental results of studies of negative atomic and molecular ions in the Double ElectroStatic Ion-Ring ExpEriment, DESIREE is given. Metastable level lifetimes in atomic negative ions have been measured by time-dependent laser photodetachment. Rotational relaxation of diatomic anions is studied by near-threshold photodetachment. Spontaneous decays of small metal cluster anions by electron emission and fragmentation is studied with decay-channel specificity. Finally, mutual neutralisation of pairs of negative and positive ions has been investigated with initial and final state selectivity.
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2.
  • Najeeb, P. K., 1986-, et al. (författare)
  • Stability and Cooling of the C72- Dianion
  • 2023
  • Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 131:11
  • Tidskriftsartikel (refereegranskat)abstract
    • We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.
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3.
  • Najeeb, P. K., 1986-, et al. (författare)
  • Stability and Cooling of the C2−7 Dianion
  • 2023
  • Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 131:11
  • Tidskriftsartikel (refereegranskat)abstract
    • We have studied the stability of the smallest long-lived all carbon molecular dianion () in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes—6 orders of magnitude longer than established from earlier experiments on . This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for →+e− separation.
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  • Resultat 1-3 av 3

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