Skip to main content
Log in

Observation of the isotopes264108 and265108

  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

The experiment having led to the discovery of first isotopes of element 108, as published previously in Short Notes to this Journal [1, 2] are described and discussed in a final paper.

Two isotopes of element 108 were produced by complete fusion of207Pb and208Pb, respectively, with58Fe. Both isotopes areα-emitters.

For the isotope with mass 265 threeα-decay sequences were observed. Theα-decay energy is (10.36±0.03) MeV, the half-life (1.8 +2.2−0.7 ) ms. For the isotope with mass 264, which is the heaviest doubly even isotope known at present, the decay sequence of one atom was found. The measured half-life is (76 +364−36 ) μs.

Our experimental results point towards an enhanced stability of the heaviest elements against spontaneous fission, which was already observed for element 106.

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. Münzenberg, G., Armbruster, P., Folger, H., Heßberger, F.P., Hofmann, S., Keller, J., Poppensieker, K., Reisdorf, W., Schmidt, K.-H., Schött, H.-J., Leino, M.E., Hingmann, R.: Z. Phys. A — Atoms and Nuclei317, 235 (1984)

    Google Scholar 

  2. Münzenberg, G., Armbruster, P., Berthes, G., Folger, H., Heßberger, F.P., Hofmann, S., Poppensieker, K., Reisdorf, W., Quint, B., Schmidt, K.-H., Schött, H.-J., Sümmerer, K., Zychor, I., Leino, M.E., Gollerthan, U., Hanelt, E.: Z. Phys. A — Atomic Nuclei324, 489 (1986)

    Google Scholar 

  3. Oganessian, Yu.Ts., Orlova, O.A., Ter-Akopyan, G.M., Muzychka, Yu.A., Pleve, A.A., Pustylnik, B.F., Chepigin, V.I., Flerov, G.N.: Proc. Int. Symp. Phys. Chem. Fission, Jülich 129 (1979)

  4. Oganessian, Yu.Ts., Ter-Akopyan, G.M., Pleve, A.A., Chepigin, V.I., Orlova, O.A., Seidel, U., Selitski, Yu.A., Funstein, V.B., Bruchertseifer, H., Konstantinescu, O., Schwarzenberg, M., Gavrilov, A., Kovalenko, S.S., Petrzhak, K.A.: Int. Report, JINR P 7-12054, Dubna (1978)

  5. Orlova, O.A., Pleve, A.A., Ter-Akopyan, G.M., Tretyakova, S.P., Chepigin, V.I., Cherepanov, E.A.: Int. Report JINR P 7-12042, Dubna (1979)

  6. Oganessian, Yu.Ts., Demin, A.G., Hussennois, M., Tretyakova, S.P., Kharitanov, Yu.P., Utykonkov, V.K., Shirokovski, F.V., Constantinescu, O., Bruchertseifer, H., Korotkin, Yu.S.: Z. Phys. A — Atoms and Nuclei319, 215 (1984)

    Google Scholar 

  7. Münzenberg, G., Reisdorf, W., Hofmann, S., Agarwal, Y.K., Heßberger, F.P., Poppensieker, K., Schneider, J.R.H., Schneider, W.F.W., Schmidt, K.-H., Schött, H.-J., Armbruster, P., Sahm, C.C., Vermeulen, D.: Z. Phys. A — Atoms and Nuclei315, 145 (1984)

    Google Scholar 

  8. Münzenberg, G., Hofmann, S., Folger, H., Heßberger, F.P., Keller, J., Poppensieker, K., Quint, B., Reisdorf, W., Schmidt, K.-H., Schött, H.-J., Armbruster, P., Leino, M.E., Hingmann, R.: Z. Phys. A — Atoms and Nuclei322, 227 (1985)

    Google Scholar 

  9. Strehl, P.: In: 9th Conf. on Cyclotrons and Applications 1981, Caen. p. 545. Les Ulis Cedex: les éditions de physique 1982

  10. Folger, H., Hartmann, W., Thalheimer, W.: INDTS, Argonne Nat. Lab, USA ANC/PHY-82-2, 15 (1983)

  11. Münzenberg, G., Faust, W., Hofmann, S., Armbruster, P., Güttner, K., Ewald, H.: Nucl. Instrum. Methods161, 65 (1979)

    Google Scholar 

  12. Hofmann, S., Münzenberg, G., Heßberger, F.P., Schött, H.-J.: Nucl. Instr. Methods223, 312 (1984)

    Google Scholar 

  13. Faust, W., Münzenberg, G., Hofmann, S., Reisdorf, W., Schmidt, K.-H., Armbruster, P., Güttner, K.: Nucl. Instrum. Methods166, 397 (1979)

    Google Scholar 

  14. Northcliffe, L.C., Shilling, R.F.: Nucl. Data Tables7, 233 (1979)

    Google Scholar 

  15. Lederer, C.M., Shirley, V.S. (eds.): Table of Isotopes. New York: John Wiley & Sons 1978

    Google Scholar 

  16. Hofmann, S., Faust, W., Münzenberg, G., Reisdorf, W., Armbruster, P., Güttner, K., Ewald, H.: Z. Phys. A — Atoms and Nuclei291, 53 (1979)

    Google Scholar 

  17. Schmidt, K.-H., Sahm, C.C., Pielenz, K., Clerc, H.-G.: Z. Phys. A — Atoms and Nuclei316, 19 (1984)

    Google Scholar 

  18. Heßberger, F.P., Münzenberg, G., Hofmann, S., Reisdorf, W., Schmidt, K.-H., Schött, H.-J., Armbruster, P., Hingmann, R., Thuma, B., Vermeulen, D.: Z. Phys. A — Atoms and Nuclei321, 317 (1985)

