Skip to main content
Log in

The15N(p,α 0)12C reaction at stellar energies

  • Published:
Zeitschrift für Physik A Atoms and Nuclei

Abstract

The15N(ρ, α0)12C reaction has been investigated in the energy range ofE p (lab)=78-810keV. The measurement of the excitation functions and α-particle angular distributions involved solid targets as well as a quasi-point supersonic jet gas target. The determination of absolute cross sections has been carried out with the gas target. The observed energy dependence of the total cross sections can be described in terms of two-level Breit-Wigner shapes including the resonances atE p (J π)=335(1) and 1,028(1)keV. The data lead to a zero-energy intercept of the astrophysicalS(E) factor ofS(0)= 65±4MeV-b. The angular distributions are asymmetric around 90° and require an additional amplitude in the reaction mechanism, which interferes predominantly with the 335 keV resonance. The origin of this background amplitude is discussed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Rolfs, C., Rodney, W.S.: Astrophys. J. Lett.194, L63 (1974);

    Article  Google Scholar 

  2. Rolfs, C., Rodney, W.S.: Nucl. Phys. A250, 295 (1975)

    Google Scholar 

  3. Fowler, W.A., Caughlan, G.R., Zimmerman, B.A.: Annu. Rev. Astr. Astrophys.13, 69 (1975)

    Google Scholar 

  4. Wiescher, M., Becker, H.W., Görres, J., Kettner, K.U., Trautvetter, H.P., Kieser, W.E., Rolfs, C., Azuma, R.E., Jackson, K.P., Hammer, J.W.: Nucl. Phys. A349, 165 (1980)

    Google Scholar 

  5. Hebbard, D.F.: Nucl. Phys.15, 450 (1960)

    Google Scholar 

  6. Rolfs, C., Rodney, W.S.: Nucl. Phys. A235, 450 (1974)

    Google Scholar 

  7. Schardt, A., Fowler, W.A., Lauritsen, C.C.: Phys. Rev.86, 527 (1952)

    Google Scholar 

  8. Zyskind, J.L., Parker, P.D.: Nucl. Phys. A320, 404 (1979)

    Google Scholar 

  9. Lorenz-Wirzba, H., Rolfs, C.: Arbeitsbericht 1977 des Institut für Kernphysik, Universität Münster, p. 7

  10. Freye, T., Lorenz-Wirzba, H., Cleff, B., Trautvetter, H.P., Rolfs, C.: Z. Phys. A — Atoms and Nuclei281, 211 (1977)

    Google Scholar 

  11. Lorenz-Wirzba, H., Schmalbrock, P., Trautvetter, H.P., Wiescher, M., Rolfs, C.: Nucl. Phys. A313, 346 (1979)

    Google Scholar 

  12. Baumeister, H., Kräwinkel, H., Wiezorek, C.: Arbeitsbericht 1977 des Institut für Kernphysik, Universität Münster, p. 92

  13. Ajzenberg-Selove, F.: Nucl. Phys. A281, 1 (1977)

    Google Scholar 

  14. Becker, H.W., Buchmann, L., Görres, J., Kettner, K.U., Kräwinkel, H., Rolfs, C., Schmalbrock, P., Trautvetter, H.P., Vlieks, A.: Nucl. Instrum. Methods (in print)

  15. Redder, A.: Diplomarbeit, Universität Münster (1982)

  16. Lorenz-Wirzba, H.: Thesis, Universität Münster (1978)

  17. Andersen, H.H., Ziegler, J.F.: Hydrogen stopping powers and ranges in all elements. New York: Pergamon Press 1977

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

Supported by the Deutsche Forschungsgemeinschaft (Ro 429/13)

Supported by the Minister für Wissenschaft und Forschung des Landes Nordrhein-Westfalen

The authors would like to thank L. Buchmann, J. Görres, M. Hilgemeier, K.U. Kettner, H. Kräwinkel, A. Krauss, A. Vlieks and M. Wiescher for their help during the course of the experiments. We thank also Prof. H. Wäffler (Mainz) for the hospitality and support given for this experiment. It is a pleasure to acknowledge Profs. W.A. Fowler, C.A. Barnes and P.D. Parker for helpful comments and discussions in the early phase of this work. The authors are grateful to the Deutsche Forschungsgemeinschaft for a travelling grant and other support.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Redder, A., Becker, H.W., Lorenz-Wirzba, H. et al. The15N(p,α 0)12C reaction at stellar energies. Z Physik A 305, 325–333 (1982). https://doi.org/10.1007/BF01419081

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01419081

Keywords

Navigation