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    Luminescence spectroscopy of atomic zinc in solid rare gases. II. Temperature dependence

    Bracken, Veronica A. and Kerins, Paul and Gurtler, Peter and McCaffrey, John G. (1997) Luminescence spectroscopy of atomic zinc in solid rare gases. II. Temperature dependence. Journal of Chemical Physics, 107 (14). pp. 5300-5309. ISSN 0021-9606

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    The temperature dependence of the pairs of emission bands present for atomic zinc isolated in annealed solid argon, krypton, and xenon samples is examined in steady-state and time-resolved luminescence spectroscopy. The pairs of emission bands in all the Zn/RG systems exhibited a reversible temperature dependence whereby the intensity of the high-energy band decreased, while the low-energy band gained in intensity with increasing temperature. In the Zn/Ar system, the decrease in the intensity of the 218.9 nm emission band observed between 9 and 28 K was coupled with a concomitant increase in the intensity of the band at 238 nm. In this temperature range the decay times of the 218.9 nm band decreased while the 238 nm band exhibited a constant decay time of 1.41 ns and a rise time correlated with the decay of the 218.9 nm band. The interdependence exhibited by the intensities and decay times of the two emission bands is modeled by an activated nonradiative process with a barrier height of 130.6 cm−1 for population interconversion between the pairs of emitting levels on of the spin singlet adiabatic potential energy surface. Similar behavior was observed in Zn/Kr between 6.3 to 20 K, but at higher temperatures this system also exhibited enhanced intersystem crossing. Likewise, for Zn/Xe, the low-energy 399 nm emission increased in intensity at the expense of the high-energy 356 nm emission up to a temperature of 40 K. For the Zn/Kr pair of singlet emissions and the Zn/Xe pair of triplet emissions, barrier heights of 78.1 and 42.6 cm−1 were evaluated, respectively.

    Item Type: Article
    Keywords: Noble gases; Emission spectroscopy; Luminescence spectroscopy; atomic zinc; solid rare gases;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 7865
    Identification Number:
    Depositing User: Dr. John McCaffrey
    Date Deposited: 03 Feb 2017 17:11
    Journal or Publication Title: Journal of Chemical Physics
    Publisher: American Institute of Physics
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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