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Related Experiment Videos

Ultrahot electron formation under excess electron drift through solid Xe.

A Usenko1, G Frossati, E B Gordon

  • 1Kamerlingh Onnes Laboratory, Leiden University, Postbox 9504, 2300 RA Leiden, The Netherlands.

Physical Review Letters
|May 7, 2003
PubMed
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Researchers experimentally proved hot electron formation in solid xenon, leading to efficient vacuum ultraviolet light generation. This breakthrough enables self-sustained electric discharge in solid xenon for potential new lighting technologies.

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Photonics

Background:

  • Understanding electron behavior in condensed matter is crucial for developing advanced materials and devices.
  • Solid xenon, a unique medium, has potential applications in areas like radiation detection and light sources.
  • Previous research has explored electron transport in noble gases, but hot electron formation in solid xenon remained less understood.

Purpose of the Study:

  • To experimentally confirm the formation of high-energy (8 eV) "hot" electrons during excess electron drift in solid xenon under an electrostatic field.
  • To investigate the efficiency of converting electrical energy into vacuum ultraviolet (VUV) light emission in solid xenon.
  • To demonstrate the feasibility of generating a self-sustained electric discharge in solid xenon.

Main Methods:

Related Experiment Videos

  • Experimental setup utilizing a three-electrode cell with a zinc cathode immersed in solid xenon.
  • Application of a moderate electrostatic field to induce excess electron drift.
  • Detection of emitted secondary electrons from the photocathode to confirm hot electron formation.
  • Measurement of VUV photon production (172 nm) and calculation of electric field-to-VUV emission conversion efficiency.

Main Results:

  • Experimental evidence confirmed the formation of 8 eV hot electrons in solid xenon.
  • At 77 K and 1000 V, each drifting electron generated approximately 20 photons at 172 nm.
  • An electric field-to-VUV emission conversion efficiency of 15% was achieved, showing a tendency to increase with temperature.
  • A self-sustained electric discharge was successfully generated in solid xenon.

Conclusions:

  • The study provides the first experimental proof of hot electron generation in solid xenon under specific conditions.
  • Solid xenon exhibits significant potential for efficient VUV light generation, with promising conversion efficiencies.
  • The successful generation of a self-sustained discharge opens avenues for novel solid xenon-based lighting and electronic applications.