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Delta-electron emission in fast heavy ion atom collisions
H Schmidt-Böcking1, U Ramm, G Kraft
1Institut für Kernphysik, Universität Frankfurt, Germany.
Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1992
Summary
Understanding delta-electron emission in heavy ion collisions is crucial for explaining biological damage from radiation. This study details electron emission processes and their impact on DNA, aiding radiation biology research.
Area of Science:
- Atomic and Molecular Physics
- Radiation Biology
- Chemical Physics
Background:
- Biological damage from ionizing radiation stems from DNA biochemical changes.
- Ionizing radiation induces chemical changes via primary and secondary ionization events.
- Differences in radiation types (dense vs. sparse) relate to delta-electron production.
Purpose of the Study:
- To detail the cross-section, energy, and angular distribution of delta-electron emission.
- To qualitatively explain delta-electron emission in fast heavy ion-atom collisions.
- To understand the role of Coulomb forces and electronic state polarization in these interactions.
Main Methods:
- Qualitative explanation of delta-electron emission processes.
- Application of simple kinetic models for momentum transfer.
- Discussion of electronic state polarization effects in heavy ion collisions.
Main Results:
- Spectral structures of electron emission from target and projectile atoms are explained.
- Momentum transfer kinetics under Coulomb forces are modeled.
- Polarization effects of electronic states due to high nuclear Coulomb forces are analyzed.
Conclusions:
- Detailed understanding of delta-electron emission is vital for radiation biology.
- Coulomb forces significantly influence electron emission and electronic states in heavy ion collisions.
- The study provides insights into the fundamental physics underlying radiation-induced biological effects.