Original scientific paper

Saturation of deformation at N = 60 in the Sr isotopes

Gerard Lhersonneau ; Institut für Kernchemie, Universität Mainz, D-6500 Mainz, F. R. G.
Heinrich Gabelmann ; Institut für Kernchemie, Universität Mainz, D-6500 Mainz, F. R. G. and CERN, CH-1211, Geneva, Switzerland
Kris Heyde ; Laboratorium voor Kernfysica, Rijksuniversiteit Gent, B-9000 Gent, Belgium
Norbert Kaffrell ; Institut für Kernchemie, Universität Mainz, D-6500 Mainz, F. R. G.
Karl-Ludwig Kratz ; Institut für Kernchemie, Universität Mainz, D-6500 Mainz, F. R. G.
Bernd Pfeiffer ; Institut für Kernchemie, Universität Mainz, D-6500 Mainz, F. R. G.
Isolde Collaboration ; CERN, CH-1211, Geneva, Switzerland

Abstract

From the lifetime of t1/2 = 3.91 (16) ns for the 2+ state in 100Sr a deformation parameter of β = 0.40 (1) has been derived. Within the given uncertainties, this value is equal to the recently determined β-parameters for 98Sr and 99Sr, indicating that in the Sr isotopes saturation of deformation is reached immediately at its onset well before neutron midshell. This behaviour is reflected by the „twin“ character of 98Sr and 100Sr with identical features of their unperturbed groundstate rotational bands. These observations are discussed in terms of strong twonucleon interactions.

Keywords

Hrčak ID:

332670

URI

https://hrcak.srce.hr/332670

Publication date:

5.2.1990.

Article data in other languages: croatian

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