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Wavelength-dependent cross section for optically stimulated luminescence in Y[formula omitted]SiO5:Ce.

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Title: Wavelength-dependent cross section for optically stimulated luminescence in Y[formula omitted]SiO5:Ce.
Authors: Warming, Jacob C.1 (AUTHOR) jcwarming@phys.au.dk, Balling, Peter1 (AUTHOR), Turtos, Rosana M.1 (AUTHOR)
Source: Radiation Measurements. Feb2026, Vol. 191, pN.PAG-N.PAG. 1p.
Subjects: Optically stimulated luminescence, Dosimeters, Tunable lasers, Phonons, Absorption cross sections, Wavelength measurement, Activation energy, Phosphors
Abstract: Long-lived defect states in large-band-gap materials can potentially store energy from ionising radiation allowing the materials to be used as dosimeters. The population in many of these dosimetric traps can be read out with optically stimulated luminescence (OSL). OSL is associated with a cross section for the excitation probability, and the wavelength dependence of the cross section provides insight into the physical characteristics of the traps and allows for an optimised readout of OSL-dosimeters. This paper suggests a novel approach to measuring the optical cross section using a pulsed tunable laser. A model of the evolution of the trap population is used to analyse data taken pulse-by-pulse to determine the cross sections in Y 2 SiO 5 :Ce. The cross sections are compared to theoretical models in order to determine the trap depth and phonon contribution. The wavelength-dependent cross section increases monotonically as the wavelength decreases, varying by more than two orders of magnitude from 1 0 − 24 at the longest wavelengths (800 nm) to more than 1 0 − 22 m 2 in the green and blue part of the spectrum. Depending on the theoretical model used, the main trap depth is within the range 2.1–2.6 eV with a characteristic value of 2.3 eV, aligning with published results. Additionally, a notable phonon contribution is found with a magnitude that is consistent with previously reported phonon energies. • Stimulation with a pulsed, tunable laser can be used to find OSL cross sections. • Two types of traps were found in YSO:Ce. • Phonons play a crucial role in exciting electrons from electronic traps. [ABSTRACT FROM AUTHOR]
Copyright of Radiation Measurements is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Wavelength-dependent cross section for optically stimulated luminescence in Y[formula omitted]SiO5:Ce.
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  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Warming%2C+Jacob+C%2E%22">Warming, Jacob C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jcwarming@phys.au.dk</i><br /><searchLink fieldCode="AR" term="%22Balling%2C+Peter%22">Balling, Peter</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Turtos%2C+Rosana+M%2E%22">Turtos, Rosana M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Radiation+Measurements%22">Radiation Measurements</searchLink>. Feb2026, Vol. 191, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Optically+stimulated+luminescence%22">Optically stimulated luminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Dosimeters%22">Dosimeters</searchLink><br /><searchLink fieldCode="DE" term="%22Tunable+lasers%22">Tunable lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Phonons%22">Phonons</searchLink><br /><searchLink fieldCode="DE" term="%22Absorption+cross+sections%22">Absorption cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelength+measurement%22">Wavelength measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Activation+energy%22">Activation energy</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphors%22">Phosphors</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Long-lived defect states in large-band-gap materials can potentially store energy from ionising radiation allowing the materials to be used as dosimeters. The population in many of these dosimetric traps can be read out with optically stimulated luminescence (OSL). OSL is associated with a cross section for the excitation probability, and the wavelength dependence of the cross section provides insight into the physical characteristics of the traps and allows for an optimised readout of OSL-dosimeters. This paper suggests a novel approach to measuring the optical cross section using a pulsed tunable laser. A model of the evolution of the trap population is used to analyse data taken pulse-by-pulse to determine the cross sections in Y 2 SiO 5 :Ce. The cross sections are compared to theoretical models in order to determine the trap depth and phonon contribution. The wavelength-dependent cross section increases monotonically as the wavelength decreases, varying by more than two orders of magnitude from 1 0 − 24 at the longest wavelengths (800 nm) to more than 1 0 − 22 m 2 in the green and blue part of the spectrum. Depending on the theoretical model used, the main trap depth is within the range 2.1–2.6 eV with a characteristic value of 2.3 eV, aligning with published results. Additionally, a notable phonon contribution is found with a magnitude that is consistent with previously reported phonon energies. • Stimulation with a pulsed, tunable laser can be used to find OSL cross sections. • Two types of traps were found in YSO:Ce. • Phonons play a crucial role in exciting electrons from electronic traps. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Radiation Measurements is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.radmeas.2025.107566
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Optically stimulated luminescence
        Type: general
      – SubjectFull: Dosimeters
        Type: general
      – SubjectFull: Tunable lasers
        Type: general
      – SubjectFull: Phonons
        Type: general
      – SubjectFull: Absorption cross sections
        Type: general
      – SubjectFull: Wavelength measurement
        Type: general
      – SubjectFull: Activation energy
        Type: general
      – SubjectFull: Phosphors
        Type: general
    Titles:
      – TitleFull: Wavelength-dependent cross section for optically stimulated luminescence in Y[formula omitted]SiO5:Ce.
        Type: main
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            NameFull: Warming, Jacob C.
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            NameFull: Balling, Peter
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            NameFull: Turtos, Rosana M.
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            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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              Value: 191
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            – TitleFull: Radiation Measurements
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