Recent advances in charged particle energy deposition and applications to supernova spectra
Most studies of charged particle energy deposition deal with the stopping of particles by the medium. Predicting the excitation of the medium by the particles has received much less attention. The key to the solution of this latter problem is the assembly of a realistic set of detailed atomic cross sections (DACS) for all important inelastic processes induced by electrons with energies varying from the incident electron energy down to the lowest inelastic threshold. Two methods of assembling such sets are described; one based upon experimental generalized oscillator strengths, the second based upon quantum mechanical calculations using an atomic independent particle model. A continuous slowing down approximation (CSDA) method of utilizing these cross sections for calculating the excitaton of a medium by incident electrons is described, along with the yield spectra method based upon a modified discrete energy bin technique which allows for the discrete nature of the slowing down process, and a method of spatial-yield spectra calculated by Monte Carlo techniques which gives the spatial patterns of various excitations. Finally, the possibility of applying these recent techniques to the prediction of late time SN I spectra, using the radioactive excitation source model is discussed.
- Research Organization:
- Univ. of Florida, Gainesville
- OSTI ID:
- 6790341
- Report Number(s):
- CONF-800126-; TRN: 81-001422
- Journal Information:
- AIP Conf. Proc.; (United States), Vol. 63; Conference: Conference on atomic physics and spectroscopy for supernovae spectra, San Diego, CA, USA, 10 Jan 1980
- Country of Publication:
- United States
- Language:
- English
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GENERAL PHYSICS
SUPERNOVA REMNANTS
EXCITATION
SUPERNOVAE
ENERGY LOSSES
CHARGED-PARTICLE TRANSPORT
EXPERIMENTAL DATA
FLUORESCENCE
INELASTIC SCATTERING
QUANTUM MECHANICS
SLOWING-DOWN
STELLAR ATMOSPHERES
ATMOSPHERES
COSMIC RADIO SOURCES
DATA
ENERGY-LEVEL TRANSITIONS
ERUPTIVE VARIABLE STARS
INFORMATION
LOSSES
LUMINESCENCE
MECHANICS
NUMERICAL DATA
RADIATION TRANSPORT
SCATTERING
STARS
VARIABLE STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources