Skip to main content
Log in

Gamow-Teller beta decay of the very neutron-deficientN=50 nuclide98Cd

  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

For the first time, detailed decay-spectroscopic investigations were performed for the very neutron-deficientN=50 nuclide98Cd. The98Cd activity was produced in spallation reactions between 600 MeV protons and a natural tin target, yielding a98Cd beam intensity of 10 to 60 atoms/s at the collector of the ISOLDE massseparator. By means ofγ-ray and conversion-electron spectroscopy, 19 transitions were found to follow the β+/EC decay98Cd→98Ag. The transitions at 61 and 107 keV were shown to beM1(+E2) andE2, respectively, and the98Cd half-life was measured as 9.2±0.3 s. TheQ EC value of98Cd is determined semiempirically and is compared to model predictions together with the measuredQ EC values of the neighbouring cadmium isotopes100,102Cd and theN=50 isotones92Mo,94Ru, and96Pd, taken from the literature. The newly established decay scheme of98Cd includes 9 excited states of98Ag. Four states at 1691, 1861, 2164, and 2544 keV are directly fed by 0+ → 1+ Gamow-Teller beta transitions with a summed strength of 3.5 +0.8−0.7 . This value corresponds to 25±5% of the strength predicted for the GT transformation of a g9/2 proton (in98Cd) into a g7/2 neutron (in98Ag) by the extreme single-particle shell model. The GT-strength splitting and quenching, observed for98Cd, are compared with the corresponding data for lighter even-even N=50 isotones, and are discussed with reference to the predictions of more sophisticated nuclear models. We find that only in some cases it is possible to explain qualitatively the observed GT strength distribution and its total magnitude without renormalizing the free-neutron value of the axial-vector coupling constant.

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. Blomqvist, J.: GSI lecture (1984) (unpublished)

  2. Towner, I.S.: Nucl. Phys. A444, 402 (1985)

    Google Scholar 

  3. Kalinowski, L.: Proc. Int. Workshop on Nuclear Structure of the Zirconium Region. Ebert, J., Meyer, R.A., Sistemich, K. (eds.), p. 397. Berlin, Heidelberg, New York: Springer 1988

    Google Scholar 

  4. Graf, P., Münzel, H.: Radiochim. Acta20, 140 (1987)

    Google Scholar 

  5. Rykaczewski, K., Grant, I.S., Kirchner, R., Klepper, O., Koslowsky, V.T., Larsson, P.O., Nolte, E., Nyman, G., Roeckl, E., Schardt, D., Spanier, L., Tidemand-Petersson, P., Zganjar, E.F., Żylicz, J.: Z. Phys. A — Atoms and Nuclei322, 263 (1985)

    Google Scholar 

  6. Elmroth, T., Hagberg, E., Hansen, P.G., Hardy, J.C., Jonson, B., Ravn, H.L., Tidemand-Petersson, P.: Nucl. Phys. A304, 493 (1978)

    Google Scholar 

  7. Rykaczewski, K., Płochocki, A., Grant, I.S., Gabelmann, H., Barden, R., Schardt, D., Żylicz, J., Nyman, G.: Z. Phys. A — Atomic Nuclei332, 275 (1989)

    Google Scholar 

  8. Ravn, H.L.: Proceedings of a Workshop on the ISOLDE Programme. Allardyce, B.W., Hansen, P.G., Jonson, B., Kluge, H.-J., Ravn, H.L. (eds.) Zinal, Switzerland, June 18–22, 1984.

    Google Scholar 

  9. Barden, R.: Thesis, Johannes-Gutenberg Universität, Mainz 1988 and GSI-Report, GSI88-18 (1988)

    Google Scholar 

  10. Rösel, F., Fries, H.M., Alder, K., Pauli, H.C.: At. Data Nucl. Data Tables21, 110 (1978)

    Google Scholar 

  11. Lederer, C.M., Shirley, V.S.: Table of isotopes, 7th edn. New York: Wiley 1978

    Google Scholar 

  12. Piel, W.F. Jr., Fossan, D.B., Ma, R., Paul, E.S., Xu, N., McGrory, J.B.: Phys. Rev.41, 1223 (1990)

    Google Scholar 

  13. Gloeckner, D.H., Serduke, F.J.D.: Nucl. Phys. A220, 477 (1974)

    Google Scholar 

  14. Blomqvist, J., Rydström, L.: Phys. Scr.31, 31 (1985)

    Google Scholar 

  15. X-Ji, Wildenthal, B.H.: Phys. Rev. C37, 1256 (1988)

    Google Scholar 

  16. Skouras, L.D., Dedes, C.: Phys. Rev. C15, 1873 (1977)

    Google Scholar 

  17. Schubart, R., Alber, D., Alfier, R., Bach, C., Fossan, D.B., Grawe, H., Kluge, H., Maier, K.H., Schramm, M., Waring, M., Wood, L.: Z. Phys. A — Hadrons and Nuclei340, 109 (1991)

    Google Scholar 

  18. Alber, D., Berger, A., Bertschat, A.A., Grawe, H., Haas, H., Kluge, H., Kuhnert, A., Mahnke, H.E., Maier, K.H., Schubart, R., Spellmeyer, B., Sun, X., Wood, L.: Nuclear structure study of the neutron-deficient cadmium isotopes100,101,102Cd (to be published)

