Atomic near-infrared noble gas scintillations II

Solin, Olof; Kronman, D.; Lindblom, Peter; Rosengård, U.; Vuorinen, Kimmo

doi:10.1016/0168-9002(88)90608-0

Cited by 4 publications

(1 citation statement)

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“…Much less attention has been devoted to possible infrared (IR) or near-infrared (NIR) fluorescence, related to transitions between higher lying excited states of the rare-gas dimers in pressurized gas, although some broad bands have been observed in noble gases at intermediate pressure (0.05 < P < 0.5 MPa) [2,22], IR scintillation has been detected in liquefied Ar and Xe [23], and atomic IR scintillation has been revealed in alpha-particle-excited noble gas at low-pressure (10 < P < 50 kPa) [24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Environmental influence on the IR fluorescence of Xe2* molecules in electron beam excited Ar–Xe mixture at high density

et al. 2005

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Abstract. We report new measurements of the near infrared (NIR) Xe * 2 excimer fluorescence in an electronbeam-excited Ar (90%)-Xe (10 %) mixture at room temperature. Previous measurements up to a density N ≈ 2 × 10 26 m −3 discovered a broad excimer fluorescence band at ≈ 7800 cm −1 , whose center is redshifted by increasing N (A. F. Borghesani, G. Bressi, G. Carugno, E. Conti, and D. Iannuzzi, J. Chem. Phys., 115, 6042 (2001) [1]). The shift has been explained by assuming that the energy of the optical active electron in the molecule is shifted by the density-dependent Fermi shift and by accounting for the solvation effect due to the environment. We have extended the density range up to N ≈ 6 × 10 26 m −3 , confirming the previous measurements and extending the validity of the interpretative model. A detailed analysis of the width of the fluorescence band gives a value of 2.85 nm for the size of the investigated excimer state. Such a large value lends credence to the validity of the proposed explanation of the experimental findings.

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Section: Introductionmentioning

confidence: 99%