Springer Online Journal Archives 1860-2000
Abstract The levels of151Eu have been investigated in the (n,n′γ) reaction using nuclear reactor fast neutrons. The energies, intensities and angular distributions of theγ-rays have been measured with the Ge(Li) spectrometer. Four rotational bands with the following band heads and Nilsson configurations have been identified: ground state band, 5/2+ ; 21.5 keV, 7/2+; 196.5 keV, 3/2+; 260.5 keV, 5/2+. The low spin states at 332.2 and 336.2 keV have been tentatively assigned to the l/2+ Nilsson orbital, but 522.8, 580.0 and 587.0 keV states to the 1/2+ Nilsson orbital. The negative parity levels at 353.7, 522.1 and probably 546.2 keV have been proposed basing on theh 11/2 proton state.
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