Výsledky vyhledávání - "A. G. Kozakiewicz"

Common features of thermoluminescence in NaCl and LiF crystals

Autor: J. D. Comins, A.T. Davidson, A. G. Kozakiewicz, Trevor E. Derry, L. Valberg, M. Suszynska, P.D. Townsend

Publikováno v: physica status solidi c. 4:1044-1047

We review our work on the thermoluminescent properties of LiF and NaCl crystals. The role of impurities and their effect on glow curves is considered. A spectral analysis of light emitted at glow peaks suggests some common processes active in the two

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed4d435d9b1da4f96c13952f39bc0b80
https://doi.org/10.1002/pssc.200673852

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Thermoluminescence of LiF and F 2 color centers

Autor: Giuseppe Baldacchini, R. M. Montereali, A.T. Davidson, A. P. Voitovich, A. G. Kozakiewicz, V. S. Kalinov, Enrico Nichelatti

Publikováno v: physica status solidi c. 4:972-975

Light emitted when heating crystalline materials previously exposed to ionizing radiation is commonly known as thermoluminescence. The resultant glow curve is related to the material, the impurities and the defect centers generated by the irradiation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0054f74ce2432f98c0d39edca5e131e3
https://doi.org/10.1002/pssc.200673743

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The effect of impurities on TL emission wavelengths of NaCl crystals

Autor: Trevor E. Derry, A. G. Kozakiewicz, J. D. Comins, L. Valberg, P.D. Townsend, M. Suszynska, A.T. Davidson

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 250:354-358

We report emission spectra during thermoluminescence of NaCl crystals doped with Eu, Sr, Ca, Cr and Ni impurities. Crystals were irradiated at ambient temperature with X- or γ-rays prior to measurement. Isometric plots in the wavelength range 200–

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4bb89fd27b945e6834327d120a862565
https://doi.org/10.1016/j.nimb.2006.04.137

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Spectral analysis of TL emission from pure and Eu‐doped NaCl crystals

Autor: Trevor E. Derry, A. G. Kozakiewicz, P.D. Townsend, M. Suszynska, J. D. Comins, L. Valberg, A.T. Davidson

Publikováno v: physica status solidi (c). 2:444-448

We have measured emission spectra during thermoluminescence of pure and europium-doped NaCl crystals following irradiation at ambient temperature with X- and γ-rays. Factors investigated include the effect of pre-irradiation annealing of crystals an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ccc5f00eec1656fcbcb36fbc795b18c4
https://doi.org/10.1002/pssc.200460203

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Visible and VUV optical absorption studies of Mg-colloids and colour centres in MgF2 crystals implanted by 100 keV Mg-ions

Autor: D. S. Mclachlan, George Amolo, Trevor E. Derry, J. D. Comins, A. G. Kozakiewicz, A.T. Davidson

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 218:244-248

keV Mg ions have been implanted into MgF2 crystals with a fluence of 10 17 ions/cm 2 at liquid nitrogen tem- perature. After warming to room temperature optical absorption measurements over the range 2.0-11.5 eV revealed F- type centres in the visibl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2c69357d161e7b8d1e940db35571789
https://doi.org/10.1016/j.nimb.2003.12.075

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Effects of various dopants on NaCl and KCl glow curves

Autor: M. Suszynska, J. D. Comins, Trevor E. Derry, A. G. Kozakiewicz, A.T. Davidson

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 218:249-254

We have measured the thermoluminescence of a number of NaCl and KCl crystals following irradiation at ambient temperature with the same dose (10 kGy) of Co-60 γ rays. We compare the TL of pure samples and of samples doped with europium and calcium i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b310b5e83afc585fdf83148e31930542
https://doi.org/10.1016/j.nimb.2004.01.010

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Fast heavy ion induced VUV absorption in LiF crystals

Autor: J. D. Comins, K. Schwartz, A. G. Kozakiewicz, A.T. Davidson, Christina Trautmann

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 191:212-215

LiF crystals were irradiated with various heavy ions (Ni, Zn, Au, Pb and U) with a specific energy 2–11 MeV/u and a fluence between 1010 and 1012 ions/cm2. Spectroscopic absorption studies were performed in the wavelength range 100–700 nm. In all

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9ccebd849b635c94cc575c0d8637b14
https://doi.org/10.1016/s0168-583x(02)00561-x

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VUV optical absorption in sapphire crystals following implantation with 100 keV O+, Al+ and Cr+ Ions

Autor: A.T. Davidson, Trevor E. Derry, A. G. Kozakiewicz

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 191:582-585

We report optical absorption (OA) measurements in Al2O3 crystals following implantation with O+, Al+ and Cr+ ions of 100 keV energy. Fluences were between 4×1015 and 1×1017 ions/cm2 and the wavelength range was 150–350 nm. The vacuum ultraviolet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfae8fe14e1e360a2fe2ea5d3a0190df
https://doi.org/10.1016/s0168-583x(02)00614-6

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The colouration of CaF 2 crystals by keV AND GeV ions

Autor: J. D. Comins, A. G. Kozakiewicz, A.T. Davidson, Trevor E. Derry, Christina Trautmann, K. Schwartz

Publikováno v: Radiation Effects and Defects in Solids. 157:637-641

CaF 2 crystals have been implanted with a variety of ions of widely different energies and mass. Effects have been monitored using optical absorption in the range 120-750 v nm. This includes the vacuum UV region. For 100 v keV ions (Al, Mg, Kr) we ob

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fc21db2021b634a7f655a978f871d95
https://doi.org/10.1080/10420150215811

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The colouration by 60 Co-gamma rays of NaCl and KCl crystals doped with europium ions

Autor: M. Suszynska, Trevor E. Derry, J. D. Comins, A. G. Kozakiewicz, A.T. Davidson

Publikováno v: Radiation Effects and Defects in Solids. 157:629-636

Pure and europium doped NaCl and KCl crystals have been irradiated with 60 Co gamma rays and with ultraviolet light. The dose was 10 v kGy and temperatures during irradiation were ambient and liquid nitrogen. The effects of irradiation are determined

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24ef32004fbadb9a93b3cf215ce3f776
https://doi.org/10.1080/10420150215750

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