Abstract
Positive and negative parity yrast states are studied in 15668 Er88 with a particle number projected Hartree-Fock-Bogoliubov method constrained on an average angular momentum. The theory predicts a second anomaly of the positive parity yrast states due to the alignment of ah 11/2 proton pair. The double backbending in the negative yrast band is understood: AtJ π=9− to 11− it is due to the intersection of the (πg 7/27/2+)×(πh 11/27/2−) and the (πi 13/21/2+)×(πh 9/23/2−) 2q.p. bands. The second backbending found experimentally fromJ π=21− to 23− is connected with an alignment of ai 13/2 neutron pair of the core in the proton 2q.p. band.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Lieder, R.M., Ryde, H.: Jülich preprint (1977)
Stephens, F.S., Simon, R.S.: Nucl. Phys. A138, 257 (1972)
Mottelson, R.R., Valatin, J.G.: Phys. Lett.5, 511 (1960)
Goswami, A., Liu, L., Struble, G.L.: Phys. Lett25 B, 451 (1967)
Mang, H.J.: Phys. Rep. C18, 325 (1975)
Faessler, A., Sandhya Devi, K.R., Grümmer, F., Schmid, K.W., Hilton, R.R.: Nucl. Phys. A256, 106 (1976)
Faessler, A., Sandhya Devi, K.R., Barroso, A.: To be published in Nucl. Phys.
Baranger, M., Kumar, K.: Nucl. Phys.62, 113 (1965);
Baranger, M., Kumar, K.: Nucl. Phys. A110, 490 (1968);
Kumar, K., Baranger, M.: Nucl. Phys. A110, 529 (1968)
Beuscher, H., Davidson, W.F., Lieder, R.M., Mayer-Böricke, C., Ihle, H.: Z. Physik263, 201 (1973)
Gono, Y., Zolnowski, D.R., Heanni, D.R., Sugihara, T.T.: Phys. Lett.49B, 338 (1974)
Sunyar, A.W., der Mateosian, E., Kistner, O.C., Johnson, A., Lumpkin, A.H., Thieberger, P.: Phys. Lett.62B, 283 (1976);
Sunyar, A.W., BNL, Brookhaven, private communication to Lieder, R.M., and Ryde, H., 1975
Lee, I.Y., Aleonort, M., El Masri, A., Newton, J.O., Simon, R., Diamond, D., Stephens, F.S., private communications by Stephens, F.S., and Simon, R.
Krumlinde, J., Marshalek, E.R.: Nucl. Phys. A275, 395 (1977)
Wakai, M., Faessler, A.: To be published
Faessler, A., Ploszajczak, M.: To be published
Zolnowski, D.R., Kishimoto, T., Gono, Y., Sugihara, T.T.: Phys. Lett.33B, 453 (1975)
De Voigt, M.J.A., Sujkowski, Z., Chmielewska, D., Jansen, J.F.W., van Klinken, J., Feenstra, S.J.: Phys. Lett.59B, 137 (1975)
Nomura, M.: Phys. Lett.55B, 357 (1975)
Arima, A., Iachello, F.: Phys. Rev. Lett.35, 1069 (1975)
Neergård, K., Vogel, P., Radomski, M.: Nucl. Phys. A238, 199 (1975)
Vogel, P.: Phys. Lett.60B, 431 (1976)
Flaum, C., Cline, D., Sunyar, A.W., Kistner, O.L.: Phys. Rev. Lett.33, 973 (1974)
Sorensen, R.A.: In Proc. Orsay Colloquium on Intermediate Nuclei, July 1971, p. 71
Author information
Authors and Affiliations
Additional information
Work supported in part by USERDA contract No. E(11-1)-3001
We wish to thank Dr. K.R. Sandhya Devi for numerous discussions and Dr. M. Anastasio for a critical reading of the manuscript.
Rights and permissions
About this article
Cite this article
Ploszajczak, M., Faessler, A. Description of negative parity yrast states in156Er. Z Physik A 283, 349–356 (1977). https://doi.org/10.1007/BF01409514
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01409514