Skip to main content
Log in

Isotopic dependence of electron screening in fusion reactions

  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The fusion reactions6Li(p, α)3He,6Li(d, α)4He, and7Li(p, α)4He have been studied over the c.m. energy rangeE=10 to 1450 keV. Each reaction involved the use of hydrogen projectiles and LiF solid targets as well as Li projectiles and hydrogen molecular gas targets. In all cases the effects of electron screening on the low-energy fusion cross sections (exponential enhancement) have been observed; the effects are somewhat stronger in the case of atomicp ord projectiles compared to the case of molecularH 2 orD 2 gas targets. If isotopic effects on electron screening are negligible, all three reactions should exhibit the same enhancements for each set of experimental techniques. The measurements confirmed this expectation to a large extent.

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.W.: Cauldrons in the cosmos: Chicago: University of Chicago Press 1988

    Google Scholar 

  2. Assenbaum, H.J., Langanke, K., Rolfs, C.: Z. Phys. A — Atomic Nuclei327 461 (1987)

    Google Scholar 

  3. Langanke, K., Rolfs, C.: Mod. Phys. Lett. A4, 2101 (1989)

    Google Scholar 

  4. Engstler, S., et al.: Phys. Lett. B202, 179 (1988)

    Google Scholar 

  5. Blüge, G., et al.: Z. Phys. A — Atomic Nuclei333, 219 (1989)

    Google Scholar 

  6. Bracci, L., et al.: Nucl. Phys. A513, 316 (1990)

    Google Scholar 

  7. Marion, J.B., Weber, G., Mozer, F.S.: Phys. Rev.104, 1402 (1956)

    Google Scholar 

  8. Gemeinhardt, W., Kamke, D., von Rhöneck, C.: Z. Phys.197, 58 (1966)

    Google Scholar 

  9. Fiedler, O., Kunze, R.: Nucl. Phys. A96, 513 (1967)

    Google Scholar 

  10. Spinka, H., Tombrello, T.A., Winkler, H.: Nucl. Phys. A164, 1 (1971)

    Google Scholar 

  11. Szabo, J., et al.: Nucl. Data for Science and Technology. Böckhoff, K.H. (ed.), p. 956. Brussels: ECSC 1983); and Szabo, J.: Private communication

    Google Scholar 

  12. Shinozuka, T., Tanaka, Y., Sugiyama, K.: Nucl. Phys. A326, 47 (1979)

    Google Scholar 

  13. Elwyn, A.J., et al.: Phys. Rev. C20, 1984 (1979)

    Google Scholar 

  14. Kwon, J.U., Kim, J.C., Sung, B.M.: Nucl. Phys. A493, 112 (1989)

    Google Scholar 

  15. Manalis, M., Henkel, J.E.: Phys. Rev. B136, 1741 (1964)

    Google Scholar 

  16. Lee, C.C.: J. Korean Phys. Soc.2, 1 (1969)

    Google Scholar 

  17. McClenahan, C.R., Segel, R.E.: Phys. Rev. C11, 370 (1975)

    Google Scholar 

  18. Elwyn, A.J., et al.: Phys. Rev. C16, 1744 (1977)

    Google Scholar 

  19. Golokov, M.S., et al.: Sov. J. Nucl. Phys.34, 480 (1981)

    Google Scholar 

  20. Rolfs, C., Kavanagh, R.W.: Nucl. Phys. A455, 179 (1986)

    Google Scholar 

  21. Harmon, J.F.: Nucl. Instrum. Methods B40/41, 507 (1989)

    Google Scholar 

  22. Engstler, S.: Thesis, UniversitÄt Münster 1991

  23. Raimann, G.: Thesis, UniversitÄt Münster 1991

  24. Marion, J.B., Young, F.C.: Nuclear reaction analysis. Amsterdam: North Holland 1968

    Google Scholar 

  25. Freye, T., et al.: Z. Phys. A — Atoms and Nuclei281, 211 (1977)

    Google Scholar 

  26. Krauss, A., et al: Nucl. Phys. A465, 150 (1987)

    Google Scholar 

  27. Neldner, K., et al.: Nucl. Instrum. Methods A274, 419 (1989)

    Google Scholar 

  28. Trautvetter, H.P., et al.: Nucl. Instrum. Methods161, 173 (1979)

    Google Scholar 

  29. Rolfs, C., et al.: Nucl. Instrum. Methods157, 19 (1978)

    Google Scholar 

  30. Becker, H.W., et al.: Nucl. Instrum. Methods198, 279 (1982)

    Google Scholar 

  31. Kettner, K.U., et al.: Z. Phys. A — Atomic Nuclei308, 73 (1982)

    Google Scholar 

  32. Görres, J., et al.: Nucl. Instrum. Methods177, 295 (1980)

    Google Scholar 

  33. Krauss, A., et al.: Nucl. Phys. A467, 273 (1987)

    Google Scholar 

  34. Greife, U.: Diplomarbeit, UniversitÄt Münster (1989)

  35. Lorenz-Wirzba, H., et al.: Nucl. Phys. A313, 346 (1979)

    Google Scholar 

  36. Raimann, G., et al.: Phys. Lett. B249, 191 (1990)

    Google Scholar 

  37. Ziegler, J.F., Biersack, J.P., Littmark, U.: The stopping and range of ions in solids. New York: Pergamon Press 1985

    Google Scholar 

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

    Google Scholar 

  39. Andersen, H.H., Besenbacher, F., Knudsen, H.: Nucl. Instrum. Methods149, 121 (1978)

    Google Scholar 

  40. Barker, F.C., et al.: Ap. J.173 477 (1972)

    Google Scholar 

  41. Kirch, B.: Diplomarbeit, UniversitÄt Münster 1991

  42. Monahan, J.E., Elwyn, A.J., Serduke, F.J.D.: Nucl. Phys. A269, 61 (1976)

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

Supported in part by the Landesamt Nordrhein-Westfalen (IVA5-10600387), the Deutsche Forschungsgemeinschaft (Ro429/ 18-2 and Ro429/21-1), and the Comision Interministerial de Ciencia y Tecnologia (AEN90-0932)

The authors would like to thank H.W. Becker, G. Blüge, A. Krauss, and H.P. Trautvetter for many discussions, and H. Baumeister, K. Brand, H. Ebbing, A. Gottdang, B. Hippert, A. Mann, and H. Schulte for technical assistance. We are also grateful to M. Berheide, A. Gardberg, U. Giesen, C. Iliadis, N. Meyer, K. Neldner, G, Roters, T. Schange, S. Schmidt, S. Seuthe, A. Stefan, R. Timmermann, M. Topheide, K. Wolke, and S. Wüstenbecker for help during the course of the experiments. We also thank C.A. Barnes and J.F. Harmon for fruitful discussions and R.W. Kavanagh for comments on the manuscript.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Engstler, S., Raimann, G., Angulo, C. et al. Isotopic dependence of electron screening in fusion reactions. Z. Physik A - Hadrons and Nuclei 342, 471–482 (1992). https://doi.org/10.1007/BF01294958

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01294958

PACS

Navigation