Mechanism of thermoluminescence in magnesium oxide
Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of tra...
Ausführliche Beschreibung
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Englisch |
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1978 |
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8 |
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Springer Online Journal Archives 1860-2002 |
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in: Journal of materials science - 1966, 13(1978) vom: Dez., Seite 2637-2644 |
Übergeordnetes Werk: |
volume:13 ; year:1978 ; month:12 ; pages:2637-2644 ; extent:8 |
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NLEJ194543684 |
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520 | |a Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. | ||
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(DE-627)NLEJ194543684 DE-627 ger DE-627 rakwb eng Mechanism of thermoluminescence in magnesium oxide 1978 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. Springer Online Journal Archives 1860-2002 Sathyamoorthy, A. oth Luthra, J. M. oth in Journal of materials science 1966 13(1978) vom: Dez., Seite 2637-2644 (DE-627)NLEJ188987134 (DE-600)2015305-3 1573-4803 nnns volume:13 year:1978 month:12 pages:2637-2644 extent:8 http://dx.doi.org/10.1007/BF00552693 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 13 1978 12 2637-2644 8 |
spelling |
(DE-627)NLEJ194543684 DE-627 ger DE-627 rakwb eng Mechanism of thermoluminescence in magnesium oxide 1978 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. Springer Online Journal Archives 1860-2002 Sathyamoorthy, A. oth Luthra, J. M. oth in Journal of materials science 1966 13(1978) vom: Dez., Seite 2637-2644 (DE-627)NLEJ188987134 (DE-600)2015305-3 1573-4803 nnns volume:13 year:1978 month:12 pages:2637-2644 extent:8 http://dx.doi.org/10.1007/BF00552693 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 13 1978 12 2637-2644 8 |
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(DE-627)NLEJ194543684 DE-627 ger DE-627 rakwb eng Mechanism of thermoluminescence in magnesium oxide 1978 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. Springer Online Journal Archives 1860-2002 Sathyamoorthy, A. oth Luthra, J. M. oth in Journal of materials science 1966 13(1978) vom: Dez., Seite 2637-2644 (DE-627)NLEJ188987134 (DE-600)2015305-3 1573-4803 nnns volume:13 year:1978 month:12 pages:2637-2644 extent:8 http://dx.doi.org/10.1007/BF00552693 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 13 1978 12 2637-2644 8 |
allfieldsGer |
(DE-627)NLEJ194543684 DE-627 ger DE-627 rakwb eng Mechanism of thermoluminescence in magnesium oxide 1978 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. Springer Online Journal Archives 1860-2002 Sathyamoorthy, A. oth Luthra, J. M. oth in Journal of materials science 1966 13(1978) vom: Dez., Seite 2637-2644 (DE-627)NLEJ188987134 (DE-600)2015305-3 1573-4803 nnns volume:13 year:1978 month:12 pages:2637-2644 extent:8 http://dx.doi.org/10.1007/BF00552693 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 13 1978 12 2637-2644 8 |
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(DE-627)NLEJ194543684 DE-627 ger DE-627 rakwb eng Mechanism of thermoluminescence in magnesium oxide 1978 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. Springer Online Journal Archives 1860-2002 Sathyamoorthy, A. oth Luthra, J. M. oth in Journal of materials science 1966 13(1978) vom: Dez., Seite 2637-2644 (DE-627)NLEJ188987134 (DE-600)2015305-3 1573-4803 nnns volume:13 year:1978 month:12 pages:2637-2644 extent:8 http://dx.doi.org/10.1007/BF00552693 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 13 1978 12 2637-2644 8 |
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Mechanism of thermoluminescence in magnesium oxide |
abstract |
Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. |
abstractGer |
Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. |
abstract_unstemmed |
Abstract Thermoluminescence (TL) induced by γ-rays in nominally pure polycrystalline MgO powders has been investigated. In addition to a high temperature peak around 650 K, which is also present in the unirradiated specimens, TL glow peaks are observed around 365, 435, 510 and 545 K. The role of transition metal impurities on TL behaviour has been studied by the doping technique. It is observed that Cr3+, Mn2+ and Ni2+ act as emission centres while Fe3+, Co2+ and Cu2+ act as quenchers. For a particular sample all γ-induced glow peaks give a similar emission spectrum which is characteristic of the activators present. Optical bleaching, isothermal decay and ESR studies have been used to study the trapping centres. It is shown that the charge carriers involved are holes from V-type defects. The dominant 365 K peak has been assigned to VM centres. A hole-release mechanism involving recombinations with electrons trapped at activators is proposed to explain the TL behaviour. |
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