Neutron hole states in 138La and 140Pr |
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| Authors: | VD Helton JC Hiebert JB Ball |
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| Institution: | Institute of Physics, College of General Education, University of Tokyo, Tokyo, Japan;Department of Physics, Hosei University, Fujimi, Chiyoda, Tokyo, Japan;Department of Physics, Faculty of Science and Technology, Science University of Tokyo, Noda, Chiba, Japan |
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| Abstract: | Protons accelerated to 30 MeV were used to investigate low-lying states in the odd-odd nuclei 138La and 140Pr with (p, d) reactions. The elastic scattering of 30 MeV protons and 23 MeV deuterons was also studied to determine optical potentials. Experimental angular distributions are compared with distorted-wave Born approximation calculations to extract spin, parity, and spectroscopic factors for levels up to 432 keV of excitation in 140Pr and 530 keV in 138La. Comparisons with the simple shell-model predictions and extended shell-model calculations are presented. The 140Pr levels appear experimentally to have an almost pure particle-hole structure whereas the 138La levels exhibit substantial mixing. |
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| Keywords: | Nuclear reactions |
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