Stopping power, electron screening and the astrophysical S(E) factor of d(He-3,p)He-4

Citation
H. Costantini et al., Stopping power, electron screening and the astrophysical S(E) factor of d(He-3,p)He-4, PHYS LETT B, 482(1-3), 2000, pp. 43-49
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
482
Issue
1-3
Year of publication
2000
Pages
43 - 49
Database
ISI
SICI code
0370-2693(20000601)482:1-3<43:SPESAT>2.0.ZU;2-0
Abstract
The d(He-3,p)He-4 cross section has been measured at E = 4.2 to 13.8 keV us ing the LUNA underground accelerator facility. The experiment was performed to determine the magnitude of the atomic screening effect and to establish values for the energy loss used in data reduction. The observed stopping p ower of the He-3 ions in the D-2 target is in good agreement with the stand ard compilation. Using these stopping power values the data lead to an elec tron-screening potential energy U-e = 132 +/- 9 eV, which is significantly higher than the estimated value of 65 eV from an atomic-physics model. Publ ished by Elsevier Science B.V.