Advertisement

Zeitschrift für Physik A Atomic Nuclei

, Volume 333, Issue 4, pp 339–348 | Cite as

Gamow-Teller decay of118Pd and of neighbouring even isotopes of palladium

  • V. Koponen
  • J. Äystö
  • J. Honkanen
  • P. Jauho
  • H. Penttilä
  • J. Suhonen
  • P. Taskinen
  • K. Rykaczewski
  • J. Żylicz
  • C. N. Davids
Nuclear Structure and Reactions

Abstract

Neutron-rich isotopes of palladium were produced via the fission of238U by 20 MeV protons. These isotopes were selected using the ion guide-fed on-line mass-separator facility IGISOL at Jyväskylä. Their decays were studied byβ-ray,γ-ray and conversion-electron spectroscopy. For114Pd and116Pd, the decay schemes established previously were confirmed; additionally multipolarities were determined for a few transitions. In the case of118Pd, only an approximate half-life was known from a previous radiochemical experiment. In the present study, 15 gamma transitions were observed, most of which were placed in a decay scheme. The half-life and the decay energy were found to beT1/2=1.9±0.1 s andQβ=4.0±0.2 MeV. The decay schemes of114Pd,116Pd and118Pd include — respectively — two, two and four 0+→1+ Gamow-Teller beta transitions with logft values between 4.1 and 5.1. The strength of these transitions is discussed in terms of the extreme single particle shell model with pairing and the spherical proton-neutron quasiparticle random phase approximation. The possible role of deformation is considered using a shell correction method. Predictions for the decay properties of the as yet unobserved120Pd are given.

