Evidence for a host-material dependence of the n/p branching ratio of low-energy d+d reactions within metallic environments

  • A. Huke
  • K. Czerski
  • T. Dorsch
  • A. Biller
  • P. Heide
  • G. Ruprecht
Nuclear Physics in Astrophysics II


Angular distributions and the neutron-proton branching ratio of the mirror reactions 2H(d, p)3H and 2H(d, n)3He have been investigated using different self-implanted deuterized metallic targets at projectile energies between 5 and 60. Whereas the experimental results obtained for the transition metals Zr, Pd, Ta and also Al do not differ from those known from gas-target experiments, an enhancement of the angular anisotropy in the neutron channel and an attenuation of the neutron-proton branching ratio have been observed for the (earth)alkaline metals Li, Sr and Na at deuteron energies below 20. Experimental results are discussed with consideration of the special problems arising from the properties of these chemically very reactive target materials. A first theoretical effort explaining simultaneously both n/p asymmetry effects based on an induced polarization of the reacting deuterons within the crystal lattice is presented.


24.70.+s Polarization phenomena in reactions 25.45.Hi Transfer reactions 26.20.+f Hydrostatic stellar nucleosynthesis 89.30.Jj Nuclear fusion power 


  1. 1.
    D.R. Tilley, H.R. Weller, G.M. Hale, Nucl. Phys. A 541, 1 (1992).CrossRefADSGoogle Scholar
  2. 2.
    Zs. Fülöp, Gy. Gyürky, E. Somorjai, D. Schürmann, Nucl. Phys. A 758, 697c (2005).CrossRefADSGoogle Scholar
  3. 3.
    K. Czerski, A. Huke, P. Heide, M. Hoeft, G. Ruprecht, in Nuclei in the Cosmos V, Proceedings of the International Symposium on Nuclear Astrophysics, Volos, Greece, July 6-11, 1998, edited by N. Prantzos, S. Harissopulos (Editions Frontières, Paris, 1998) p. 152.Google Scholar
  4. 4.
    K. Czerski, A. Huke, A. Biller, P. Heide, M. Hoeft, G. Ruprecht, Europhys. Lett. 54, 449 (2001).CrossRefGoogle Scholar
  5. 5.
    F. Raiola, Phys. Lett. B 547, 193 (2002).CrossRefADSGoogle Scholar
  6. 6.
    A. Huke, PhD Thesis, Technische Universität Berlin (2002)Google Scholar
  7. 7.
    A. Biller, K. Czerski, P. Heide, M. Hoeft, A. Huke, G. Ruprecht, in Verhandlungen der DPG, Vol. 1 (DPG-Frühjahrstagung, Göttingen, 1997) p. 28.Google Scholar
  8. 8.
    T. Dorsch, Diploma Thesis, Institut für Atomare Physik und Fachdidaktik der Technischen Universität Berlin (2004).Google Scholar
  9. 9.
    A. Huke, K. Czerski, T. Dorsch, P. Heide, Proceedings of the International Conference on Condensed Matter Nuclear Science, Marseille (2004).Google Scholar
  10. 10.
    W.M. Mueller, J.P. Blackledge, G.G. Libowitz (Editors), Metal Hydrides (Academic Press, New York, London, 1968).Google Scholar
  11. 11.
    R.E. Brown, N. Jarmie, Phys. Rev. C 41, 1391 (1990).CrossRefADSGoogle Scholar
  12. 12.
    A. Biller, Diploma Thesis, Institut für Atomare und Analytische Physik der Technischen Universität Berlin (1998).Google Scholar
  13. 13.
    M. Wagner, Gruppentheoretische Methoden in der Physik (Vieweg, Braunschweig, Wiesbaden, 1998).Google Scholar
  14. 14.
    K. Dybdal, J.S. Forster, N. Rud, Phys. Rev. Lett. 43, 1711 (1979).CrossRefADSGoogle Scholar
  15. 15.
    K.-H. Speidel, Phys. Lett. B 324, 130 (1994).CrossRefADSGoogle Scholar
  16. 16.
    H. Paetz gen. Schieck, S. Lemaitre, Ann. Phys. (Leipzig) 2, 503 (1993).Google Scholar
  17. 17.
    O. Geiger, S. Lema\^itre, H. Paetz gen. Schieck, Nucl. Phys. A 586, 140 (1995).CrossRefADSGoogle Scholar
  18. 18.
    A. Huke, K. Czerski, P. Heide, Nucl. Phys. A 719, 279c (2003).CrossRefADSGoogle Scholar
  19. 19.
    K. Czerski, A. Huke, P. Heide, G. Ruprecht, Europhys. Lett. 68, 363 (2004).CrossRefADSGoogle Scholar
  20. 20.
    C.K. Hargrove, D.J. Paterson, J.S. Batkin, Phys. Rev. C 60, 034608 (1999).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  • A. Huke
    • 1
  • K. Czerski
    • 1
    • 2
  • T. Dorsch
    • 1
  • A. Biller
    • 1
  • P. Heide
    • 1
  • G. Ruprecht
    • 1
    • 3
  1. 1.Institut für Atomare Physik und FachdidaktikTechnische Universität BerlinBerlinGermany
  2. 2.Institute of PhysicsUniversity of SzczecinSzczecinPoland
  3. 3.TRIUMFVancouverCanada

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