A fusion-evaporation reaction between a thick self-supporting 110Pd target and a 'Li beam has been used to populate and study indium and cadmium nuclei with A=112-114 using the YRAST Ball -y-ray spectrometer array. Previously unreported states in 112In and 114In have been observed by use of -y--y and 'y3 coincidences, and tentative spin and parity assignments using -y-ray angular correlation and distribution analysis have identified several bands consisting of stretched dipole transitions. Experimental B(M1)/B(E2) values extracted from these dipole bands are consistent with values indicative of a shears mechanism. The experimental B(M1)/B(E2) values have been compared with theoretical values calculated using the semi-classical Dönau formalism and are consistent with a single 99/2 proton coupled to various rotationally aligned neutron configurations. Calculations of Z(2)/B(E2) result in values in excess of those usually obtained from rotational bands based on collective rotation and further add to the evidence of angular momentum generation by the shears mechanism. Two previously unreported states in 112C d have been observed which allow the observation of the vibrational to rotational evolution by use of E-GOS curves. The commissioning of SASSYER, a recoil separator situated at the Wright Nuclear Structure Laboratory, Yale University, is documented in Appendix A. The use of an array of solar cells as a recoil detector is reported and the initial performance of SASSYER is investigated.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:402905 |
| Date | January 2004 |
| Creators | Langdown, S. D. |
| Publisher | University of Surrey |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://epubs.surrey.ac.uk/2729/ |
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