    Google Scholar 

  19. Ghiorso, A., Nurmia, M., Harris, J., Eskola, K., Eskola, P.: Phys. Rev. Lett.22, 1317 (1969)

    Google Scholar 

  20. Bemis Jr., C.E., Silva, R.J., Hensley, D.C., Keller Jr., O.L., Tarrant, J.R., Hunt, L.D., Dittner, F.P., Hahn, R.L., Goodman, C.D.: Phys. Rev. Lett.31, 647 (1973)

    Google Scholar 

  21. Westmeier, W., Merklin, A.: Physics Data 29-1, ISSN 0344-8401, Karlsruhe (1985)

  22. Lemmertz, P., Alquist, L.J., Fass, R., Wollnik, H., Hirdes, D., Jungclas, H., Brandt, R., Schardt, D., Zylicz, J.: Z. Phys. A — Atoms and Nuclei298, 311 (1980)

    Google Scholar 

  23. Heßberger, F.P., Münzenberg, G., Hofmann, S., Agarwal, Y.K., Poppensieker, K., Reisdorf, W., Schmidt, K.-H., Schneider, J.R.H., Schneider, W.F.W., Schött, H.-J., Armbruster, P., Thuma, B., Sahm, C.C., Vermeulen, D.: Z. Phys. A — Atoms and Nuclei322, 557 (1985)

    Google Scholar 

  24. Kolesnikov, N.N., Demin, A.G.: Dubna Report P6-9421, JINR Dubna, 1975

  25. Rasmussen, J.O.: Phys. Rev.113, 1593 (1959)

    Google Scholar 

  26. Demin, A.G., Tretyakova, S.P., Utyonkov, U.K., Shirokovsky, I.V.: Z. Phys. A — Atoms and Nuclei315, 197 (1984)

    Google Scholar 

  27. Randrup, J., Larson, S.E., Møller, P., Nilsson, S.G., Pomorski, K., Sobiczewski, A.: Phys. Rev. C13, 229 (1976)

    Google Scholar 

  28. Møller, P., Nix, J.R.: At. Data Nucl. Data Tables26, 165 (1981)

    Google Scholar 

  29. Leander, G.A., Møller, P., Nix, J.R., Howard, W.M.: Proc. 7th Int. Conf. Atomic Masses Fundamental Constants, AMCO-7, Darmstadt, Germany 466 (1984)

  30. Møller, P., Nix, J.R.: Int. Report LA-UR-86-3983, Los Alamos National Laboratory (1986)

  31. Møller, P., Myers, W.D., Swiatecki, W.J., Treiner, J.: Int. Report LBL-22686; LBL, Berkeley 1986; At. Data Nucl. Data Tables (to be published)

  32. Wapstra, A.H., Audi, G.: Nucl. Phys. A432, 1 (1985)

    Google Scholar 

  33. Liran, S., Zeldes, N.: At. Data Nucl. Data Tables17, 431 (1976)

    Google Scholar 

  34. Armbruster, P.: Ann. Rev. Nucl. Sci.35, 135 (1985)

    Google Scholar 

  35. Armbruster, P.: In: From nuclei to stars. Soc. Ital. Fis., Bologna, Italy (1985)

    Google Scholar 

  36. Myers, W.D.: Droplet model of atomic nuclei. New York: IFI Plenum 1977

    Google Scholar 

  37. Cwiok, S., Pashkevich, V.V., Dudek, J., Nazarewicz, W.: Nucl. Phys. A410, 254 (1983)

    Google Scholar 

  38. Dahlinger, M., Vermeulen, D., Schmidt, K.-H.: Nucl. Phys. A376, 94 (1982)

    Google Scholar 

  39. Viola, V.E., Jr., Seaborg, G.T.: Nucl. Chem.28, 741 (1966)

    Google Scholar 

  40. Boenig, K., Patyk, Z., Sobiczewski, A., Cwiok, S.: Z. Phys. A — Atomic Nuclei325, 479 (1986)

    Google Scholar 

  41. Sobiczewski, A., Patyk, Z. A., Cwiok, S.: Phys. Lett. B186, 6 (1987)

    Google Scholar 

  42. Fiset, O.E., Nix, J.R.: Nucl. Phys. A193, 647 (1972)

    Google Scholar 

  43. Poenaru, D.M., Ivascu, M.: J. Phys.44, 791 (1983); At. Nucl. Data Tables34, 423 (1986)

    Google Scholar 

  44. Baran, A., Pomorski, K., Lukasiak, A., Sobiczewski., A.: Nucl. Phys. A361, 83 (1981)

    Google Scholar 

  45. Møller, P., Nix, J.R., Swiatecki, W.J.: Preprint LA-UR-86-3266, Los Alamos 1986, submitted to Nucl. Phys.

Download references

Author information

Authors and Affiliations

Authors

Additional information

The authors thank N. Angert and UNILAC staff for the excellent performance of the accelerator. We are indebted to W. Jacoby and M. Müller for the development of the highly-efficient sources for enriched material, and W. Hartmann and W. Thalheimer for the skilful preparation of the large-area Pb-targets. Further we are indebted to the GSI experimental electronics group, namely M. Richter for their helpful assistance. We also thank H.G. Burkhard, who is in charge of the mechanical setups at SHIP. One of the autors (M.E. Leino) expresses his gratitude to GSI for kind hospitality.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Münzenberg, G., Armbruster, P., Berthes, G. et al. Observation of the isotopes264108 and265108. Z. Physik A - Atomic Nuclei 328, 49–59 (1987). https://doi.org/10.1007/BF01295182

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01295182

PACS

Navigation