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Photon emission from massive projectile impacts on solids.

F A Fernandez-Lima¹, V T Pinnick, S Della-Negra

¹Department of Chemistry, Texas A&M University, College Station, TX, 77843, USA.

Surface and Interface Analysis : SIA

|May 24, 2011

Summary

This summary is machine-generated.

Massive gold cluster impacts on solids emit photons within nanoseconds. This photon emission, along with unusual electron emission, suggests electronic excitation from high-energy deposition during impact.

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Area of Science:

Physics
Materials Science
Nanotechnology

Background:

Understanding projectile-surface interactions is crucial for various scientific fields.
Investigating energy deposition mechanisms in materials under extreme conditions is an ongoing challenge.

Purpose of the Study:

To provide the first evidence of photon emission from individual impacts of massive gold cluster projectiles on solid targets.
To investigate the relationship between projectile characteristics (size, velocity) and photon/electron emission.
To explore the underlying physical mechanisms responsible for observed emissions.

Main Methods:

Experimentally bombarding solid targets with massive gold cluster ions (Au(n)(+q), 1 ≤ n ≤ 400) at energies of 28-136 keV.
Detecting and analyzing photon emission occurring within 10 nanoseconds post-impact.
Observing and characterizing concurrent electron emission, even below the kinetic emission threshold.

Main Results:

Confirmed photon emission from individual impacts of massive gold cluster projectiles.
Observed photon yield increases with projectile size and velocity.
Detected electron emission under conditions not typically associated with electron emission, correlating with photon emission.

Conclusions:

The observed photon and electron emissions are interpreted as evidence of electronic excitation.
High-energy density deposited by massive cluster projectiles during impact is the likely cause of these phenomena.
This study opens new avenues for understanding cluster-solid interactions and energy deposition.