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Decay properties of very-high-spin states in transitional Er nuclei aroundA=154

  • Nuclei
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

Theγ ray continuum structures of the transitional Er isotopes withA∼154 are studied using the reaction74Ge(84Kr,xn)158−xEr atE lab=340 MeV. The measurements include energy spectra, total energies, multiplicities, angular distributions and lifetimes using the DSAM method. The analysis of data confirms the previously observed two-bump structure of the continuum radiation. A meticulous subtraction of discrete contributions proves the persistence of the low-energy bump even at high spins, i.e.I>40ħ. The angular-distribution measurements assign predominant dipole structure to the bump atE γ=0.65 MeV, whereas the bump atE γ=1.3 MeV is of almost pure quadrupole character at high spins. The lifetime measurements give evidence for a strong enhancement of theB(E2) values of the upper bump,B(E2)/B sp>130. Spin-selection studies reveal, in the spin rangeI=30−50ħ an almost constant energy for the 1.3 MeV bump,ΔE<60 keV.

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References

  1. Borggreen, J., Bjørnholm, S., Christensen, O., Del Zoppo, A., Herskind, B., Pedersen, J., Sletten, G., Folkmann, F., Simon, R.S.: Z. Phys. A — Atoms and Nuclei294, 113 (1980)

    Google Scholar 

  2. Daly, P.: Proceedings of the 5th Nordic Meeting on Nuclear Physics (Jyväskylä, Finland, 1984) p. 5

  3. Beck, F.A., Dudek, J., Haas, B., Merdinger, J.C., Nourredine, A., Schutz, Y., Vivien, J.P., Hubert, Ph., Dassié, D., Bastin, G., Nguyen, L., Thibaud, J.P., Nazarewicz, W.: Z. Phys. A — Atoms and Nuclei319, 119 (1984)

    Google Scholar 

  4. Burde, J., Dines, E.L., Shih, S., Diamond, R.M., Draper, J.E., Lindenberger, K.H., Schück, C., Stephens, F.S.: Phys. Rev. Lett.48, 8 (1982)

    Google Scholar 

  5. Aguer, P., Bastin, G., Thibaud, J.P., Barnéoud, D., Boutet, J., Foin, C.: J. Phys. G; Nucl. Phys.3, L157 (1977); Z. Phys. A — Atoms and Nuclei285, 59 (1978)

    Google Scholar 

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

    Google Scholar 

  7. Bastin, G., Péghaire, A., Thibaud, J.P., André, S., Barnéoud, D., Foin, C., Aguer, P.: Nucl. Phys. A345, 302 (1980)

    Google Scholar 

  8. Horn, D., Young, G.R., Lister, C.J., Baktash, C.: Phys. Rev. C23, 1040 (1981)

    Google Scholar 

  9. Foin, C., André, S., Barnéoud, D., Bastin, G., Péghaire, A., Thibaud, J.P.: Z. Phys. A — Atoms and Nuclei305, 81 (1982)

    Google Scholar 

  10. Dafni, E., Bendahan, J., Broude, C., Goldring, G., Hass, M., Nairn, E., Rafailovich, M.H., Chasman, C., Kistner, O., Vajda, S.: Phys. Rev. Lett.53, 2473 (1984)

    Google Scholar 

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

    Google Scholar 

  12. Aguer, P., Bastin, G., Charmant, A., El Masri, Y., Hubert, Ph., Janssens, R., Michel, C., Thibaud, J.P., Vervier, J.: Phys. Lett.82 B, 55 (1979)

    Google Scholar 

  13. Nguyen, L., Sergolle, H., Aguer, P., Auger, G., Bastin, G., Lönnroth, T., Thibaud, J.P., Thomé, L.: Z. Phys. A — Atoms and Nuclei309, 207 (1983)

    Google Scholar 

  14. Häusser, O., Ward, D., Andrews, H.R., Taras, P., Deleplanque, M.A., Haas, B., Diamond, R.M., Dines, E.L., Machiavelli, A.O., McDonald, R., Stephens, F.S., Stager, C.U.: Phys. Lett.144 B, 341 (1984)

    Google Scholar 

  15. Deleplanque, M.A., Husson, J.P., Perrin, N., Stephens, F.S., Bastin, G., Schück, C., Thibaud, J.P., Hildingsson, L., Hjorth, S., Johnson, A., Lindblad, Th.: Phys. Rev. Lett.43, 1001 (1979)

