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Title: Cross section measurements of the Big Bang nucleosynthesis reaction D({alpha},{gamma})6Li by Coulomb dissociation of 6Li

Abstract

The possibility that big-bang nucleosynthesis (BBN) may produce nontrivial amounts of 6Li is under study since the recent observations of this element in old halo stars. However, the interpretation of these observations needs a precise knowledge of the reaction rate of D({alpha}, {gamma})6Li which, at present, is extremely uncertain (a factor of 20) at the energies of astrophysical interest (Ecm {<=} 300 keV). This uncertainty originates from difficulties in both theoretical estimates and experimental determinations of the D({alpha}, {gamma})6Li capture reaction cross section. New measurements of the cross section of D({alpha}, {gamma})6Li reaction using Coulomb dissociation of 6Li at 150 A MeV have been performed recently at GSI. The results will be compared to previous measurements and theoretical calculations.

Authors:
 [1];  [2];  [3]; ; ; ; ; ; ; ; ; ;  [4]; ;  [5]; ; ; ;  [6];  [7] more »;  [8] « less
  1. IPN-Orsay, IN2P3-Universite Paris XI, 91406 Orsay (France)
  2. (Germany)
  3. TU Darmstadt, D-64220 Darmstadt (Germany)
  4. GSI, Postfach 110552, D-64220 Darmstadt (Germany)
  5. Santiago de compostella (Spain)
  6. CSNSM, IN2P3-Universite Paris XI, 91405 Orsay (France)
  7. RIKEN, Hirosawa, Wako, Saitama 351-01 (Japan)
  8. Fachbereich Physik, Philipps Universitaet, D-3550 Marburg (Germany) (and others)
Publication Date:
OSTI Identifier:
20798535
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 831; Journal Issue: 1; Conference: International conference on frontiers in nuclear structure, astrophysics, and reactions - FINUSTAR, Isle of Kos (Greece), 12-17 Sep 2005; Other Information: DOI: 10.1063/1.2200893; (c) 2006 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; CAPTURE; CROSS SECTIONS; DEUTERIUM TARGET; DISSOCIATION; KEV RANGE; LITHIUM 6; MEV RANGE; NUCLEAR REACTION KINETICS; NUCLEOSYNTHESIS; SCATTERING

Citation Formats

Hammache, F., GSI, Postfach 110552, D-64220 Darmstadt, Galaviz, D., Suemmerer, K., Typel, S., Attallah, F., Geissel, H., Hellstroem, M., Koczon, P., Schwab, E., Schwarz, K., Senger, P., Uhlig, F., Caamano, M., Cortina, D., Coc, A., Kiener, J., Tatischeff, V., Thibaud, J. P., Iwasa, N., and Kohlmeyer, B. Cross section measurements of the Big Bang nucleosynthesis reaction D({alpha},{gamma})6Li by Coulomb dissociation of 6Li. United States: N. p., 2006. Web. doi:10.1063/1.2200893.
Hammache, F., GSI, Postfach 110552, D-64220 Darmstadt, Galaviz, D., Suemmerer, K., Typel, S., Attallah, F., Geissel, H., Hellstroem, M., Koczon, P., Schwab, E., Schwarz, K., Senger, P., Uhlig, F., Caamano, M., Cortina, D., Coc, A., Kiener, J., Tatischeff, V., Thibaud, J. P., Iwasa, N., & Kohlmeyer, B. Cross section measurements of the Big Bang nucleosynthesis reaction D({alpha},{gamma})6Li by Coulomb dissociation of 6Li. United States. doi:10.1063/1.2200893.
Hammache, F., GSI, Postfach 110552, D-64220 Darmstadt, Galaviz, D., Suemmerer, K., Typel, S., Attallah, F., Geissel, H., Hellstroem, M., Koczon, P., Schwab, E., Schwarz, K., Senger, P., Uhlig, F., Caamano, M., Cortina, D., Coc, A., Kiener, J., Tatischeff, V., Thibaud, J. P., Iwasa, N., and Kohlmeyer, B. Wed . "Cross section measurements of the Big Bang nucleosynthesis reaction D({alpha},{gamma})6Li by Coulomb dissociation of 6Li". United States. doi:10.1063/1.2200893.
@article{osti_20798535,
title = {Cross section measurements of the Big Bang nucleosynthesis reaction D({alpha},{gamma})6Li by Coulomb dissociation of 6Li},
author = {Hammache, F. and GSI, Postfach 110552, D-64220 Darmstadt and Galaviz, D. and Suemmerer, K. and Typel, S. and Attallah, F. and Geissel, H. and Hellstroem, M. and Koczon, P. and Schwab, E. and Schwarz, K. and Senger, P. and Uhlig, F. and Caamano, M. and Cortina, D. and Coc, A. and Kiener, J. and Tatischeff, V. and Thibaud, J. P. and Iwasa, N. and Kohlmeyer, B.},
abstractNote = {The possibility that big-bang nucleosynthesis (BBN) may produce nontrivial amounts of 6Li is under study since the recent observations of this element in old halo stars. However, the interpretation of these observations needs a precise knowledge of the reaction rate of D({alpha}, {gamma})6Li which, at present, is extremely uncertain (a factor of 20) at the energies of astrophysical interest (Ecm {<=} 300 keV). This uncertainty originates from difficulties in both theoretical estimates and experimental determinations of the D({alpha}, {gamma})6Li capture reaction cross section. New measurements of the cross section of D({alpha}, {gamma})6Li reaction using Coulomb dissociation of 6Li at 150 A MeV have been performed recently at GSI. The results will be compared to previous measurements and theoretical calculations.},
doi = {10.1063/1.2200893},
journal = {AIP Conference Proceedings},
number = 1,
volume = 831,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2006},
month = {Wed Apr 26 00:00:00 EDT 2006}
}