Abstract
Over 300 transitions up to 4.5 MeV in excitation energy were observed in the () and () reactions on , , , and and in the () reaction on , , and at a bombarding energy of 17 MeV. All targets were isotopically enriched and out-going particles were detected in a split-pole spectrograph having 8- to 14-keV (full width at half maximum) resolution. Over 100 angular distributions in the () and () reactions were measured and compared with distorted-wave Born-approximation calculations to assign values and extract spectroscopic factors. Two new very low-lying levels were identified - a at ∼0.005 MeV in and a at ∼0.028 MeV in . The () reaction only excited shell-model neutron-hole levels, while the () reaction excited shell-model neutron-particle levels above the gap with greatest intensity in the heavier mercury isotopes. In the lighter mercury isotopes, the () reaction increasingly excited the neutron-hole states until in the neutron-hole states are excited with greatest intensity. Fragmentation of all the single-particle and single-hole levels is seen and tends to increase in the lighter mercury isotopes.
- Received 31 January 1972
DOI:https://doi.org/10.1103/PhysRevC.5.1678
©1972 American Physical Society