    Google Scholar 

  16. Aguer, P., Bastin, G., Péghaire, A., Thibaud, J.P., Perrin, N., Sergolle, H., Hubert, Ph.: Phys. Scr.24, 180 (1981)

    Google Scholar 

  17. Thibaud, J.P., Aguer, P., Bastin, G., Nguyen, L., Perrin, N., Sergolle, H., Gizon, J., Hubert, Ph., Villard, M.M.: Z. Phys. A — Atoms and Nuclei321, 275 (1985)

    Google Scholar 

  18. Bohr, Aa., Mottelson, B.R.: Phys. Scr.24, 71 (1981)

    Google Scholar 

  19. Cwiok, S.: Z. Phys. A — Atoms and Nuclei314, 337 (1983)

    Google Scholar 

  20. Andersson, C.G., Bengtsson, R., Bengtsson, T., Krumlinde, J., Leander, G., Neergard, K., Olanders, P., Pinston, J.A., Ragnarsson, I., Szymanski, Z., Aberg, S.: Phys. Scr. A24, 266 (1981)

    Google Scholar 

  21. Hübel, H., Smilansky, U., Diamond, R.M., Stephens, F.S., Herskind, B.: Phys. Rev. Lett.41, 791 (1978)

    Google Scholar 

  22. Hübel, H., Diamond, R.M., Aguer, P., Ellegaard, C., Fossan, D.B., Kluge, H., Schück, C., Shih, S., Stephens, F.S., Smilansky, U.: Z. Phys. A — Atoms and Nuclei304, 225 (1982)

    Google Scholar 

  23. Kroth, R., Aguer, P., Bastin, G., Hübel, H., Nguyen, L., Sergolle, H., Thibaud, J.P.: Proceedings of the International Conference on High Angular Momentum Properties of nuclei (Oak Ridge, 1982), p. 357

  24. Bogaert, G., Aguer, P., Bastin, G., Hildingsson, L., Kroth, R., Lönnroth, T., Nguyen, L., Sergolle, H., Soramel, F., Thibaud, J.P.: Workshop on Electromagnetic Properties of High Spin Nuclear Levels (Rehovot, Israel, 1984)

  25. Meunier, R., Daban-Haurou, J.L., Salomé, M., Nickel, F.: Nucl. Instrum. Methods186, 7 (1981)

    Google Scholar 

  26. Pouthas, J.: Nucl. Instrum. Methods135, 167 (1976)

    Google Scholar 

  27. Nguyen, L.: Thèse 3ème cycle (Orsay, 1982), unpublished

  28. Bogaert, G.: Thèse 3ème cycle n∘ 3709 (Orsay, 1984), unpublished

  29. Mollenauer, J.F.: Phys. Rev.127, 687 (1962)

    Google Scholar 

  30. Lindhard, J., Scharff, M., Schiott, H.E.: K. Dan. Viddens. Selsk. Mat. Fys. Medd.33, 14 (1963)

    Google Scholar 

  31. Northcliffe, L.C., Schilling, R.F.: Nucl. Data Tables A7, 233 (1970)

    Google Scholar 

  32. Körner, H.J., Hillis, D.L., Roulet, C., Aguer, P., Ellegaard, C., Fossan, D.B., Habs, D., Neiman, M., Stephens, F.S., Diamond, R.M.: Phys. Rev. Lett.43, 490 (1979)

    Google Scholar 

  33. Fewell, M.P., Baktash, C., Guidry, M.W., Hattula, J.S., Johnson, N.R., Lee, I.Y., McGowan, F.K., Ower, H., Pancholi, S.C., Riedinger, L.L., Wells, J.C.: Proceedings of the International Conference on High Angular Momentum Properties of Nuclei (Oak Ridge, 1982), p. 69

  34. Dudek, J., Nazarewicz, W.: Phys. Rev. C31, 298 (1985)

    Google Scholar 

  35. Lee, I.Y.: Proceedings of the International Conference on High Angular Momentum Properties of Nuclei (Oak Ridge, 1982), p. 339

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Bogaert, G., Aguer, P., Bastin, G. et al. Decay properties of very-high-spin states in transitional Er nuclei aroundA=154. Z. Physik A - Atomic Nuclei 324, 107–116 (1986). https://doi.org/10.1007/BF01290761

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