Abstract
High-spin states in 141Pr have been studied in the reactions 139La(α, 2n)141Pr and 140Ce(d, n)141Pr. Using in-beam spectroscopic methods energies, intensities, excitation functions, γγ coincidences, time and angular distributions and the linear polarization of γ-rays as well as conversion electron spectra were measured. Positive- and negative-parity states of 141Pr have been established for spin values up to J = 272 and Ex < 4750 keV including 19 news lvels. For three levels ns-lifetimes were determined. The experimental data on positive-parity states are in remarkable agreement with shell-model predictions. In the case of positive-parity states no evidence for particle-core coupling is found. The shell-model investigation suggests, however, that the negative-parity states in 141Pr as well as in 143Pm can be explained by particle-core coupling.
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