Enhanced cross sections for the transitions to 3+ unnatural-parity states have been observed in the reaction 208Pb(α, 6He)206Pb. These cross sections were well explained by the direct transition of a neutron pair of relative angular momentum l = 1 as a dominant component, suggesting that the reacton (α, 6He) can be a new spectroscopic tool to study l ≠ 0 two-nucleon correlations.
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