Abstract
The strongly shape driving πh9/2[541]l/2− configuration with α=+1/2 exhibits some anomalous, and so far unexplained, features concerning the crossing frequency, ħωc, the aligned angular momentum, ix, and interaction strength, at the alignment of the first pair of i13/2 quasineutrons in several odd-Z rare earth-nuclei. The h9/2[541]1/2− and h11/2[523]7/2− bands have been studied in the stably deformed rare-earth nucleus163Tm to investigate these features. A difference in band crossing frequency of ∼ 80 keV between the two bands is found. Rotational bands built on these two configurations have been found to cross in the spin range I=25/2–29/2 ħ. Theγ-decay pattern between the two bands is established in the crossing region and analysed in terms of a moderate shape difference between them. A theoretical estimate of the size of the interaction strength between the two bands is presented and compared to the experimental value. The observed band structure in163Tm is very similar to that of167Lu which has 2 protons and 2 neutrons in addition. This observation is discussed in relation to the similarity of the yrast bands of the two even-even “core” nuclei162Er and166Yb, for which theγ-transition energies are identical within ∼0.2 keV below the vi13/2 crossing.
Similar content being viewed by others
References
Nazarewicz, W., Riley, M.A., Garrett, J.D.: Nucl. Phys. A512, 61 (1990)
Radford, D.C., Andrews, H.R., Ball, G.C., Horn, D., Ward, D., Flibotte, S., Taras, P., Johansson, J., Tucker, D., Waddington, J.C.: Atomic Energy of Canada Limited: Chalk River Nuclear Laboratories Progress Report, Physics and Health Sciences, Physics Section, January–June 1988 (AECL-9758), p. 3
Gascon, J., Yu, C.-H., Hagemann, G.B., Carpenter, M.C., Espino, J.M., Iwata, Y., Komatsubara, T., Nyberg, J., Ogaza, S., Sletten, G., Tjøm, P.O., Radford, D.C., Simpson, J., Alderson, A., Bentley, M.A., Fallon, P., Forsyth, P.D., Roberts, J.W., Sharpey-Schafer, J.F.: Nucl. Phys. A513, 344 (1990)
Yu, C.-H., Hagemann, G.B., Espino, J.M., Furuno, K., Garrett, J.D., Chapman, R., Clarke, D., Khazaie, F., Lisle, J.C., Mo, J.N., Bergström, M., Carlén, L., Ekström, P., Lyttkens, J., Ryde, H.: Nucl. Phys. A511, 157 (1990)
Yu, C.-H.: Private communication (1991)
Bengtsson, R.: J. Phys. (Colloq.) C10, 87 (1980); Nilsson, S.G., Tsang, C.F.: Nucl. Phys. A131, 1 (1969)
Bengtsson, T., Ragnasson, L.: Nucl. Phys. A436, 14 (1985)
Herskind, B.: Nucl. Phys. A447, 395c (1986)
Sletten, G., Gascon, J., Nyberg, J.: Proc. of the Int. Conf. on the Spectroscopy of Heavy Nuclei, June 1989, Crete. Institute of Physics, Conference Series Number 105, p. 125
Chapman, R., Newton, J.O., Lisle, J.C., Mo, J.N., Paul, E., Garrett, J.D., Hagemann, G.B., Herkind, B., Nelson, A.: In: Proc. of the International Nucl. Phys. Conf., Harrogate, U.K. 1986, vol. 1, p. 161; (and to be published)
Foin, C., Andre, S., Barneoud, D.: Nucl. Phys. A289, 77 (1977); Nucl. Data Sheets 56-2, 403 (1989)
Jensen, H.J., Hagemann, G.B., Tjøm, P.O., Atac, A., Bergström, M., Bracco, A., Brockstedt, A., Carlsson, H., Ekström, P., Espino, J.M., Herskind, B., Ingebretsen, F., Jongman, J., Leoni, S., Lieder, R.M., Lönnroth, T., Maj, A., Million, B., Nordlund, A., Nyberg, J., Piiparinen, M., Ryde, H., Sugawara, M., Virtanen, A.: (to be published)
Frandsen, P., Chapman, R., Garrett, J.D., Gaardhøje, J.J., Hagemann, G.B., Herskind, B.: Nucl. Phys. A489, 508 (1988)
Smith, A.G., Chapman, R., Copnell, J., Freeman, S.J., Irwin, J., Khazaie, F., Lisle, J.C., Li, G.S., Mo, J.N., Tenreiro, C., Yuan, G.J., Hagemann, G.B.: Daresbury Ann. Rep. (1990)
Li, S.G., Yang, C.-X., Chapman, R., Khazaie, F., Lisle, J.C., Mo, J.N., Garrett, J.D., Hagemann, G.B., Herskind, B., Ryde, H.: Manchester Ann. Rep., p. 52 (1987)
Yuan, G.-J., Li, G.S., Wen, S.-X., Li, S.-G., Hua, P.-F., Zhou, L., Wu, P., Zhang, L.-K., Yu, Z.-K., Yu, P.-S., Wen, P.-K., Yang, C.-X.: Chinese J. Nucl. Phys.11, 1 (1989)
