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In this work, X-ray excited optical luminescence (XEOL) probe was employed to unravel the nonthermal origin green emission from the fabricated Gd2O2S:Tb/PVP scintillator. XEOL mechanism involves the relaxation of core-hole generated after ejection of core electrons (2s/2p) of the rare earth ion as a result of absorption of monochromatic X-ray energy. This process is occurred through cascade of non-radiative decays and energy transfer to the 5D3,4 emitting levels and thereby radiative decay to the ground states of the photoemitter Tb3+ ion. Nevertheless, the XEOL study evidenced that the non-thermal origin green emission is mainly originated from the radiative decay, associated with the 5D4 → 7FJ transitions (J = 6 − 3) of the Tb3+ ion.

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Synchrotron Radiation X-ray Excited Optical Luminescence Probing of Green Emission from Gd2O2S:Tb/PVP Scintillator

  • 会议论文

  • 发表日期：

    2025年

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  • Ruba I. AlZubi,
  • Zahid U. Khan,
  • Allayth Aldrabee,
  • Latif U. Khan

摘要

In this work, X-ray excited optical luminescence (XEOL) probe was employed to unravel the nonthermal origin green emission from the fabricated Gd2O2S:Tb/PVP scintillator. XEOL mechanism involves the relaxation of core-hole generated after ejection of core electrons (2s/2p) of the rare earth ion as a result of absorption of monochromatic X-ray energy. This process is occurred through cascade of non-radiative decays and energy transfer to the 5D3,4 emitting levels and thereby radiative decay to the ground states of the photoemitter Tb3+ ion. Nevertheless, the XEOL study evidenced that the non-thermal origin green emission is mainly originated from the radiative decay, associated with the 5D4 → 7FJ transitions (J = 6 − 3) of the Tb3+ ion.