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<p>X-ray fluorescence yield (FY) is a useful mode to collect signals for soft X-ray absorption spectroscopy (XAS). Despite its bulk-sensitive nature, use of FY for L-edge XAS of 3d transition metal (TM) oxides (TMOs) is limited by a severe signal suppression or even anti-resonance at low-energy region. Although such abnormal decrease in intensity is often called a “self”-absorption or over-absorption effect, this paper provides experimental data and interpretation to support that such an anti-resonance concentrated at low-energy region originates from a combinational effect of a destructive interference of O fluorescence and the total angular momentum-dependent suppression of TM fluorescence emission channel.</p>

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Apparent self-absorption effect: anomalous anti-resonance in soft X-ray fluorescence spectroscopy

  • 期刊论文

  • 发表日期：

    2025年3月21日

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  • Deok-Yong Cho,
  • Byeong-Gyu Park,
  • Jae-Young Kim

摘要

X-ray fluorescence yield (FY) is a useful mode to collect signals for soft X-ray absorption spectroscopy (XAS). Despite its bulk-sensitive nature, use of FY for L-edge XAS of 3d transition metal (TM) oxides (TMOs) is limited by a severe signal suppression or even anti-resonance at low-energy region. Although such abnormal decrease in intensity is often called a “self”-absorption or over-absorption effect, this paper provides experimental data and interpretation to support that such an anti-resonance concentrated at low-energy region originates from a combinational effect of a destructive interference of O fluorescence and the total angular momentum-dependent suppression of TM fluorescence emission channel.