Low-spin excitations in 146Sm View Full Text


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Article Info

DATE

2012-01-20

AUTHORS

C. Küppersbusch, S. Pascu, P. von Brentano, D. Bucurescu, Gh. Căta-Danil, D. Deleanu, J. Endres, M. Elvers, D. Filipescu, C. Frießner, D. G. Ghiţă, T. Glodariu, C. Mihai, N. M. Mărginean, R. Mărginean, A. Negreţ, T. Sava, L. Stroe, V. Werner, N. V. Zamfir, K. -O. Zell, A. Zilges

ABSTRACT

The low-spin excitations of the nucleus 146Sm which is just two neutrons and two protons away from the N = 82 shell and Z = 64 subshell closures have been investigated by means of the 143Nd (α, n) and 144Nd (α, 2n) fusion-evaporation reactions. We established 47 hitherto unknown energy levels up to 4.7MeV and 75 new transitions. In addition, 7 spin assignments were possible from the γ-γ angular correlation analysis. The structure of the possible candidates for a 2+ ⊗ 3− quadrupole-octupole multiplet are first discussed in terms of the harmonic vibrational model. A comparison of these states with the corresponding ones in the neighboring N = 84 isotones is also presented. Finally, the structure of the 146Sm nucleus is interpreted in terms of the IBA-spdf model. It is shown that the model is able to reproduce the experimental relative transition strengths of the 2+ ⊗ 3− quadrupole-octupole multiplet and also a series of collective properties such as the proposed double-octupole excitations. More... »

PAGES

1

References to SciGraph publications

  • 1998-06. Octupole excitations in146Sm in IL NUOVO CIMENTO A (1971-1996)
  • 1992-12. Structure of the146Sm states from the146Eu decay in ZEITSCHRIFT FÜR PHYSIK A HADRONS AND NUCLEI
  • 1990-12. Shell model and octupole states in148Gd from in-beam experiments in ZEITSCHRIFT FÜR PHYSIK A HADRONS AND NUCLEI
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    http://scigraph.springernature.com/pub.10.1140/epja/i2012-12001-2

    DOI

    http://dx.doi.org/10.1140/epja/i2012-12001-2

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    https://app.dimensions.ai/details/publication/pub.1006817844


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    9 schema:description The low-spin excitations of the nucleus 146Sm which is just two neutrons and two protons away from the N = 82 shell and Z = 64 subshell closures have been investigated by means of the 143Nd (α, n) and 144Nd (α, 2n) fusion-evaporation reactions. We established 47 hitherto unknown energy levels up to 4.7MeV and 75 new transitions. In addition, 7 spin assignments were possible from the γ-γ angular correlation analysis. The structure of the possible candidates for a 2+ ⊗ 3− quadrupole-octupole multiplet are first discussed in terms of the harmonic vibrational model. A comparison of these states with the corresponding ones in the neighboring N = 84 isotones is also presented. Finally, the structure of the 146Sm nucleus is interpreted in terms of the IBA-spdf model. It is shown that the model is able to reproduce the experimental relative transition strengths of the 2+ ⊗ 3− quadrupole-octupole multiplet and also a series of collective properties such as the proposed double-octupole excitations.
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