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Backbending in theN=96 isotones

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The backbending in the even-even,N=96 isotones can be quantitatively accounted for by the rotation-alignment of the spins of neutrons in i 13/2 orbits, as shown by comparing the aligned angular momentum and relative Routhian for thes-bands in these isotones and for the i 13/2 bands in the corresponding isotopes withN=91. The influence of protons on this backbending situation is shown to be indirect, acting through a change of the nuclear deformation, which yields a change of the moment of inertia of the g.s. band and of the non-rigid character of the rotation. The experimental data on theN=96 and 97 isotones are in reasonable agreement with cranking model calculations. Possible reasons for the inhibition of backbending in the h 9/2 proton bands in the odd-Z, N=96 isotones, all related to a change of deformation, are presented.

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References

  1. For a recent review of this subject, see for example: Lieder, R.M., Ryde, H.: Adv. Nucl. Phys., Vol. X, p. 1, Baranger, M., Vogt, E. (eds.). New York: Plenum Press 1978, and references therein

    Google Scholar 

  2. Stephens, F.S.: Rev. Mod. Phys.47, 43 (1975), and references therein

    Google Scholar 

  3. Stephens, F.S., Simon, R.S.: Nucl. Phys. A183, 257 (1972)

    Google Scholar 

  4. Grosse, E., Stephens, F.S., Diamond, R.M.: Phys. Rev. Lett.31, 840 (1973)

    Google Scholar 

  5. Beuscher, H., Davidson, W.F., Lieder, R.M., Neskakis, A., Mayer-Böricke, C.: Nucl. Phys. A249, 379 (1975)

    Google Scholar 

  6. Grosse, E., Stephens, F.S., Diamond, R.M.: Phys. Rev. Lett.32, 74 (1974)

    Google Scholar 

  7. Neskakis, A., Lieder, R.M., Müller-Veggian, M., Beuscher, H., Davidson, W.F., Mayer-Böricke, C.: Nucl. Phys. A261, 189 (1976)

    Google Scholar 

  8. Faessler, A., Ploszajczak, M., Sandhya-Devi, K.R.: Nucl. Phys. A301, 382 (1978)

    Google Scholar 

  9. André, S., Genevey-Rivier, J., Treherne, J., Jastrzebski, J., Kaczarowski, R., Lukasiak, J.: Phys. Rev.38, 327 (1977)

    Google Scholar 

  10. Kahler, A.C., Riedinger, L.L., Johnson, N.R., Robinson, R.L., Zganjar, E.F., Visvanathan, A., Zolnowski, D.R., Hughes, M.B., Sugihara, T.T.: private communication (1977)

  11. Riedinger, L.L., Smith, G.J., Stelson, P.H., Eichler, E., Hagemann, G.B., Hensley, D.C., Johnson, N.R., Robinson, R.L., Sayer, R.O.: Phys. Rev. Lett.33, 1346 (1974)

    Google Scholar 

  12. Richter, L., Backe, H., Kankeleit, E., Weik, F., Willwater, R.: Phys. Lett.71B, 74 (1977)

    Google Scholar 

  13. Rezanka, I., Ladenbauer-Bellis, I.M., Rasmussen, J.O., Ribbe, W., der Mateosian, E.: Phys. Rev. C11, 1767 (1975)

    Google Scholar 

  14. Johnson, A., Hjorth, S.A., Carlén, L., Ryde, H., Hagemann, G.B., Nieman, M.: Annual Report, p. 83. Stockholm: Research Institute of Physics 1977

    Google Scholar 

  15. Walker, P.M., Dracoulis, G.D., Johnston, A., Leight, J.R., Slacombe, M.G., Wright, I.F.: J. Phys. G4, 1655 (1978)

    Google Scholar 

  16. Bernthal, F., Back, B.B., Bakander, O., Borggreen, J., Pedersen, J., Sletten, G., Beuscher, H., Haenni, D., Lieder, R.: Phys. Lett.74B, 211 (1978)

    Google Scholar 

  17. Foin, C., André, S., Barnéoud, D.: Nucl. Phys. A289, 77 (1977)

    Google Scholar 

  18. Foin, C., André, S., Barnéoud, D.: Phys. Rev. Lett.35, 1697 (1975)

    Google Scholar 

  19. Foin, C., Barnéoud, D.: Phys. Rev. Lett.33, 1049 (1974);

    Google Scholar 

  20. Barnéoud, D., Foin, C.: Nucl. Phys. A287, 77 (1977)

    Google Scholar 

  21. Foin, C., Barnéoud, D., Hjorth, S.A., Béthoux, R.: Nucl. Phys. A199, 129 (1973)

    Google Scholar 

  22. Faessler, A., Sandhya-Devi, K.R., Barrosa, A.: Nucl. Phys. A286, 101 (1977)

    Google Scholar 

  23. Bengtsson, R., Frauendorf, S.: Nucl. Phys. A314, 27 (1979)

    Google Scholar 

  24. Bohr, A., Mottelson, B.R.: J. Phys. Soc. Jpn. Suppl.44, 157 (1978)

    Google Scholar 

  25. Bengtsson, R., Frauendorf, S.: Nucl. Phys. A327, 139 (1979)

    Google Scholar 

  26. Lee, I.Y., Cline, D., Simon, R.S., Butler, P.A., Colombani, P., Guidry, M.W., Stephens, F.S., Diamond, R.M., Johnson, N.R., Eichler, E.: Phys. Rev. Lett.37, 420 (1976)

