skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The fluorine destruction in stars: First experimental study of the {sup 19}F(p,{alpha}){sup 16}O reaction at astrophysical energies

Abstract

The {sup 19}F(p,{alpha}){sup 16}O reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogendeficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E{sub cm}{approx} 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the {sup 2}H({sup 19}F,{alpha}{sup 16}O)n reaction. The TH measurement of the {alpha}{sub 0} channel, which is the dominant one at such energies, shows the presence of resonant structures not observed before that cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential important consequences for stellar nucleosynthesis.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] more »;  [2];  [3]; « less
  1. INFN-LNS, Catania (Italy)
  2. (United States)
  3. (Italy)
Publication Date:
OSTI Identifier:
22075792
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1484; Journal Issue: 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASTROPHYSICS; ASYMPTOTIC SOLUTIONS; COULOMB FIELD; DEUTERIUM TARGET; DIRECT REACTIONS; FLUORINE 19 REACTIONS; FLUORINE 19 TARGET; GIANT STARS; KEV RANGE; NUCLEAR REACTION KINETICS; NUCLEOSYNTHESIS; OXYGEN 16; POTENTIALS; PROTON REACTIONS; PROTON-NUCLEON INTERACTIONS

Citation Formats

La Cognata, M., Mukhamedzhanov, A., Spitaleri, C., Indelicato, I., Aliotta, M., Burjan, V., Cherubini, S., Coc, A., Gulino, M., Hons, Z., Kiss, G. G., Kroha, V., Lamia, L., Mrazek, J., Palmerini, S., Piskor, S., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Cyclotron Institute, Texas A and M University, College Station, Texas, University of Catania and INFN-LNS, Catania, and and others. The fluorine destruction in stars: First experimental study of the {sup 19}F(p,{alpha}){sup 16}O reaction at astrophysical energies. United States: N. p., 2012. Web. doi:10.1063/1.4763456.
La Cognata, M., Mukhamedzhanov, A., Spitaleri, C., Indelicato, I., Aliotta, M., Burjan, V., Cherubini, S., Coc, A., Gulino, M., Hons, Z., Kiss, G. G., Kroha, V., Lamia, L., Mrazek, J., Palmerini, S., Piskor, S., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Cyclotron Institute, Texas A and M University, College Station, Texas, University of Catania and INFN-LNS, Catania, & and others. The fluorine destruction in stars: First experimental study of the {sup 19}F(p,{alpha}){sup 16}O reaction at astrophysical energies. United States. doi:10.1063/1.4763456.
La Cognata, M., Mukhamedzhanov, A., Spitaleri, C., Indelicato, I., Aliotta, M., Burjan, V., Cherubini, S., Coc, A., Gulino, M., Hons, Z., Kiss, G. G., Kroha, V., Lamia, L., Mrazek, J., Palmerini, S., Piskor, S., Pizzone, R. G., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Cyclotron Institute, Texas A and M University, College Station, Texas, University of Catania and INFN-LNS, Catania, and and others. Mon . "The fluorine destruction in stars: First experimental study of the {sup 19}F(p,{alpha}){sup 16}O reaction at astrophysical energies". United States. doi:10.1063/1.4763456.
@article{osti_22075792,
title = {The fluorine destruction in stars: First experimental study of the {sup 19}F(p,{alpha}){sup 16}O reaction at astrophysical energies},
author = {La Cognata, M. and Mukhamedzhanov, A. and Spitaleri, C. and Indelicato, I. and Aliotta, M. and Burjan, V. and Cherubini, S. and Coc, A. and Gulino, M. and Hons, Z. and Kiss, G. G. and Kroha, V. and Lamia, L. and Mrazek, J. and Palmerini, S. and Piskor, S. and Pizzone, R. G. and Puglia, S. M. R. and Rapisarda, G. G. and Romano, S. and Cyclotron Institute, Texas A and M University, College Station, Texas and University of Catania and INFN-LNS, Catania and and others},
abstractNote = {The {sup 19}F(p,{alpha}){sup 16}O reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogendeficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E{sub cm}{approx} 300 keV), because of the hindrance effect of the Coulomb barrier. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution to the {sup 2}H({sup 19}F,{alpha}{sup 16}O)n reaction. The TH measurement of the {alpha}{sub 0} channel, which is the dominant one at such energies, shows the presence of resonant structures not observed before that cause an increase of the reaction rate at astrophysical temperatures up to a factor of 1.7, with potential important consequences for stellar nucleosynthesis.},
doi = {10.1063/1.4763456},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1484,
place = {United States},
year = {2012},
month = {11}
}