Science

Light-pulse pairs reveal the femtosecond decay of an inner-shell hole in xenon atoms

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 10/11/2026, 02:25:25 UTC.

Briefings

Researchers at the UVSOR Synchrotron Facility and partner institutions observed the femtosecond decay of a xenon 4d core hole using phase-coherent extreme ultraviolet pulses. The interference fringes showed rapid contrast loss over a few femtoseconds, matching a model based on literature core-hole lifetimes of approximately 6 femtoseconds. The findings were published in Physical Review A.

Key points

• Researchers at the UVSOR Synchrotron Facility and partner institutions observed the femtosecond decay of a xenon 4d core hole using phase-coherent extreme ultraviolet pulses.
• The interference fringes showed rapid contrast loss over a few femtoseconds, matching a model based on literature core-hole lifetimes of approximately 6 femtoseconds.

Context

This study provides direct experimental evidence of inner-shell hole decay in xenon atoms, confirming theoretical models of core-hole lifetimes through time-domain measurements of photoelectron wave packet interference.

Limitations

The evidence is limited to a single experiment from 2026-11-10. The specific city or region of the UVSOR facility is not identified in the source, and the study does not report on broader implications or future predictions beyond the observed decay.

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