Absorption spectrum of trapped electrons in rhamnose single crystals x irradiated at 4 K

1982 ◽  
Vol 76 (11) ◽  
pp. 5647-5648 ◽  
Author(s):  
A. S. W. Li ◽  
Larry Kevan ◽  
T. Fujimura
Keyword(s):  
Absorption Spectrum ◽  
Single Crystals ◽  
Trapped Electrons

Trapped electrons in irradiated single crystals of polyhydroxy compounds

1979 ◽  
Vol 70 (3) ◽  
pp. 1320-1325 ◽  
Author(s):  
Harold C. Box ◽  
Edwin E. Budzinski ◽  
Harold G. Freund ◽  
William R. Potter
Keyword(s):  
Single Crystals ◽  
Trapped Electrons ◽  
Polyhydroxy Compounds

Comparison of photoconductivity and optical absorption spectra of trapped electrons in γ-irradiated 2,2,4-trimethylpentane/2,2-dimethylbutane/2-methyltetrahydrofuran mixture glasses at 77 K

1984 ◽  
Vol 62 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Toyoaki Kimura ◽  
Kazunobu Hirao ◽  
Naoto Okabe ◽  
Kenji Fueki
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Electron Mobility ◽  
Optical Absorption Spectrum ◽  
Lower Energy ◽  
Photon Absorption ◽  
Optical Absorption Spectra ◽  
Absorption Process ◽  
Trapped Electrons

Optical absorption and photoconductivity spectra of trapped electrons in -γ-irradiated 2,2,4-trimethylpentane (TMP)/2,2-dimethylbutane (DMB)/2-methyltetrahydrofuran (MTHF) mixture glasses at 77 K have been measured. It is found that the magnitude of the photocurrent increases with decreasing MTHF concentration, which is ascribed to the increase in electron mobility with decreasing MTHF concentration in TMP/DMB/MTHF systems. It is also found that the photoconductivity spectra shift to the lower energy side with decreasing MTHF concentration. Although the photoconductivity spectrum in the neat MTHF system is separated from the corresponding optical absorption spectrum, the spectrum becomes closer to the latter with decreasing MTHF concentration in TMP/DMB/MTHF systems. This result indicates that the extent of bound–free transitions increases relative to bound–bound transitions with decreasing MTHF concentration for the photon absorption process of trapped electrons in TMP/DMB/MTHF systems.

Thermoluminescence of irradiated ammonium perchlorate crystals

1976 ◽  
Vol 54 (7) ◽  
pp. 766-770 ◽  
Author(s):  
S. Radhakrishna ◽  
M. Riggin ◽  
P. W. Whippey ◽  
P. W. M. Jacobs
Keyword(s):  
Absorption Spectrum ◽  
Single Crystals ◽  
Heating Rate ◽  
Ammonium Perchlorate ◽  
Uv Light ◽  
High Energy ◽  
X Rays ◽  
Spectroscopic Evidence ◽  
Additional Peak ◽  
High Energy Electrons

The thermoluminescence of single crystals of ammonium perchlorate irradiated with X rays, uv light, or high energy electrons has been measured between 80 and 420 K. With a heating rate of 5 K/min. prominent peaks occur at 95, 113, 134, 246, and 320 K; an additional peak is found at 347 K after longer irradiation times. The absorption spectrum of uv-irradiated ammonium perchlorate has also been measured and shows bands at 300, 360, and 610 nm. A comparison of these data with chemical and spectroscopic evidence obtained by other workers has permitted the probable identification of ClO3−, ClO−, ClO2, and F centres as radiation products. Three thermoluminescent peaks remain unassigned.

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