Stopping power of low-energy deuterons in He-3 gas

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

Research output: Contribution to journalArticlepeer-review


The stopping power of atomic and molecular deuterons in He-3 gas was measured over the range E-d = 10 to 100 keV using the He-3 pressure dependence of the He-3(d,p)He-4 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 --> 2s electron excitation of the He target atoms (= 19.8 eV, corresponding to E-d = 18.2 keV), i.e. it is a quantum effect, by which the atoms become nearly transparent for the ions.

Original languageEnglish
Pages (from-to)487-491
Number of pages5
JournalThe European Physical Journal A (EPJ A)
Issue number4
Publication statusPublished - Apr 2001


  • H2+ IONS


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