Radiophotoluminescence of Biphenyl in Methylcyclohexane Glass

Deroulede, A.; Kieffer, F.

doi:10.1038/2151475a0

Cited by 12 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The large activation energy for Ag 2+ may originate from the fact that the holes are initially at the PO 4 tetrahedra and subsequently transfer to Ag + to form Ag 2+ . 16,17) On the other hand, Ag 0 is formed above 100 K, and the activation energy is 20 meV. The thermal energy at 100 K is about 8.6 meV, which is smaller than the activation energy.…”

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Analysis of radiophotoluminescence center formation mechanism in Ag-doped phosphate glasses

Kawamoto

Fujimoto

Koshimizu

et al. 2018

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Ag-doped phosphate glasses have widely been used as radiophotoluminescence (RPL) dosimeters. However, the RPL center formation process is not fully understood. In this study, we investigated the RPL center formation process in Ag-doped Na-Al phosphate glasses. We observed that two RPL centers (Ag 0 and Ag 2+ ) were formed at temperatures higher than 100 and 250 K, respectively. In addition, activation energies of their formation were estimated to be 20 and 267 meV, respectively. These results suggest that the electron transfer process is not a simple thermally activated process.

show abstract

Section: Resultsmentioning

confidence: 91%

“…16) In addition to inorganic materials, some organic materials possessing RPL properties have also been reported. These include biphenyl in methylcyclohexane glasses 17) and anthracene and chloranil-doped poly(methylmethacrylate). 18) Amongst these materials, Agdoped phosphate glasses have especially been used in RPL dosimeter.…”

Section: Introductionmentioning

confidence: 99%

Analysis of radiophotoluminescence center formation mechanism in Ag-doped phosphate glasses

Kawamoto

Fujimoto

Koshimizu

et al. 2018

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

La luminescence différée du styrène en solution vitreuse dans le méthylcyclohexane

Hayashi

Deroulede

Kieffer

1969

J. Polym. Sci. A‐1 Polym. Chem.

View full text Add to dashboard Cite

The trapping of electrons and styrene cations and anions has been studied in a methylcyclohexane glass by the techniques of deferred luminescence. Radiothermoluminescence curves consist of two peaks, at 90 and 95°K, in this matrix. The second peak increases linearly with styrene concentration up to 2 × 10−2M when it reaches a constant value, whereas the first peak increases from 10−4 to 10−3M and then decreases at higher concentrations and is not discernible at concentrations above 10−2M. We propose two mechanisms which are qualitatively consistent with this behavior and are based essentially on the recombination of styrene cations with thermally detrapped electrons in the first peak and with anions in the second peak. Photothermoluminescence (i.e., thermoluminescence after photoionization with ultraviolet light) similarly consists of the 90 and 95°K peaks for a 10−3M solution and of the 95° peak alone for a 10−d M solution. Radiophotoluminescence excitation spectra at 77°K, corresponding to absorption spectra of trapped electrons and styrene anions, show that anions are the predominant negative species in 10−2 molar solution, and trapped electrons in 10−3 molar solution. Spectral analysis of radiothermoluminescenece shows the presence of two emission bands, one of which is identical with styrene fluorescence excited by the 254 Nm mercury line (λmax = 292, 302, 307, and 317 Nm). The other band has three fairly poorly resolved maxima at 474, 486 and 496 nm and seems to correspond to the fluorescence of C6H5ĊH‐CH3 radicals formed during radiolysis.

show abstract

Sur le sort des ions et des électrons formés par photoionisation de molécules organiques en milieu rigide

Bernas¹,

Gauthier-Bodard²,

Grand³

et al. 1969

International Journal for Radiation Physics and Chemistry

View full text Add to dashboard Cite

Radiophotoluminescence of Biphenyl in Methylcyclohexane Glass

Cited by 12 publications

References 6 publications

Analysis of radiophotoluminescence center formation mechanism in Ag-doped phosphate glasses

Analysis of radiophotoluminescence center formation mechanism in Ag-doped phosphate glasses

La luminescence différée du styrène en solution vitreuse dans le méthylcyclohexane

Sur le sort des ions et des électrons formés par photoionisation de molécules organiques en milieu rigide

Contact Info

Product

Resources

About