Picosecond non-radiative relaxation via internal conversion in Ca10(PO4)F2:Cr

Wells, Jon-Paul R. and Han, Thomas P J (2014) Picosecond non-radiative relaxation via internal conversion in Ca10(PO4)F2:Cr. Materials Research Express, 1 (2). 025706. ISSN 2053-1591 (https://doi.org/10.1088/2053-1591/1/2/025706)

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Abstract

We use a femtosecond pump-probe technique to directly measure fast nonradiative relaxation following excitation of the 3A 23T1 transition in Ca10(PO4)6 F2(CFAP) doped with tetravalent chromium. We measure a 3T1 relaxation time of 137 ps at 10 K which decreases to 37 ps at room temperature through internal conversion directly to the 3A2 ground state. We find rates for quantum mechanical tunnelling and phonon assisted barrier hopping of 0 = 7.9 109 Hz and W1 = 3.4 1011 Hz respectively, with a barrier height of 630 cm-1.

ORCID iDs

Wells, Jon-Paul R. and Han, Thomas P J ORCID logoORCID: https://orcid.org/0000-0002-2303-6861;
  • Item type:Article
    ID code:50904
    Dates:
    Date
    Event
    7 May 2014
    Published
    8 April 2014
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:06 Jan 2015 11:41
    Last modified:11 Nov 2024 10:54
    URI:https://strathprints.strath.ac.uk/id/eprint/50904
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