Strong Tl--Hg band emission at 4590 and 6560 A via electron beam initiated discharges in TlI and Hg mixtures

Journal Article · Tue Apr 15 04:00:00 EST 1980 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.439696· OSTI ID:5392631

Schlie, L A; Jusinski, L E; Rathge, R D; Hamil, R A; Drummond, D L

Very strong Tl--Hg excimer band emission at 4590 (B /sup 2/..sigma../sub 1/2/--X/sub 1/2/) and 6560 A (B /sup 2/..sigma../sub 1/2/--X/sub 3/2/) has been observed from stable glow discharges produced in TlI and Hg mixtures via a 20 nsec electron beam pulse. Hg densities up to 5 x 10/sup 19//cm/sup 3/ and peak TlI densities of 10/sup 17//cm/sup 3/ were used at a maximum operating temperatures of 550/sup 0/C. Peak power loading of 34 kW/cm/sup 3/ at 7 A/cm/sup 2/ and E/N values up to 3 x 10/sup -16/ Vx cm/sup 2/ have been achieved in a 60 cm/sup 3/ active volume. The discharges are much more stable and repeatable than similar discharges in TlI and Xe mixtures. The Tl--Hg band emission totally dominates the spectrum that also exhibits Tl and Hg atomic emission plus weaker HgI (B /sup 2/..sigma../sub 1/2/--X/sub 1/2/) emission at 4430 A. A plausible kinetic model for the dominant processes is presented and the potential of this systme as a TlHg laser at 4590 and 6560 A are discussed.

• Research Organization: Air Force Weapons Laboratory, Kirtland Air Force Base, New Mexico 87117
• OSTI ID: 5392631
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

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