Shape coexistence at high spin in the N = Z+2 nucleus Se-70

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The nucleus Se-70 was studied using the Ca-40(Ca-40, 2alpha2p) reaction at a beam energy of 185 MeV. Gamma rays were measured with the EUROBALL III spectrometer. The known positive-parity bands have been extended and one new band of positive parity and two of negative parity have been identified. These bands are interpreted in terms of the cranked Nilsson-Strutinsky approach. Calculations suggest that the two negative-parity bands, which have the same signature, are both based on a configuration with two protons and three neutrons lifted from the fp shell to the g(9/2) orbital, but at different nuclear shapes. This represents a shape coexistence at high spin.


  • G Rainovski
  • H Schnare
  • R Schwengner
  • C Plettner
  • L Kaubler
  • F Donau
  • J Eberth
  • T Steinhardt
  • O Thelen
  • M Hausmann
  • A Jungclaus
  • KP Lieb
  • A Muller
  • G de Angelis
  • A Gadea
  • DR Napoli
  • A Algora
  • DG Jenkins
  • R Wadsworth
  • A Wilson
  • W Andrejtscheff
  • VI Dimitrov
Enheter & grupper

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik
Sidor (från-till)2617-2625
TidskriftJournal of Physics G: Nuclear and Particle Physics
Utgåva nummer10
StatusPublished - 2002
Peer review utfördJa