Skip to main content
SpringerLink
Log in

Gamma-spectroscopy within the island of high-spin isomers nearN=82

  • Published:
Zeitschrift für Physik A Atoms and Nuclei

Abstract

A NaI sum-spectrometer combined with Ge-counters has been used to characterize the members of the island of high spin isomers nearN=82. On the basis of half lives, totalγ-decay energies and discreteγ-lines, assignments of 22 isomers are given or confirmed. The isomers are localized to the region 82≦N≦86 andZ≦68, and the excitation energies vary from 3 MeV to 12.2 MeV. An empirical relation between spin and excitation energy is presented and on this basis isomeric spin values up to (33±2)ħ are deduced. The isomers are thought to be due to strong alignment of 2 to 8 shell-model particles in a spherical or possibly weakly oblate potential.

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

Access this article

Log in via an institution

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. Pedersen, J., Back, B.B., Bernthal, F.M., Bjørnholm, S., Borggreen, J., Christensen, O., Folkmann, F., Herskind, B., Khoo, T.L., Neiman, M., Pühlhofer, F., Sletten, G.: Phys. Rev. Lett.39, 990 (1977)

    Google Scholar 

  2. Bohr, A., Mottelson, B.R.: Phys. Script.10A, 13 (1974)

    Google Scholar 

  3. Døssing, T., Neergård, K., Matsuyanagi, K., Hsi-Chen, Chang: Phys. Rev. Lett.39, 1395 (1977)

    Google Scholar 

  4. Andersson, C.G., Hellström, G., Leander, G., Ragnarsson, I., Åberg, S., Krumlinde, J., Nilsson, S.G., Szymánski, Z.: Nucl. Phys. A309, 141 (1978)

    Google Scholar 

  5. Faessler, A., Ploszajczak, M., Devi, K.R.S.: Phys. Rev. Lett.36, 1028 (1976)

    Google Scholar 

  6. Tjøm, P.O., Espe, I., Hagemann, G.B., Herskind, B., Hillis, D.L.: Phys. Lett.72B, 439 (1978)

    Google Scholar 

  7. Oblozinsky, P., Simon, R.S.: preprint 1979

  8. Broda, R., Ogawa, M., Lunardi, S., Maier, M.R., Daly, P.J., Kleinheinz, P.: Z. Physik A285, 423 (1978)

    Google Scholar 

  9. Häuser, O., Taras, P., Trautmann, W., Ward, D., Alexander, T.K., Andrews, H.R., Haas, B., Horn, D.: Phys. Rev. Lett.42, 1415 (1979)

    Google Scholar 

  10. Mariscotti, M.A.J., Beuscher, M., Davidson, W.F., Gono, Y., Jäger, H.M., Lider, R.M., Müller-Veggian, M., Neskakis, A., Haenni, D.R., Zolnowski, D.R.: Nucl. Phys. A311, 395 (1978)

    Google Scholar 

  11. Singhal, N.C., Johns, M.W.: Annual Progress Report, p. 95 (1977), Accelerator Laboratory, McMaster University

  12. Beene, J.R., Halbert, M.L., Sarantites, D.G.: B.A.P.S.23, 944 (1978); Halbert, M.L.: private communication

    Google Scholar 

  13. Broda, R., Kleinheinz, P., Daly, P.J., Behar, M., Blomqvist, I.: to be appear in Symp. on high spin phen. in nucl., Argonne (1979)

  14. Khoo, T.L., Smither, R.K., Haas, B., Häusser, O., Andrews, H.R., Horn, D., Ward, D.: Phys. Rev. Lett.41, 1027 (1978)

    Google Scholar 

  15. Merdinger, J.C., Beck, F.A., Byrski, T., Gehringer, C., Vivien, J.P., Bozek, E., Styczen, J.: Phys. Rev. Lett.42, 23 (1979)

    Google Scholar 

  16. Khoo, T.L.: private communication (1979)

  17. Carlén, L., Jönsson, S., Krumhilde, J., Lyttkens, J., Ryde, H., Strömberg, S., Hagemann, G.B., Herskind, B., Hillis, D.L.: Internat. conf. on nucl. interact., Canberra (1978)

