Low-lying states in<sup>138,</sup><sup>140</sup>Gd and<sup>139</sup>Eu
P J BishopOliver Lodge Lab., Liverpool Univ., UKM. J. GodfreyOliver Lodge Lab., Liverpool Univ., UKA KirwanOliver Lodge Lab., Liverpool Univ., UKP. J. NolanOliver Lodge Lab., Liverpool Univ., UKD J ThornleyOliver Lodge Lab., Liverpool Univ., UKJ M O'DonnelOliver Lodge Lab., Liverpool Univ., UKR. WadsworthOliver Lodge Lab., Liverpool Univ., UKD J G LoveOliver Lodge Lab., Liverpool Univ., UKL. GoettigOliver Lodge Lab., Liverpool Univ., UK
1988en
ABI
Abstract
Low-lying states have been investigated in the neutron-deficient nuclei 138, 140Gd and 139Eu. The states were populated using the 92Mo+50Cr and 92Mo+54Fe reactions. New energy levels are reported in each nucleus and mean lifetimes have been measured in 138Gd and 139Eu. The deformations deduced from the experiments confirm the predicted trend to higher deformation for the more neutron-deficient nuclei. The N=76 isotope (139Eu and 140Gd) show evidence for band crossing involving h11/2 neutrons and protons.
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Cited by 30 references