Light Emission from the Dissolution of Gamma Irradiated Alkali Halides in Water

1971 ◽  
Vol 230 (15) ◽  
pp. 160-160
Author(s):  
JAI P. MITTAL
Keyword(s):  
Light Emission ◽  
Alkali Halides ◽  
Gamma Irradiated

Deformation luminescence in gamma-irradiated alkali halides

1989 ◽  
Vol 137 (4-5) ◽  
pp. 213-216 ◽  
Author(s):  
T. Hagihara ◽  
Y. Hayashiuchi ◽  
Y. Kojima ◽  
Y. Yamamoto ◽  
S. Ohwaki ◽  
...  
Keyword(s):  
Alkali Halides ◽  
Gamma Irradiated

Reduction of methylene blue and related dyes by gamma-irradiated alkali halides

1989 ◽  
Vol 131 (1) ◽  
pp. 95-103 ◽  
Author(s):  
H. J. Arnikar ◽  
S. Nilegaonkar ◽  
S. B. Bhosale ◽  
A. H. Kapadi
Keyword(s):  
Methylene Blue ◽  
Alkali Halides ◽  
Gamma Irradiated

The Role of Singlet Oxygen in the Lyoluminescence of Saccharides

1992 ◽  
Vol 47 (3) ◽  
pp. 463-468 ◽  
Author(s):  
E. Pitt ◽  
A. Scharmann ◽  
T. Suprihadi
Keyword(s):  
Amino Acids ◽  
Singlet Oxygen ◽  
Chemical Reaction ◽  
Light Emission ◽  
Alkali Halides ◽  
Peroxyl Radicals ◽  
Emission Centre ◽  
Radiation Induced

Abstract Lyoluminescence, the radiation induced light emission during the dissolution of irradiated solid substances like alkali halides, saccharides, amino acids etc. was proposed as a method of dosimetry. It is established that lyoluminescence is a consequence of a reaction of radicals from radiolysis with oxygen dissolved in the solvent. The role of oxygen in the lyoluminescence of saccharides has been investigated. It has been proved that oxygen is not only necessary for the chemical reaction preceeding the lyoluminescence process, but that it is also the emission centre itself. Singlet oxygen is released from the disproportionation of peroxyl radicals produced during solution. The lyoluminescence emission peaks may be attributed to the simultaneous transitions [ 1Σ g+ ] [ 1Σ g+ ] , [ 1Δg ] [1 Δg ] and [1Σg+] [ 1Δg ] to [3Σg+] [3Σg-] of collisional pairs of singlet oxygen molecules

Aquoluminescence from Gamma-irradiated Alkali Halides

Nature ◽  
1970 ◽  
Vol 228 (5269) ◽  
pp. 357-358 ◽  
Author(s):  
H. J. ARNIKAR ◽  
P. S. DAMLE ◽  
B. D. CHAURE ◽  
B. S. MADHAV RAO
Keyword(s):  
Alkali Halides ◽  
Gamma Irradiated

Positron annihilation in 60Co irradiated alkali halides

1978 ◽  
Vol 56 (12) ◽  
pp. 1527-1530 ◽  
Author(s):  
S. Dannefaer ◽  
D. P. Kerr ◽  
G. W. Dean ◽  
B. G. Hogg
Keyword(s):  
Experimental Data ◽  
Positron Annihilation ◽  
Momentum Distribution ◽  
Positron Lifetime ◽  
Alkali Halides ◽  
Systematic Investigation ◽  
Theoretical Treatment ◽  
Doppler Broadening ◽  
Lifetime Component ◽  
Gamma Irradiated

A systematic investigation of 17 gamma-irradiated alkali halides using positron lifetime and Doppler broadening techniques has been performed. For eight of the alkali halides (NaCl, NaBr, KCl, KBr, KI, RbCl, RbBr, and RbI), a new lifetime with values between 1.0 and 1.3 ns is attributed to positrons trapped in F centres. Despite large F centre concentrations in LiF, LiCl, LiBr, and NaF, no such lifetime component is observed in these samples. Doppler broadening measurements show that in nearly all cases the momentum distribution becomes narrower upon irradiation. The experimental data are discussed in view of a recent theoretical treatment of the positron – F centre problem.

Light emission from gamma-irradiated alkane glasses containing olefins

1971 ◽  
Vol 10 (3) ◽  
pp. 277-279 ◽  
Author(s):  
B. Brocklehurst ◽  
J.S. Robinson
Keyword(s):  
Light Emission ◽  
Gamma Irradiated

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

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