Excited states in the two N=76 nuclei 138 Sm and 139 Eu have been identified via 32 S induced reactions on different targets using gamma-ray spectroscopy methods. Lifetimes have been measured with the Doppler shift recoil distance technique, showing the coexistence of a large nuclear deformation (beta=0.24) with excitations of single particle character. The E2 transition strengths in the odd-even nucleus 139Eu and in its core138 Sm are discussed.
Excited states in the neutron deficient nuclei138Sm and139Eu
LUNARDI, SANTO;SCARLASSARA, FERNANDO;SORAMEL, FRANCESCA;MORANDO, MAURIZIO;SIGNORINI, COSIMO;
1985
Abstract
Excited states in the two N=76 nuclei 138 Sm and 139 Eu have been identified via 32 S induced reactions on different targets using gamma-ray spectroscopy methods. Lifetimes have been measured with the Doppler shift recoil distance technique, showing the coexistence of a large nuclear deformation (beta=0.24) with excitations of single particle character. The E2 transition strengths in the odd-even nucleus 139Eu and in its core138 Sm are discussed.
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