Thermally stimulated luminescence studies of x-irradiated L-alanine: Cr/sup 3 +/ single crystals
Thermally stimulated luminescence studies of x-irradiated L-alanine: Cr/sup 3 +/ have been conducted in the interval 10--300 K. Glow peaks were observed at 42, 60, 72, 148, and 208 K. The 148 K peak has been previously reported, while the one at 208 K was of insufficient intensity to study. Also, the 60 K peak was difficult to analyze due to overlap with the neighboring peaks. Detailed analyses of the 42 and 72 K peaks yielded, respectively, the following parameters: E = 24 meV, s = 5.3 s/sup -1/, and l = 1; E = 180 meV, s = 2.4 x 10/sup 10/ s/sup -1/, and l = 2.8, where l is the kinetics order. Identical emission was observed from each peak, characterized by a maximum at 445 nm with FWHM equal to 0.605 eV. A tentative model is presented to explain these results in terms of detrapping and deexcitation via the excited singlet and triplet states.
- Research Organization:
- Department of Physics, Memphis State University, Memphis, Tennessee 38152
- OSTI ID:
- 6158281
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 78:11; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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CHEMICAL RADIATION EFFECTS
CHEMISTRY
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
LUMINESCENCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
X RADIATION