Experimental study of proton-induced nuclear reactions in Li-6,Li-7

J. Cruz, H. Luis, M. Fonseca, Z. Fueloep, G. Gyuerky, F. Raiola, M. Aliotta, K. U. Kettner, A. P. Jesus, J. P. Ribeiro, F. C. Barker, C. Rolfs

Research output: Contribution to journalArticlepeer-review

Abstract

The Li-6(p, alpha)He-3 and Li-7(p, alpha)He-4 reaction cross sections were obtained for E = 90-580 keV and E = 90-1740 keV, respectively. R-matrix and polynomial fits to the bare astrophysical S-factor confirmed, with improved accuracy, previous work data, yielding S-b(0) = 3.52 +/- 0.08 MeV b, and 55.6(-1.7)(+0.8) keV b for the Li-6 and Li-7 reactions, respectively. Therefore, the astrophysical consequences related to these two isotopes remain essentially unchanged. With the present work S-b(E) data, a reanalysis of the low energy data for different environments-Li2WO4 insulator, Li metal, and PdLix alloys-confirms that the large electron screening effects can be explained by the plasma model of Debye applied to the quasi-free electrons in the metallic samples.

Original languageEnglish
Article number014004
Pages (from-to)-
Number of pages6
JournalJournal of Physics G: Nuclear and Particle Physics
Volume35
Issue number1
DOIs
Publication statusPublished - Jan 2008

Keywords

  • D+D FUSION REACTIONS
  • CROSS-SECTIONS
  • LI-6(P,HE-3)HE-4 REACTION
  • DEUTERATED METALS
  • S(E) FACTOR
  • ELECTRON
  • ENERGIES
  • ENVIRONMENTS
  • BOMBARDMENT
  • ALPHA)ALPHA

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