Neutron hole states in 91Mo and 93Mo studied by the (p, d) reaction

M. A. Moinester*, G. Finkel, J. Alster, P. Martin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The level structure of 91Mo and 93Mo has been investigated with the 92, 94Mo(p, d) 91, 93Mo reactions at Ep = 40 MeV. Deuteron angular distributions were measured for 26 groups in 91Mo up to 9 MeV excitation (including five analog states), and 24 groups in 93Mo up to 13 MeV excitation (including five analog states). The ln values and transition strengths were determined from a DWBA analysis. Several new spin and parity assignments were made. The results are compared to the 92, 94Mo(d, t), 90, 92Zr(p, d), 88Sr(d, t) and 92, 94Mo(d, 3He) reactions. All results are compared to simple sum-rule predictions. The summed transition strengths in 91, 93Mo agree reasonably well with sum-rule predictions except for the 1f 5 2 transitions. The 1f 5 2 strength, and to a lesser degree the 1g 9 2 and 2p strengths, are severely fragmented in 93Mo in contrast to 87Sr, 89Zr and 91Mo. We show that the N = 50 core in the 92Mo ground state is very well closed. In the 94Mo ground state, the neutrons beyond the N = 50 core occupy only about 65% of the 2d 5 2 orbit. For the analog states in 91,93Mo, neither the effective binding nor the separation energy form factor gives consistently better results as regards both the C2S values and the quality of the DWBA fits. The Q-value of the 92Mo(p, d)91Mo reaction was found to be Q = -10.432 ± 0.025 MeV.

Original languageEnglish
Pages (from-to)473-496
Number of pages24
JournalNuclear Physics A
Issue number3
StatePublished - 5 Mar 1973


  • Nuclear Reactions


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