NUCL 40 |
| In this presentation I will discuss two topics joined under the common theme of pairing in the nucleus. First, I will present a new description of the transition from a "normal" to a "superconducting" nucleus. Analytical solutions of the collective pairing Hamiltonian were found by using simple approximations to the potential in various limits. The approximate collective solutions are compared to the exact solutions of a two level model and good agreement is found. Comparison to experimental data on the Pb isotopes suggest that 208Pb is close to the critical-point of the pairing transition. Second, I will describe recent experiments using (3He,p) np-pair transfer reactions on N=Z nuclei to search for evidence of T=1 and T=0 collective np pairing. In particular, a radioactive beam of 44Ti was used to measure the relative transfer cross section to the lowest lying T=0 and T=1 states in 46V. There is no evidence of appreciable T=0 np-pair collectivity in this system. |
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Nuclear Structure and Reactions in the Era of Radioactive Beams
8:10 AM-12:00 PM, Monday, August 20, 2007 Boston Park Plaza -- Lexington Room, Oral
Division of Nuclear Chemistry & Technology |