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Title: Gamow peak in thermonuclear reactions at high temperatures

Abstract

The Gamow peak represents one of the most important concepts in the study of thermonuclear reactions in stars. It is widely used in order to determine, at a given plasma temperature, the effective stellar energy region in which most charged-particle induced nuclear reactions occur. It is of importance in the design of nuclear astrophysics measurements, including those involving radioactive ion beams, and for the determination of stellar reaction rates. We demonstrate that the Gamow peak concept breaks down under certain conditions if a nuclear reaction proceeds through narrow resonances at elevated temperatures. It is shown that an effective stellar energy window does indeed exist in which most thermonuclear reactions take place at a given temperature, but that this energy window can differ significantly from the commonly used Gamow peak. We expect that these findings are especially important for thermonuclear reactions in the advanced burning stages of massive stars and in explosive stellar environments.

Authors:
; ; ;  [1];  [2];  [3];  [4]
  1. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)
  2. (United States)
  3. CSNSM, CNRS/IN2P3/UPS, Bat. 104, F-91405 Orsay Campus (France)
  4. Department of Physics, University of Cyprus, Nicosia 1678 (Cyprus)
Publication Date:
OSTI Identifier:
20995236
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.75.045801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASTROPHYSICS; CHARGED PARTICLES; DESIGN; ELECTRON TEMPERATURE; ION TEMPERATURE; PEAKS; RADIOACTIVE ION BEAMS; REACTION KINETICS; STARS; TEMPERATURE RANGE 0400-1000 K; THERMONUCLEAR REACTIONS; WINDOWS

Citation Formats

Newton, J. R., Iliadis, C., Champagne, A. E., Ugalde, C., Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308, Coc, A., and Parpottas, Y. Gamow peak in thermonuclear reactions at high temperatures. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.045801.
Newton, J. R., Iliadis, C., Champagne, A. E., Ugalde, C., Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308, Coc, A., & Parpottas, Y. Gamow peak in thermonuclear reactions at high temperatures. United States. doi:10.1103/PHYSREVC.75.045801.
Newton, J. R., Iliadis, C., Champagne, A. E., Ugalde, C., Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308, Coc, A., and Parpottas, Y. Sun . "Gamow peak in thermonuclear reactions at high temperatures". United States. doi:10.1103/PHYSREVC.75.045801.
@article{osti_20995236,
title = {Gamow peak in thermonuclear reactions at high temperatures},
author = {Newton, J. R. and Iliadis, C. and Champagne, A. E. and Ugalde, C. and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308 and Coc, A. and Parpottas, Y.},
abstractNote = {The Gamow peak represents one of the most important concepts in the study of thermonuclear reactions in stars. It is widely used in order to determine, at a given plasma temperature, the effective stellar energy region in which most charged-particle induced nuclear reactions occur. It is of importance in the design of nuclear astrophysics measurements, including those involving radioactive ion beams, and for the determination of stellar reaction rates. We demonstrate that the Gamow peak concept breaks down under certain conditions if a nuclear reaction proceeds through narrow resonances at elevated temperatures. It is shown that an effective stellar energy window does indeed exist in which most thermonuclear reactions take place at a given temperature, but that this energy window can differ significantly from the commonly used Gamow peak. We expect that these findings are especially important for thermonuclear reactions in the advanced burning stages of massive stars and in explosive stellar environments.},
doi = {10.1103/PHYSREVC.75.045801},
journal = {Physical Review. C, Nuclear Physics},
number = 4,
volume = 75,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}