Levels in 127La fed by the 127Ce beta-decay

  • H. IimuraEmail author
  • M. Asai
  • S. Ichikawa
  • J. Katakura
  • M. Magara
  • A. Osa
  • M. Oshima
  • N. Shinohara
  • H. Yamamoto


The low-lying levels in 127La have been studied through the β-decay of 127Ce ( T1/2 = 29s) produced by bombarding a natMo target with a 185-MeV 35Cl beam. Reaction products were on-line mass-separated, and γ-ray singles and γ-γ coincidence measurements were performed. Conversion electrons were also measured and multipolarities of transitions have been derived. The half-life of the 210.9-keV level was determined to be (1.9±0.3)ns by the β-γ delayed coincidence technique. The level scheme obtained has been compared with calculations based on the Nilsson model.


23.20.Lv γ transitions and level energies 27.60.+j 90 ⩽ A ⩽ 149 


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  1. 1.
    P.J. Smith, D.J. Unwin, A. Kirwan, D.J.G. Love, A.H. Nelson, P.J. Nolan, D.M. Todd, P.J. Twin, J. Phys. G 11, 1271 (1985).CrossRefGoogle Scholar
  2. 2.
    D. Ward, V.P. Janzen, H.R. Andrews, S.M. Mullins, D.C. Radford, J.C. Waddington, Proceedings of the International Conference on Nuclear Physics in Our Times, Sanibel, 1992 (World Scientific, 1993) p. 218.Google Scholar
  3. 3.
    K. Starosta, Ch. Droste, T. Morek, J. Srebrny, D.B. Fossan, D.R. LaFosse, H. Schnare, I. Thorslund, P. Vaska, M.P. Waring, W. Satuła, S.G. Rohoziński, R. Wyss, I.M. Hibbert, R. Wadsworth, K. Hauschild, C.W. Beausang, S.A. Forbes, P.J. Nolan, E.S. Paul, Phys. Rev. C 53, 137 (1996). CrossRefGoogle Scholar
  4. 4.
    C.M. Parry, R. Wadsworth, A.N. Wilson, A.J. Boston, P.J. Nolan, E.S. Paul, J.A. Sampson, A.T. Semple, C. Foin, J. Genevey, A. Gizon, J. Gizon, I. Ragnarsson, B.G. Dong, Phys. Rev. C 61, 021303 (2000).CrossRefGoogle Scholar
  5. 5.
    D.D. Bogdanov, A.V. Demyanov, V.A. Karnaukhov, M. Nowicki, L.A. Petrov, J. Voboril, A. Plochocki, Nucl. Phys. A 307, 421 (1978).CrossRefGoogle Scholar
  6. 6.
    J. Genevey, A. Gizon, N. Idrissi, B. Weiss, R. Béraud, A. Charvet, R. Duffait, A. Emsallem, M. Meyer, T. Ollivier, N. Redon, Proceedings of the 5th International Conference on Nuclei Far From Stability, Rosseau Lake, 1987, AIP Conf. Proc. 164, 419 (1988).Google Scholar
  7. 7.
    J. Genevey, A. Gizon, D. Barnéoud, Gh. Cata-Danil, R. Béraud, A. Emsallem, C. Foin, C.F. Liang, P. Paris, S. Viteritti, Z. Phys. A 356, 7 (1996).CrossRefGoogle Scholar
  8. 8.
    H. Iimura, S. Ichikawa, M. Oshima, J. Katakura, N. Shinohara, M. Magara, A. Osa, T. Tamura, M. Asai, H. Yamamoto, in Proceedings of the 9th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Budapest, 1996 (Springer, 1997) p. 297.Google Scholar
  9. 9.
    S. Ichikawa, T. Sekine, M. Oshima, H. Iimura, Y. Nakahara, Nucl. Instrum. Methods Phys. Res. B 70, 93 (1992).Google Scholar
  10. 10.
    S. Ichikawa, T. Sekine, H. Iimura, M. Oshima, N. Takahashi, Nucl. Instrum. Methods Phys. Res. A 274, 259 (1989).Google Scholar
  11. 11.
    R.S. Hager, E.C. Seltzer, Nucl. Data A 4, 1 (1968).Google Scholar
  12. 12.
    K. Kitao, M. Oshima, Nucl. Data Sheets 77, 1 (1996).Google Scholar
  13. 13.
    J.R. Leigh, K. Nakai, K.H. Maier, F. Puhlhofer, F.S. Stephens, R.M. Diamond, Nucl. Phys. A 213, 1 (1973).Google Scholar
  14. 14.
    M. Miyaji, master degree thesis, Nagoya University, 1989.Google Scholar
  15. 15.
    I.L. Preiss, P.M. Strudler, R. Wolfgang, Phys. Rev. 129, 1284 (1963).Google Scholar
  16. 16.
    L. Yaffe, J.M. Alexander, E.K. Hyde, Can. J. Chem. 41, 1951 (1963).Google Scholar
  17. 17.
    A. Gizon, Proceedings of XXV Zakopane School on Physics, Zakopane, Poland, 1990, Selected Topics in Nuclear Structure, Vol. 2 (World Scientific, Singapore, 1990) p. 93.Google Scholar
  18. 18.
    B.M. Nyakó, J. Gizon, V. Barci, A. Gizon, S. André, D. Barnéoud, D. Curien, J. Genevey, J.C. Merdinger, Z. Phys. A 334, 513 (1989).Google Scholar
  19. 19.
    J. Gizon, J. Genevey, D. Barnéoud, A. Astier, R. Béraud, Gh. Cata-Danil, A. Emasallem, J. Gizon, Y. Le Coz, C.F. Liang, P. Paris, Z. Phys. A 351, 361 (1995).Google Scholar
  20. 20.
    F. Weller, Fortschr. Phys. 19, 201 (1971).Google Scholar
  21. 21.
    T. Bengtsson, I. Ragnarsson, Nucl. Phys. A 436, 14 (1985).CrossRefGoogle Scholar
  22. 22.
    K. Starosta, Ch. Droste, T. Morek, J. Srebrny, D.B. Fossan, S. Gundel, J.M. Sears, I. Thorslund, P. Vaska, M.P. Waring, S.G. Rohoziński, W. Satuła, U. Garg, S. Nauguleswaran, J.C. Walpe, Phys. Rev. C 55, 2794 (1997).Google Scholar
  23. 23.
    G.A. Leander, P. Möller, Phys. Lett. B 110, 17 (1982).CrossRefGoogle Scholar
  24. 24.
    C. Gustafson, I.L. Lamm, B. Nilsson, S.G. Nilsson, Ark. Fys. 36, 613 (1967).Google Scholar
  25. 25.
    N. Idrissi, A. Gizon, J. Genevey, P. Paris, V. Barci, D. Barnéoud, J. Blachot, D. Bucurescu, R. Duffait, J. Gizon, C.F. Liang, B. Weiss, Z. Phys. A 341, 427 (1992).Google Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2004

Authors and Affiliations

  • H. Iimura
    • 1
    Email author
  • M. Asai
    • 1
  • S. Ichikawa
    • 1
  • J. Katakura
    • 1
  • M. Magara
    • 1
  • A. Osa
    • 1
  • M. Oshima
    • 1
  • N. Shinohara
    • 1
  • H. Yamamoto
    • 2
  1. 1.Japan Atomic Energy Research InstituteTokaiJapan
  2. 2.Department of Nuclear EngineeringNagoya UniversityNagoyaJapan

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