Local suppression of collectivity in the N = 80 isotones at the Z = 58 subshell closure

C. Bauer, G. Rainovski, N. Pietralla, D. Bianco, A. Blazhev, T. Bloch, S. Boenig, A. Damyanova, M. Danchev, K. A. Gladnishki, T. Kroell, J. Leske, N. Lo Iudice, T. Moeller, K. Moschner, J. Pakarinen, P. Reiter, M. Scheck, M. Seidlitz, B. SiebeckC. Stahl, R. Stegmann, T. Stora, Ch. Stoyanov, D. Tarpanov, M. J. Vermeulen, D. Voulot, N. Warr, F. Wenander, V. Werner, H. De Witte

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Background: Recent data on N = 80 isotones have suggested that the proton
π(1g7/2) subshell closure at Z = 58 has an impact on the properties of low-lying collective states.

Purpose: Knowledge of the B(E2;2+1→0+1) value of 140Nd is needed in order to test this conjecture.

Method: The unstable, neutron-rich nucleus 140Nd was investigated via projectile Coulomb excitation at the REX-ISOLDE facility with the MINIBALL spectrometer.

Results: The B(E2) value of 33(2) W.u. expands the N = 80 systematics beyond the Z = 58 subshell closure.

Conclusions: The measurement demonstrates that the reduced collectivity of
138Ce is a local effect possibly due to the Z = 58 subshell closure and requests refined theoretical calculations. The latter predict a smoothly increasing trend.
Original languageEnglish
Article number021302(R)
JournalPhysical Review C
Issue number2
Publication statusPublished - 16 Aug 2013
Externally publishedYes


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