Abstract
Life-times of low-lying levels in 9137 Rb54 and 9337 Rb56 have been determined fromβ −−γ coincidence measurements at the fission-product separator JOSEF. Values oft 1/2=17.0(8) ns and 2.0(2) ns have been obtained for the levels at 1,134 keV in91Rb and 267 keV in93Rb, respectively, and upper limits could be deduced for several other states. Calculations in the frame of IBFM/PTQM have been performed for91Rb, the results of which allow an interpretation of the low-lying levels of this nucleus. For the 1,134 keV level the configuration [πg 9/2⊗2+] 7/2+ is suggested which lies close to or even below the 9/2 +1 level. The calculated half-life of 14 ns for the 1,134 keV level reproduces well the experimental value. The half-life of the 267 keV level in93Rb favours the assignment ofI π=1/2− to this state over the alternative 3/2−.
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References
Ekström, C., Robertsson, L., Wannberg, G., Heinemeier, J.: Phys. Scr.19, 516 (1979)
Klempt, W., Bonn, J., Neugart, R.: Phys. Lett.82B, 47 (1979)
Thibault, C., Touchard, F., Büttgenbach, S., Klapisch, R., Saint Simon, M. de, Duong, H.T., Jacquinot, P., Juncar, P., Liberman, S., Pillet, P., Pinard, J., Vialle, J.L., Pesnelle, A., Huber, G.: Phys. Rev. C23, 2720 (1981)
Lederer, C.M., Shirley, V.: Table of isotopes. 7th Edn. New York: J. Wiley Inc. 1978
Glascock, M.D., Talbert, Jr., W.L., Duke, C.L.: Phys. Rev.C13, 1630 (1976)
Bischof, C.J., Talbert Jr., W.L.: Phys. Rev.C15, 1047 (1977)
Lawin, H., Eidens, J., Borgs, J.W., Fabbri, R., Grüter, J.W., Joswig, G., Khan, T.A., Lauppe, W.D., Sadler, G., Selič, H.A., Shaanan, M., Sistemich, K., Armbruster, P.: Nucl. Instrum. Methods 137, 103 (1976)
Kawade, K., Battistuzzi, G., Lawin, H., Selič, H.A., Sistemich, K., Schussler, F., Monnand, E., Pinston, J.A., Pfeiffer, B., Jung, G.: Z. Phys. A — Atoms and Nuclei304, 293 (1982)
Battistuzzi, G., Kawade, K., Lawin, H., Shizuma, K., Sistemich, K.: Z. Phys. A — Atoms and Nuclei306, 113 (1982)
Arima, A., Iachello, F.: Ann. Phys.99, 253 (1976)
Janssen, D., Jolos, R.V., Dönau, F.: Nucl. Phys. A224, 93 (1974)
Iachello, F., Scholten, O.: Phys. Rev. Lett.43, 679 (1979)
Paar, V., Brant, S., Canto, L.F., Leander, G., Vouk, M.: Nucl. Phys. A378, 41 (1982); Paar, V.: Verh. Dtsch. Phys. Ges.3, 683 (1979)
Tokunaga, Y., Seyfarth, H., Schult, O.W.B., Brant, S., Paar, V., Vretenar, D., Börner, H.G., Barreau, G., Faust, H., Hofmeyr, Ch., Schreckenbach, K., Meyer, R.A.: Nucl. Phys.A430, 269 (1984)
Kisslinger, L.S., Sørensen, R.A.: Rev. Mod. Phys.35, 853 (1963)
Meyer, R.A., et al.: (to be published)
Paar, V., Brant, S.: Phys. Lett.74B, 297 (1978)
Rösel, F., Fries, H.M., Alder, K., Pauli, H.C.: At. Data Nucl. Data Tables21, 91 (1978)
Lhersonneau, G., Dumont, G., Cornelis, K., Huyse, M., Verplancke, J.: Phys. Rev.C18, 2688 (1978)
Paar, V.: Nucl. Phys.A211, 29 (1973)
Sund, R.E., Weber, H., Verbinski, V.V.: Phys. Rev.C10, 853 (1974)
Kohl, P.: Thesis Universität Bonn, Institut für Strahlen- und Kernphysik, 1986
Madland, D.G., England, T.R.: Nucl. Sci. Engineering64, 859 (1977)
McDonald, J., Fogelberg, B., Bäcklin, A.: Research Report NFL-8, 1 (1979)
Achternberg, E., Iglesias, F.C., Jech, A.E., Moragues, J.A., Otero, D., Perez, M.L., Proto, A.N., Rossi, J.J., Scheuer, W.: Phys. Rev.C10, 2526 (1974)
Federman, P., Pittel, S.: Phys. Rev.C20, 820 (1979)
Kratz, K.L., Insitut für Kernchemie, Universität Mainz. Private communication
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During the measurements on leave from Nagoya University, Japan
Assisted by Internationales Büro, Kernforschungsanlage Jülich, FRG
The authors acknowledge with pleasure the assistance of Padre Dr. G. Battistuzzi in performing the measurements. They appreciate the support by Messrs. W. Borgs, A. Jeglorz and R. Seidemann in the course of the experiments at JOSEF and by Mrs. H. Paffen who carefully wrote the manuscript. The non-KFA authors wish to thank Prof. O. Schult for his hospitality.