Zobrazeno 1 - 10
of 108
pro vyhledávání: '"J P Spoonhower"'
Publikováno v:
Journal of Luminescence. 101:23-33
The influence of ionizing radiation on the optical properties of various Ge-doped silica glasses in the UV–vis range was examined. Hydrogen-loaded and hydrogen-free germanosilicate glass samples containing varying amounts of oxygen deficiencies wer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::432050d03651b01d44c6e9750f1db3a1
https://doi.org/10.1016/s0022-2313(02)00385-x
https://doi.org/10.1016/s0022-2313(02)00385-x
Publikováno v:
Journal of Physics: Condensed Matter. 12:8309-8319
The relationship between paramagnetic defect centres and UV absorption bands simultaneously generated by ionizing radiation in Ge-doped SiO2 glass is investigated using magneto-optical techniques. A sample of 7.0 mol% Ge-doped SiO2 was exposed to x-r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13ca835d4c17b5fd9d7c980ebe5f332f
https://doi.org/10.1088/0953-8984/12/38/307
https://doi.org/10.1088/0953-8984/12/38/307
Publikováno v:
Journal of Physics: Condensed Matter. 2:3021-3030
ODMR investigations of recombination processes in AgCl have been extended in an effort to reconcile the apparently contradictory interpretations of other workers. The experiments described indicate that for AgCl no single recombination mechanism domi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb3767d633c74d281f16b6fadcda5597
https://doi.org/10.1088/0953-8984/2/13/011
https://doi.org/10.1088/0953-8984/2/13/011
Autor:
R. J. Deri, J. P. Spoonhower
Publikováno v:
The Journal of Chemical Physics. 80:5423-5431
The geometry of Ir3+ ions in AgBr has been investigated by vibrational spectroscopy. The results provide definitive evidence of a distorted IrBr3−6 complex. The nature of the distortion is tetragonal or lower, and probably not trigonal. Details of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a896f5b0b30249071e02f22a1e41c37a
https://doi.org/10.1063/1.446649
https://doi.org/10.1063/1.446649
Autor:
J P Spoonhower, R J Deri
Publikováno v:
Journal of Physics D: Applied Physics. 15:1059-1070
To increase understanding of the effects of doping silver bromide with divalent lead ions, both the photoconductive response and the photoelectron kinetics of doped binderless powder precipitates were studied as a function of exciting wavelength. Exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::915ee95ffbeb81b4daa41c5487f948be
https://doi.org/10.1088/0022-3727/15/6/015
https://doi.org/10.1088/0022-3727/15/6/015
Autor:
J. P. Spoonhower, R. J. Deri
Publikováno v:
Journal of Applied Physics. 57:2806-2811
The room‐temperature photoelectron kinetics in 1.3‐ and 0.4‐μm AgBr octahedral emulsion microcrystals have been investigated for time scales ranging from several nanoseconds to several microseconds after exposure. Two first‐order decay proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30cb8784b589301bd1a3ffb8c746d3ba
https://doi.org/10.1063/1.335425
https://doi.org/10.1063/1.335425
Publikováno v:
physica status solidi (b). 109:645-653
The photoresponse of AgBr binderless powder precipitates doped with Pb2+ and Cd2+ ions is studied near liquid-nitrogen temperature by using microwave cavity techniques. Pb2+- and Cd2+-doped samples have much longer photoelectron lifetimes and higher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c4a429017601022def578491208826d
https://doi.org/10.1002/pssb.2221090223
https://doi.org/10.1002/pssb.2221090223
Autor:
J. P. Spoonhower, R. J. Deri
Publikováno v:
physica status solidi (b). 133:301-313
The kinetics of photogenerated carriers in AgBr crystals doped with trivalent iridium are investigated by photoconductivity measurements. The temperature dependence of the photoelectron lifetime is highly dependent on the level of iridium doping. Exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5a58115c80f14237077a5e4c64eb211
https://doi.org/10.1002/pssb.2221330135
https://doi.org/10.1002/pssb.2221330135
Autor:
J P Spoonhower, R J Deri
Publikováno v:
Journal of Physics D: Applied Physics. 15:1071-1076
Pre-exposure of lead-doped AgBr binderless powder precipitates to several seconds of light greatly enhanced the microwave photoconductivity at 100K. Photon energies both greater and less than the bandgap of pure AgBr could produce such an effect. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c5107345e8e506ab135ed858b173efe
https://doi.org/10.1088/0022-3727/15/6/016
https://doi.org/10.1088/0022-3727/15/6/016
Publikováno v:
Journal of Applied Physics. 57:1968-1970
There is a component of the complex decay of the photoconductivity signal for silver bromide photographic materials that is intermediate in time constant and in temperature dependence between the initial electron trapping and the subsequent ionic pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b004e50babc8d96a7d41014a0f212ea9
https://doi.org/10.1063/1.335466
https://doi.org/10.1063/1.335466