  19. Alfier, R., Alber, D., Grawe, H., Kluge, H., Maier, K.H., Schubart, R., Fossan, D.B., Piel Jr., W.F.: In beam spectroscopy of neutron-deficient100Ag (to be published in Z. Phys. A — Hadrons and Nuclei)

  20. Skouras, L.D., Manakos, P.: Shell-model calculations of β+ decay of the proton-rich nucleus98Cd. Internal Report IKDA91/5 (1991)

  21. Wapstra, A.H., Audi, G., Hoekstra, R.: At. Data and Nucl. Data Tables39, 281 (1988)

    Google Scholar 

  22. Keller, H., Barden, R., Kirchner, R., Klepper, O., Roeckl, E., Schardt, D., Grant, I.S., Płochocki, A., Rykaczewski, K., Szerypo, J., Żylicz, J.: Z. Phys. A — Hadrons and Nuclei339, 355 (1991)

    Google Scholar 

  23. Dobaczewski, J., Nazarewicz, W., Płochocki, A., Rykaczewski, K., Żylicz, J.: Z. Phys. A — Atomic Nuclei329, 267 (1988)

    Google Scholar 

  24. Haustein, E. (ed.): 1986–1987 Atomic mass predictions. At. Data Nucl. Data Tables39, 185 (1988)

  25. de Shalit, A., Talmi, I.: Nuclear shell theory. New York, London: Academic Press 1963

    Google Scholar 

  26. Bohr, A., Mottelson, B.R.: Nuclear structure, vol. 1, p. 349. New York: Benjamin Press 1969

    Google Scholar 

  27. Häusser, O.: Proc. Fifth Int. Conf. on Nuclei far from Stability. Towner, I.S. (ed.) AIP Conference Proceedings vol. 164, p. 604. New York: American Institute of Physics 1988

    Google Scholar 

  28. Suhonen, J., Taigel, T., Faessler, A.: Nucl. Phys. A486, 91 (1988)

    Google Scholar 

  29. Kuzmin, V.A., Soloviev, V.G.: Modern Phys. Lett. A3, 1533 (1988)

    Google Scholar 

  30. Borzov, I.N., Trykov, E.L., Fayans, S.A.: Sov. J. Phys. (in press)

  31. Soloviev, V.G.: Nuclear Physics, Neutron Physics and Nuclear Energy, Andrejtscheff, N., Elenkov, D. (eds.), p. 137. Singapore: World Scientific 1990

    Google Scholar 

  32. Suhonen, J.: Phys. Lett. B255, 159 (1991)

    Google Scholar 

  33. Barden, R., Kirchner, R., Klepper, O., Płochocki, A., Rathke, G.-E., Roeckl, E., Rykaczewski, K., Schardt, D., Żylicz, J.: Z. Phys. A — Atomic Nuclei329, 319 (1988)

    Google Scholar 

  34. Johnstone, I.P.: Phys. Rev. C44, 1476 (1991)

    Google Scholar 

  35. Cha, D.: Phys. Rev. C27, 2269 (1983)

    Google Scholar 

  36. Hirsch, M., Staudt, A., Muto, K., Klapdor-Kleingrothaus, H.V.: Proc. 6th Workshop on Nuclear Astrophysics, Ringberg, Febr. 1991. Internal Report MPIH-V11-1991. (in print) and Hirsch, M.: Private communication 1991

  37. Klepper, O., Rykaczewski, K.: Recent Advances in Nuclear Structure, Bucurescu, D., Cata-Danil, G., Zamfin, N.V. (eds.), p. 45. Singapore: World Scientific 1991

    Google Scholar 

  38. Rykaczewski, K., Barden, R., Gabelmann, H., Grant, I.S., Hill, P., Keller, H., Kirchner, R., Klepper, O., Kolasinski, A., Pfützner, M., Płochocki, A., Ravn, H., Roeckl, E., Schardt, D., Szerypo, J., Thorsteinsen, T., Żylicz, J.: Nuclear and Atomic Physics with the Accelerators of the Nineties, Proc. 21st Int. Summer School on Nuclear Physics, Mikolajki, Aug. 26–Sept. 5, 1990. Sujkowski, Z., Szeflinska, G. (eds.), p. 189. Bristol, Philadelphia, New York: A. Hilger 1991

    Google Scholar 

  39. Alber, D., Bentschat, H.H., Grawe, H., Haas, H., Spellmeyen, B., Sun, X.: Z. Phys. A — Atoms and Nuclei335, 265 (1990)

    Google Scholar 

  40. Adelberger, E.G., Garcia, A., Magnus, P.V., Wells, D.P.: Phys. Rev. Lett.67, 3658 (1991)

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Consortia

Additional information

Dedicated to Prof. P. Armbruster on the occasion of his 60th birthday

Rights and permissions

Reprints and permissions

About this article

Cite this article

Płochocki, A., Rykaczewski, K., Batsch, T. et al. Gamow-Teller beta decay of the very neutron-deficientN=50 nuclide98Cd. Z. Physik A - Hadrons and Nuclei 342, 43–51 (1992). https://doi.org/10.1007/BF01294487

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01294487

PACS

Navigation