Stopping power of low-energy deuterons in ${^{3}He}$ gas

F. Raiola; G. Gyürky; M. Aliotta; A. Formicola; R. Bonetti; C. Broggini; L. Campajola; P. Corvisiero; H. Costantini; A. D'Onofrio; Z. Fülöp; G. Gervino; L. Gialanella; A. Guglielmetti; C. Gustavino; G. Imbriani; M. Junker; R.W. Kavanagh; P.G.P. Moroni; A. Ordine; P. Prati; V. Roca; D. Rogalla; C. Rolfs; M. Romano; F. Schümann; E. Somorjai; O. Straniero; F. Strieder; F. Terrasi; H.P. Trautvetter; S. Zavatarelli

doi:doi:10.1007/s100500170107

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A 10, 487-491

Stopping power of low-energy deuterons in ³He gas

F. Raiola¹, G. Gyürky², M. Aliotta¹, A. Formicola¹, R. Bonetti³, C. Broggini⁴, L. Campajola⁵, P. Corvisiero⁶, H. Costantini⁶, A. D'Onofrio⁷, Z. Fülöp², G. Gervino⁸, L. Gialanella⁵, A. Guglielmetti³, C. Gustavino⁹, G. Imbriani^{5, 10}, M. Junker⁹, R.W. Kavanagh¹¹, P.G.P. Moroni⁶, A. Ordine⁵, P. Prati⁶, V. Roca⁵, D. Rogalla¹, C. Rolfs¹, M. Romano⁵, F. Schümann¹, E. Somorjai², O. Straniero¹², F. Strieder¹, F. Terrasi⁷, H.P. Trautvetter¹ and S. Zavatarelli⁶

¹ Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum, Bochum, Germany
² Atomki, Debrecen, Hungary
³ Dipartimento di Fisica, Università di Milano and INFN, Milano, Italy
⁴ INFN, Padova, Italy
⁵ Dipartimento di Scienze Fisiche, Università Federico II and INFN, Napoli, Italy
⁶ Dipartimento di Fisica, Università di Genova and INFN, Genova, Italy
⁷ Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta and Napoli, Italy
⁸ Dipartimento di Fisica Sperimentale, Università di Torino and INFN, Torino, Italy
⁹ Laboratori Nazionali del Gran Sasso dell'INFN, Assergi, Italy
¹⁰ Osservatorio Astronomico di Capodimonte, Napoli, Italy
¹¹ California Institute of Technology, Pasadena, CA, USA
¹² Osservatorio Astronomico di Collurania, Teramo, Italy

rolfs@ep3.ruhr-uni-bochum.de

(Received: 14 February 2001 / Revised version: 20 April 2001 Communicated by D. Schwalm)

Abstract
The stopping power of atomic and molecular deuterons in ³He gas was measured over the range $E_{\rm d}$ = 10 to 100 keV using the ³He pressure dependence of the ³He(d,p)⁴He reaction yield. At energies above 30 keV, the observed stopping power values are in good agreement with a standard compilation. However, near 18 keV the experimental values drop by a factor 50 below the extrapolated values of the compilation. In a simple model, the behavior is due to the minimum $1s \to 2s$ electron excitation of the He target atoms (= 19.8 eV, corresponding to $E_{\rm d}$ = 18.2 keV), i.e. it is a quantum effect, by which the atoms become nearly transparent for the ions.

PACS
26.20.+f - Hydrostatic stellar nucleosynthesis.
34.50.-s - Scattering of atoms and nucleus.

© Società Italiana di Fisica, Springer-Verlag 2001