Electron traps in irradiated alkaline glasses at 77 K studied by stimulated luminescence. [Gamma rays]
The results of stimulated luminescence studies at 77/sup 0/K on photoionized tryptophan or tyrosine in alkaline ices or on ..gamma..-irradiated alkaline ices reveal that (1) the luminescence emission results from neutralization of bleached electrons with parent cations whose concentration is much more dilute (10/sup -5/--10/sup -3/M) than that of the alkaline ions (10M); (2) spatial heterogeneous distribution of OH/sup -/ exists prior to irradiation in alkaline ices. There are zones where OH/sup -/ concentration is higher than in others; (3) complementary to the optical absorption and ESR techniques, the stimulated luminescence method can serve to identify negative species other than solvated electrons stabilized in alkaline ices, namely, H/sup -/ and possibly O/sup .
- Research Organization:
- E. R. CNRS 98, Universite Paris-Sud, 91405 Orsay, France
- OSTI ID:
- 7219931
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:5; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400600* -- Radiation Chemistry
AMINO ACIDS
AZOLES
CARBOXYLIC ACIDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
GAMMA RADIATION
GLASS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROXY ACIDS
INDOLES
IONIZING RADIATIONS
LEPTONS
LUMINESCENCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYRROLES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
SOLVATED ELECTRONS
TRYPTOPHAN
TYROSINE