Bacelar, J.C., Chapman, R., Leslie, J.R., Lisle, J.C., Mo, J.N., Paul, E., Simcock, A., Willmott, J.C., Garrett, J.D., Hagemann, G.B., Herskind, B., Holm, A., Walker, P.M.: Nucl. Phys. A442, 547 (1985)
Bark, R.A., Dracoulis, G.D., Stuchberry, A.E., Byrne, A.P., Baxter, A.M., Riess, F., Weng, P.K.: J. Phys. G15, L169 (1989)
Walus, W., Carlén, L., Jönsson, S., Lyttkens, J., Ryde, H., Kownacki, J., Nazarewicz, W., Bacelar, J.C., Dudek, J., Garrett, J.D., Hagemann, G.B., Herskind, B., Yang, C.-X.: Phys. Scripta34, 710 (1986)
Bentsson, R., Frauendorf, S.: Nucl. Phys. A314, 27 (1979)
Raman, S., Malarkey, C.H., Milner, W.T., Nestor, C.W. Jr., Stelson, P.: At. Data Nucl. Data Tables36, 1 (1987)
Wapstra, A.H., Audi, G., Hoekstra, R.: At. Data Nucl. Data Tables39, 281 (1988)
Löbner, K.E.G., Vetter, M., Hönig, V.: At. Data Nucl. Data Tables A7, 495 (1970)
Bengtsson, R., Frauendorf, S., May, F.-R.: At. Data Nucl. Data Tables35, 15 (1986)
Wyss, R., Bengtsson, R., Nazarewicz, W., Nyberg, J.: Private Communication; (and to be published)
Davydov, A.S.: Quantum mechanics. International Series of Monographs in Natural Philosophy, vol. 1, p. 175. Oxford: Pergamon Press 1966
Bengtsson, R., Hamamoto, I., Mottelson, B.: Phys. Lett.73B, 269 (1978)
Frauendorf, S.: Phys. Scripta24, 349 (1981)
Hamamoto, I.: Private communication (1991)
Almberger, J., Hamamoto, L., Leander, G.: Phys. Lett.80B, 153 (1979)
Jönsson, S., Roy, N., Ryde, H., Walus, W., Kownacki, J., Garrett, J.D., Hagemann, G.B., Herskind, B., Bengtsson, R., Aaberg, S.: Nucl. Phys. A449, 537 (1986)
Schück, C., Hannachi, F., Chapman, R., Lisle, J.C., Mo, J.N., Paul, E., Love, D.J.G., Nolan, P.J., Nelson, A.H., Walker, P.M., Ellis-Akovali, Y., Johnson, N.R., Bendjaballah, N., Diamond, R.M., Deleplanque, M.A., Stephens, F.S., Dines, G., Draper, J.: Proc. XIII Int. Winter Meeting on Nucl. Phys., Bormeo, Italy (1985), p. 294. Milano: Ricerca Scientifica ed Educazuione Permanente (1985)
Dracoulis, G.D., Fabricius, B.: Phys. Rev. C41, 2933 (1990)
Ragnarsson, I.: Nucl. Phys. A520, 67c (1990)
Szymanski, Z.: Nucl. Phys. A520, 1c (1990)
Garrett, J.D., Baktash, C., Yu, C.-H.: Proc. Int. Conf. on High Spin Physics and Gamma-Soft Nuclei, Pittsburgh (1990), p. 257, Saladin, J.X., Sorensen, R.A., Vincent, C.M. (eds.). Singapore: World Scientific (1991)
Wyss, R., Johnson, A.: Proc. Int. Conf. on High Spin Physics and Gamma-Soft Nuclei, Pittsburgh (1990), p. 123, Saladin, J.X., Sorensen, R.A., Vincent, C.M. (eds.). Singapore: World Scientific (1991)
Riedinger, L.L. et al.: Contribution to Workshop-Symposium on Future Directions in Nuclear Physics with 4π Gamma Detection Systems of the New Generation, Strasbourg (1991)
Author information
Authors and Affiliations
Additional information
Dedicated to Prof. Dr. P. Kienle on the occasion of his 60th birthday
Stimulating discussions with P.M. Walker, C.-H. Yu and R. Bengtsson are gratefully acknowledged. The authors are indebted to I. Hamamoto for communicating the results of her calculations and for critical comments. This project was supported by the Danish Natural Science Foundation, the NORDBALL collaboration, the Nordic Committee for Accelerator Based Research, the Swedish Natural Science Research Council, the Finish Academy, Commemoration Association for the Japan World Exposition [Quantum Physics Exchange Program between Japan and Denmark (NBI)], the Danish Research Academy, the Humboldt Foundation and Istituto Nazionale di Fisica Nucleare (INFN).
Rights and permissions
About this article
Cite this article
Jensen, H.J., Hagemann, G.B., Tjøm, P.O. et al. Interaction strength and shape difference for the h9/2 and h11/2 configurations in163Tm. Z. Physik A - Hadrons and Nuclei 340, 351–362 (1991). https://doi.org/10.1007/BF01290322
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01290322