Nuclear Spectroscopy of <sup>44,46</sup>Ca with Fusion Reactions Induced by Reaccelerated Rare-isotope Beams
ORAL
Abstract
Fusion reactions provide powerful tools to study medium- and high- spin states in a variety of nuclei. With the advent of reaccelerator facilities, rare-isotope beams could provide sufficient intensity to take advantage of this reaction mechanism. Detailed investigation is necessary to evaluate the experimental feasibility of this novel approach; therefore, two studies using beams of stable 40Ar and neutron-rich 45K on a lithium target were performed to access nuclei in the region of 40-48Ca using the ReA3 complex at NSCL. One particular nucleus of interest in the present measurement is 46Ca, where high spin states (J > 6) require neutron particle-hole excitations across the N=28 shell gap. Little is known of such band structures in heavier calcium isotopes, whereas deformed bands associated with intruder configurations have been found on excited 0+ states in 40,42Ca. Using particle and gamma coincidence techniques, reaction channels can be selected to search for unknown transitions. New results are presented and discussed in terms of the shell structure and collective properties in this region.
*This work was supported by the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003180.
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Presenters
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John Ash
- National Superconducting Cyclotron Laboratory, Michigan State University