Abstract
The Spin Spectrometer was used to separate Dy ground-band and two-quasiparticle populations in one- and two-neutron transfer reactions with Sn and Ni projectiles. Transfer probabilities {ital P}{sub 1{ital n},2{ital n}} and two-neutron enhancement factors {ital F}=={ital P}{sub 2{ital n}}/{ital P}{sub 1{ital n}}{sup 2} were determined as a function of scattering angle. For the two-quasiparticle bands {ital F}{congruent}7--20, but for the ground band {ital F}{congruent}30--500, indicating large pairing effects in two-particle transfer to the ground band. The data also indicate larger enhancement factors in Sn than in Ni collisions.
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