  18. Baktash, C., der Mateosian, E., Kistner, O.C., Sunyar, A.W.: Phys. Rev. Lett.42, 637 (1979)

    Google Scholar 

  19. Aguer, P., Bastin, G., Thibaud, J.P., Barneoud, D., Boutet, J., Foin, C.: Z. Physik A285, 59 (1978)

    Google Scholar 

  20. Bastin, G., Peghaere, A., Thibaud, J.P., André, S., Barneoud, P.: (Orsay-Grenoble cooperation). private communication (1979)

  21. Hagemann, D.C.J.M., de Voigt, M.J.A., Jansens, J.F.W.: Phys. Lett.84B, 301 (1979); and private communication

    Google Scholar 

  22. Piiparinen, M., Lunardi, S., Kleinheinz, P., Backe, H., Blomqvist, J.: Z. Physik A290, 337 (1979)

    Google Scholar 

  23. Lister, K.: private communication (1979)

  24. Døssing, T., Neergård, K., Matsuyanagi, K.: Private communication (1979)

  25. Cerkaski, M., Dudek, J., Rozmaj, P., Szymanski, Z., Nilsson, S.G.: Nucl. Phys. A315, 269 (1979)

    Google Scholar 

  26. Bohr, A., Mottelson, B.: Nuclear structure, vol. II, p. 80, New York: Benjamin 1975

    Google Scholar 

  27. Myers, W.D.: Droplet model of atomic nuclei, IFI/PLENUM, New York 1977

    Google Scholar 

  28. Lee, I.Y., Aleonard, M.A., Deleplanque, M.A., El-Masri, Y., Newton, J.O., Simon, R.S., Diamond, R.M., Stephens, F.S.: Phys. Rev. Lett.38, 1454 (1977)

    Google Scholar 

  29. Khoo, T.L., Smither, R.K., Haas, B., Häusser, O., Andrews, H.R., Horn, D., Ward, D.: private communication (1979)

  30. Daly, P.J., Kleinheinz, P., Broda, R., Stefanini, A.M., Lunardi, S., Backe, H., Richter, L., Willwater, R., Weik, F.: Z. Physik A288, 103 (1978)

    Google Scholar 

  31. Stefanini, A.M., Kleinheinz, P., Maier, M.R.: Phys. Lett.62B, 405 (1976)

    Google Scholar 

Download references

Author information

Author notes

  1. F. Folkmann

    Present address: University of Århus, 8000, Århus, Denmark

Authors and Affiliations

  1. The Niels Bohr Institute, Roskilde, Denmark

    J. Borggreen, S. Bjørnholm, O. Christensen, A. Del Zoppo, B. Herskind, J. Pedersen & G. Sletten

  2. Gesellschaft für Schwerionenforschung, Darmstadt, Germany

    F. Folkmann & R. S. Simon

Authors
  1. J. Borggreen
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Bjørnholm
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. O. Christensen
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Del Zoppo
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. B. Herskind
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. J. Pedersen
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. G. Sletten
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. F. Folkmann
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. R. S. Simon
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

On leave from Istituto Nazionale de Fisica Nucleare, Catania, Italy

We wish to thank the UNILAC crew for their help during the experiments, N. Angert for help with the installation of the beam chopper, and H. Folger, S. Dahl, and J. Sørensen for preparing the targets. Private communications, prior to publication, have been of great help to us in analyzing the results and making isotopic assignments, and we wish especially to thank M.L. Halbert [12], T.L. Khoo [16], G. Bastin [20], D.C.J.M. Hagemann et al. [21], K. Lister [23] and R. Broada et al. [13] for their kind collaboration and for stimulating discussions and correspondence. This work was supported by the Danish Natural Science Research Council.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Borggreen, J., Bjørnholm, S., Christensen, O. et al. Gamma-spectroscopy within the island of high-spin isomers nearN=82. Z Physik A 294, 113–124 (1980). https://doi.org/10.1007/BF01435046

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01435046

Keywords

Search

Navigation