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The European Physical Journal A

, Volume 8, Issue 4, pp 443–446 | Cite as

Energy loss of deuterons in 3He gas: a threshold effect

  • A. Formicola
  • M. Aliotta
  • G. Gyürky
  • F. Raiola
  • 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
  • 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
Short Note

Abstract

The energy loss of deuterons in 3He gas was measured at E d = 15 to 100 keV using the 3He pressure dependence of the 3He(d,p)4He cross-section at a given incident energy. At the highest energies, the observed energy loss is in good agreement with a standard compilation. However, with decreasing energy the experimental values drop steadily below the theoretical values and near E d = 18 keV they drop sharply (within 1 keV) reaching the domain of nuclear stopping power. This threshold behavior is due to the minimum 1s → 2s electron excitation of the He target atoms, i.e. it is a quantum effect. Some consequences are discussed.

PACS

26.20.+f Hydrostatic steller nucleosynthesis 34.50.Bw Energy loss and stopping power 

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Copyright information

© Società Italiana di Fisica Springer-Verlag 2000

Authors and Affiliations

  • A. Formicola
    • 1
  • M. Aliotta
    • 1
  • G. Gyürky
    • 2
  • F. Raiola
    • 1
  • R. Bonetti
    • 3
  • C. Broggini
    • 4
  • L. Campajola
    • 5
  • P. Corvisiero
    • 6
  • H. Costantini
    • 6
  • A. D’Onofrio
    • 7
  • Z. Fülöp
    • 2
  • G. Gervino
    • 8
  • L. Gialanella
    • 5
  • A. Guglielmetti
    • 3
  • C. Gustavino
    • 9
  • G. Imbriani
    • 5
    • 10
  • M. Junker
    • 9
  • A. Ordine
    • 5
  • P. Prati
    • 6
  • V. Roca
    • 5
  • D. Rogalla
    • 1
  • C. Rolfs
    • 1
  • M. Romano
    • 5
  • F. Schümann
    • 1
  • E. Somorjai
    • 2
  • O. Straniero
    • 11
  • F. Strieder
    • 1
  • F. Terrasi
    • 7
  • H. P. Trautvetter
    • 1
  • S. Zavatarelli
    • 6
  1. 1.Institut für Physik mit IonenstrahlenRuhr-Universität BochumBochumGermany
  2. 2.Atomki, DebrecenHungary
  3. 3.Dipartimento di FisicaUniversita di Milano and INFNMilanoItaly
  4. 4.INFNPadovaItaly
  5. 5.Dipartimento di Scienze FisicheUniversita Federico II and INFNNapoliItaly
  6. 6.Dipartimento di FisicaUniversita di Genova and INFNGenovaItaly
  7. 7.Dipartimento di Scienze AmbientaliSeconda Universita di NapoliCaserta and NapoliItaly
  8. 8.Dipartimento di Fisica SperimentaleUniversita di Torino and INFNTorinoItaly
  9. 9.Laboratori Nazionali del Gran Sasso dell’INFNAssergiItaly
  10. 10.Osservatorio Astronomico di CapodimonteNapoliItaly
  11. 11.Osservatorio Astronomico di ColluraniaTeramoItaly

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