    Google Scholar 

  27. Johnson, N.R., Cline, D., Yates, S.M., Stephens, F.S., Riedinger, L.L., Ronningen, R.M.: Phys. Rev. Lett.40, 151 (1978)

    Google Scholar 

  28. Kistner, O.C., Sunyar, A.W., der Mateosian, E.: Phys. Rev. C17, 1417 (1978)

    Google Scholar 

  29. Hjorth, S.A., Ryde, H., Hagemann, K.A., Lovhodien, G., Waddington, J.C.: Nucl. Phys. A144, 513 (1970)

    Google Scholar 

  30. Lieder, R.M., Beuscher, H., Davidson, W.F., Jahn, P., Probst, H.J., Mayer-Böricke, C.: Z. Phys.257, 147 (1972)

    Google Scholar 

  31. Saethre, O., Hjorth, S.A., Johnson, A., Jägare, S., Ryde, H., Szymanski, Z.: Nucl. Phys. A207, 486 (1973)

    Google Scholar 

  32. Walus, W., Roy, N., Jónsson, S., Carlen, L., Ryde, H., Hagemann, G.B., Herskind, B., Garnett, J.D., Chen, Y.S., Almberger, J., Leander, G.: Phys. Scr (to be published); and private communication

  33. Lindblad, T.: Nucl. Phys. A238, 287 (1975)

    Google Scholar 

  34. Lieder, R.M., Beuscher, H., Davidson, W.F., Neskakis, A., Mayer-Böricke, C.: Proceedings of the International Conference on Nuclear Physics, Münich 1973. de Boer, J., Mang, H.J. (eds.), Vol. 1, p. 188. Amsterdam: North Holland 1973

    Google Scholar 

  35. Michel, C., El Masri, Y., Janssens, R., Steyaert, J., Vervier, J.: Verhandl. Dtsch. Phys. Ges.3, 908 (1979)

    Google Scholar 

  36. Riedinger, L.L., Hensley, D.C., Stelson, P.H., Johnson, N.R., Hagemann, G.B., Robinson, R.L., Eichler, E., Sayer, R.O., Smith, G.T.: ORNL Phys. Div. Annu. Progr. Rep. 1973, ORNL-4937, 33 (1974); Eichler, E.: private communication

  37. Buyrn, A.: Nucl. Data Sheets,11, 327 (1974)

    Google Scholar 

  38. Bochev, B., Karamian, S.A., Kutsarova, T., Nadjakov, E., Oganessian, Y.T.: Nucl. Phys. A267, 344 (1976).

    Google Scholar 

  39. Bochev, B., Iliev, S., Kalpakchieva, R., Karamian, S.A., Kutsarova, T., Nadjakov, E., Venkova, T.: Nucl. Phys. A282, 159 (1977)

    Google Scholar 

  40. Michel, C.: Ph.D. Thesis, Louvain-la-Neuve (1979); Michel, C., El Masri, Y., Holzmann, R., Van Hove, M.A., Vervier, J.: Z. Phys. A298, 213 (1980)

  41. Bengtsson, R.: Proceedings of the International Conference on Nuclear Behaviour at High Angular Momentum, Strasbourg 1980. J. Phys. C10, 84 (1980)

    Google Scholar 

  42. Peker, L.L., Rasmussen, J.O., Hamilton, J.H.: Phys. Lett.91B, 365 (1980)

    Google Scholar 

  43. Harris, S.M.: Phys. Rev.138, B 509 (1965)

    Google Scholar 

  44. Mariscotti, M.A.J., Scharff-Goldhaber, G., Buck, B.: Phys. Rev.178, 1864 (1969)

    Google Scholar 

  45. Bohr, A., Mottelson, B.R.: Nuclear Structure. Nuclear deformations, Vol. 2, eq. (2.92). New York: W.A. Benjamin 1975

    Google Scholar 

  46. Wapstra, A.H., Gove, N.: Nucl. Data Tables9, 265 (1971)

    Google Scholar 

  47. Bengtsson, R., Frauendorf, S., May, F.R.: private communication through R. Bengtsson

  48. Riedinger, L.L., Andersen, O., Frauendorf, S., Garrett, J.D., Gaardhøji, J.J., Hagemann, G.B., Herskind, B., Makovetzky, Y.V.: Phys. Rev. Lett.44, 568 (1980)

    Google Scholar 

  49. Gustafson, C., Lamm, I.L., Nilsson, B., Nilsson, S.G.: Ark. Fys.36, 613 (1966)

    Google Scholar 

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Authors and Affiliations

  1. Institut de Physique Corpusculaire, Louvain-La-Neuve, Belgium

    C. Michel & J. Vervier

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  1. C. Michel
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  2. J. Vervier
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Additional information

The work described in the present paper is part of the Ph. D. thesis of C.M.

We thank Drs. Y. El Masri and R. Janssens for several fruitful discussions at the early stage of the present work, Professor A. Faessler and Drs. R. Bengtsson and W. Walus for communicating to us their results prior to publication, and Dr. R. Bengtsson for a very critical reading of the manuscript.

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Michel, C., Vervier, J. Backbending in theN=96 isotones. Z Physik A 299, 149–161 (1981). https://doi.org/10.1007/BF01440916

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  • DOI: https://doi.org/10.1007/BF01440916

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