Trapped electrons studied through stimulated neutralization luminescence
The optically induced or ''stimulated'' neutralization luminescence (SL) following $gamma$ irradiation of rigid matrices can provide two types of information: (1) the emission spectrum characterizes the neutralization process, i.e., the neutralized cation or one of its dissociation fragments; (2) the excitation spectrum gives information on the nature and depths of the electron traps and occasionally on the trapped electrons e$sup -$/sub t/ spatial distribution. Examples of type 2 experiments performed at 77$sup 0$K on crystalline or glassy polar matrices are presented and discussed. The photodetrapping threshold values were found at 2.3 eV for ethanol glasses (lambda/ sub an/ 345 nm) and at 1.9 eV for crystalline H$sub 2$O or D$sub 2$O ices (lambda/ sub an/ 380 nm). No detrapping threshold appears in the SL spectra recorded from $gamma$-irradiated alkaline ices. (auth)
- Research Organization:
- Laboratoire Chimie Physique, Orsay, France
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-019728
- OSTI ID:
- 4094122
- Journal Information:
- J. Phys. Chem., v. 79, no. 26, p. 2974, Journal Name: J. Phys. Chem., v. 79, no. 26, p. 2974; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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