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arxiv: nucl-th/9907121 · v1 · pith:LONTMDWTnew · submitted 1999-07-30 · ⚛️ nucl-th · nucl-ex

Is there np pairing in odd-odd N=Z nuclei?

classification ⚛️ nucl-th nucl-ex
keywords nucleiodd-oddeven-evenpairingboundevidencegroundstate
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The binding energies of even-even and odd-odd N=Z nuclei are compared. After correcting for the symmetry energy we find that the lowest T=1 state in odd-odd N=Z nuclei is as bound as the ground state in the neighboring even-even nucleus, thus providing evidence for isovector np pairing. However, T=0 states in odd-odd N=Z nuclei are several MeV less bound than the even-even ground states. We associate this difference with a pair gap and conclude that there is no evidence for an isoscalar pairing condensate in N=Z nuclei.

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