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Title: Accelerated Particle Properties in Solar Flares from Gamma-Ray Line Observations

Abstract

In solar flares with strong {gamma}-ray emission, several prominent narrow lines can usually be observed emerging from a broad structure in the several hundred keV to several MeV region. They are produced by interactions of energetic protons, 3He and {alpha}-particles with the most abundant isotopes in the solar atmosphere. The underlying continuum is due to electron and positron bremsstrahlung and to the superposition of broad lines from accelerated heavy ions as well as numerous narrow nuclear lines which are too weak to be resolved individually. The properties of the accelerated particles in the October 28, 2003 flare observed with the gamma-ray spectrometer SPI onboard INTEGRAL were deduced by comparison of prominent narrow line fluence ratios, the line shapes of the 4.4 MeV 12C and 6.1 MeV 16O lines and the total nuclear line emission in the framework of a thick target interaction model.

Authors:
;  [1];  [2];  [3];  [4]
  1. CSNSM, IN2P3-CNRS and Univ Paris-Sud, 91405 Campus Orsay (France)
  2. Centre d'Etude Spatiale des Rayonnements, 9 av. du Colonel Roche, 31028 Toulouse (France)
  3. DSM/DAPNIA/Service d'Astrophysique, CEA Saclay, 91191 Gif-sur-Yvette (France)
  4. USTHB, Faculte de Physique, BP 32, El Alia, 16111 Bab Ezzouar, Algiers (Algeria)
Publication Date:
OSTI Identifier:
21056748
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713525; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA REACTIONS; BREMSSTRAHLUNG; CARBON 12; COMPARATIVE EVALUATIONS; ELECTRONS; ELEMENT ABUNDANCE; GAMMA DETECTION; GAMMA SPECTROSCOPY; HEAVY ION REACTIONS; HEAVY IONS; HELIUM 3 REACTIONS; KEV RANGE; MEV RANGE; OXYGEN 16; PHOTON EMISSION; POSITRONS; PROTON REACTIONS; PROTONS; SOLAR ATMOSPHERE; SOLAR FLARES

Citation Formats

Kiener, J., Tatischeff, V., Weidenspointner, G., Gros, M., and Belhout, A. Accelerated Particle Properties in Solar Flares from Gamma-Ray Line Observations. United States: N. p., 2007. Web. doi:10.1063/1.2713525.
Kiener, J., Tatischeff, V., Weidenspointner, G., Gros, M., & Belhout, A. Accelerated Particle Properties in Solar Flares from Gamma-Ray Line Observations. United States. doi:10.1063/1.2713525.
Kiener, J., Tatischeff, V., Weidenspointner, G., Gros, M., and Belhout, A. Mon . "Accelerated Particle Properties in Solar Flares from Gamma-Ray Line Observations". United States. doi:10.1063/1.2713525.
@article{osti_21056748,
title = {Accelerated Particle Properties in Solar Flares from Gamma-Ray Line Observations},
author = {Kiener, J. and Tatischeff, V. and Weidenspointner, G. and Gros, M. and Belhout, A.},
abstractNote = {In solar flares with strong {gamma}-ray emission, several prominent narrow lines can usually be observed emerging from a broad structure in the several hundred keV to several MeV region. They are produced by interactions of energetic protons, 3He and {alpha}-particles with the most abundant isotopes in the solar atmosphere. The underlying continuum is due to electron and positron bremsstrahlung and to the superposition of broad lines from accelerated heavy ions as well as numerous narrow nuclear lines which are too weak to be resolved individually. The properties of the accelerated particles in the October 28, 2003 flare observed with the gamma-ray spectrometer SPI onboard INTEGRAL were deduced by comparison of prominent narrow line fluence ratios, the line shapes of the 4.4 MeV 12C and 6.1 MeV 16O lines and the total nuclear line emission in the framework of a thick target interaction model.},
doi = {10.1063/1.2713525},
journal = {AIP Conference Proceedings},
number = 1,
volume = 891,
place = {United States},
year = {Mon Feb 26 00:00:00 EST 2007},
month = {Mon Feb 26 00:00:00 EST 2007}
}