PACS

23.40.Hc 21.10.Dr 21.10.Pc 27.60.+j 29.30.Kv 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Proceedings of the 5th International Conference on Nuclei far from Stability. Towner, I.S. (ed.). New York: American Institute of Physics 1988Google Scholar
  2. 2.
    Kratz, K.-L., Thielmann, F.-K., Hillebrandt, W., Möller, P., Harms, V., Wöhr, A., Truran, J.W.: Proceedings of the 6th Conference on Capture Gamma-Ray Spectroscopy, Leuven, Belgium, August 1987, Institute of Physics, Bristol 1988. J. Phys. G. Suppl.14, S331 (1988)Google Scholar
  3. 3.
    Äystö, J., Taskinen, P., Yoshii, M., Honkanen, J., Jauho, P., Ärje, J., Valli, K.: Nucl. Instrum. Methods B26, 394 (1987)Google Scholar
  4. 4.
    Rykaczewski, K., Plochocki, A., Grant, I.S., Gabelmann, H., Barden, R., Schardt, D., Zylicz, J., Nyman, G.: Z. Phys. A — Atomic Nuclei332, 275 (1989)Google Scholar
  5. 5.
    Weiss, H.V., Ballou, N.E., Elzie, J.L., Fresco, J.M.: Phys. Rev.188, 1893 (1969)Google Scholar
  6. 6.
    Hill, J.C.: In: Proceedings of the Isotope Separator on-line Workshop. Chrien, R.E. (ed.), p. 169. Brookhaven: BNL 50847 (1977) (unpublished)Google Scholar
  7. 7.
    Fogelberg, B., Bäcklin, A., Nagarajan, T.: Phys. Lett.36B, 334 (1971)Google Scholar
  8. 8.
    Rösel, F., Fries, H.M., Alder, K., Pauli, H.C.: At. Data Nucl. Data Tables21, 91 (1978)Google Scholar
  9. 9.
    Lederer, C.M., Shirley, V.S. (eds.): Table of isotopes. 7th Edn. New York: Wiley 1978Google Scholar
  10. 10.
    Wapstra, A.H., Audi, G.: Nucl. Phys. A432, 1 (1985)Google Scholar
  11. 11.
    Aleklett, K., Lund, E., Rudstam, G.: Phys. Rev. C18, 462 (1978)Google Scholar
  12. 12.
    Davids, C.N., Norman, E.B., Pardo, R.C., Parks, L.A.: Proceedings of the 3rd Conference on Nuclei far from Stability, Cargèse 1976. Klapisch, R. (ed.), p. 590. Geneva: CERN 76-13Google Scholar
  13. 13.
    Brüchle, W.: Thesis, University of Mainz (1975)Google Scholar
  14. 14.
    Rogowski, J., Hill, P., Kaffrell, N, Tetzlaff, H., Trautmann, N., Höglund, S., Skarnemark, G., Alstad, J., De Gelder, P., Jacobs, E., Daniels, W.R.: Institute of Nuclear Chemistry, p. 8. University of Mainz. Annual Report (1985)Google Scholar
  15. 15.
    Meikrantz, D.H., Gehrke, R.J., McIsaac, L.D., Baker, J.D., Greenwood, R.C.: Radiochim. Acta29, 93 (1981)Google Scholar
  16. 16.
    Wallace, G., McCallum, G.J., Chapman, N.G.: Nucl. Phys. A184, 166 (1972)Google Scholar
  17. 17.
    Äystö, J., Davids, C.N., Hattula, J., Honkanen, J., Honkanen, K., Jauho, P., Julin, R., Juutinen, S., Kumpulainen, J., Lönnroth, T., Pakkanen, A., Passoja, A., Penttilä, H., Taskinen, P., Verho, E., Virtanen, A., Yoshii, M.: Nucl. Phys. A480, 104 (1988)Google Scholar
  18. 18.
    Towner, I.S.: Nucl. Phys. A444, 402 (1985)Google Scholar
  19. 19.
    Kalinowski, Ł.: In: Proceedings of the International Workshop on Nuclear Structure of the Zirconium Region. Eberth, J., Meyer, R.A., Sistemich, K. (eds.), p. 397. Berlin, Heidelberg, New York: Springer 1988Google Scholar
  20. 20.
    Bengtsson, R., Ragnarsson, I.: Phys. Scr. T5, 165 (1983)Google Scholar
  21. 21.
    Jensen, A.S., Hansen, P.G., Jonson, B.: Nucl. Phys. A431, 393 (1984)Google Scholar
  22. 22.
    Suhonen, J., Taigel, T., Faessler, A.: Nucl. Phys. A486, 91 (1988)Google Scholar
  23. 23.
    Cha, D.: Phys. Rev. C27, 2269 (1983)Google Scholar
  24. 24.
    Vogel, P., Zirnbauer, M.R.: Phys. Rev. Lett.57, 3148 (1986)Google Scholar
  25. 25.
    Tomoda, T., Faessler, A.: Phys. Lett.199B, 475 (1987)Google Scholar
  26. 26.
    Dobaczewski, J., Nazarewicz, W., Płochocki, A., Rykaczewski, K., Zylicz, J.: Z. Phys. A — Atomic Nuclei329, 267 (1988)Google Scholar
  27. 27.
    Myers, W.D., Swiatecki, W.: Nucl. Phys.81, 1 (1966); Ark. Fys.36, 343 (1967)Google Scholar
  28. 28.
    Möller, P., Nix, J.R.: At. Data Nucl. Data Tables26, 165 (1981)Google Scholar
  29. 29.
    Dudek, J., Szymanski, Z., Werner, T.: Phys. Rev. C23, 920 (1981)Google Scholar
  30. 30.
    Äystö, J., Jauho, P., Koponen, V., Penttilä, H., Rykaczewski, K., Taskinen, P., Zylicz, J.: In: Proceedings of the International Workshop on Nuclear Structure of the Zirconium Region. Eberth, J., Meyer, R.A., Sistemich, K. (eds.), p. 409. Berlin, Heidelberg, New York: Springer 1988Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • V. Koponen
    • 1
  • J. Äystö
    • 1
  • J. Honkanen
    • 1
  • P. Jauho
    • 1
  • H. Penttilä
    • 1
  • J. Suhonen
    • 1
  • P. Taskinen
    • 1
  • K. Rykaczewski
    • 2
  • J. Żylicz
    • 2
  • C. N. Davids
    • 3
  1. 1.Department of PhysicsUniversity of JyväskyläJyväskyläFinland
  2. 2.Institute of Experimental PhysicsWarsaw UniversityWarsawPoland
  3. 3.Argonne National LaboratoryArgonneUSA

Personalised recommendations