RADIOTHERMOLUMINESCENCE OF POLYETHYLENE AND DISAPPEARANCE OF FREE RADICALS

Journal Article · Fri Mar 01 04:00:00 EST 1963 · Bulletin of the Institute for Chemical Research, Kyoto University (Japan)

OSTI ID:4714807

Shiomi, N; Tahira, S; Yoshida, H; Higashimura, T

Polyethylene sheet was cooled down to 77 deg K and irradiated by 1.5 Mev electron beam. After receiving a dose of 5 x 10/sup 7/ r, the temperature was raised saw-toothwise and the intensity of thermoiuminescence glow and the concentration of surviving free radicals were measured at respective stages. The correlation of the intensity of thermoluminescence glow with the disappearance of free radicals at the respective temperatures was examined. The alpha and BETA peaks of thermoluminescence glow curve showed no correlation with the disappearance of free radicals but the gamma peak showed remarkable dependence upon the disappearance. Dose dependences of the thermoluminescence glow and that of the free radical concentration were studied from 10/sup 5/ r to 10/sup 7/ r and the former showed saturation at 10/sup 6/ r while the latter does not saturate over this dose range. It was found that thermoluminescence has no direct correlation with the radical disappearance. It is conciuded that thermoluminescence is ascribed to the release of energy stored which is resulted from a intra- or intermolecular motion. (auth)

• Research Organization: Kyoto Univ.
• NSA Number: NSA-17-027428
• OSTI ID: 4714807
• Journal Information: Bulletin of the Institute for Chemical Research, Kyoto University (Japan), Journal Name: Bulletin of the Institute for Chemical Research, Kyoto University (Japan) Vol. Vol: 41; ISSN BICRA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
DIAGRAMS
ELECTRON BEAMS
ETHYLENE
FREE RADICALS
LUMINESCENCE
MEASURED VALUES
RADIATION CHEMISTRY
RADIATION DOSES
REACTION KINETICS
TEMPERATURE