Competition between isoscalar and isovector pairing correlations in N=Z nuclei
Abstract
We study the isoscalar (T=0) and isovector (T=1) pairing correlations in N=Z nuclei. They are estimated from the double difference of binding energies for odd-odd N=Z nuclei and the odd-even mass difference for the neighboring odd-mass nuclei, respectively. The empirical and BCS calculations based on a T=0 and T=1 pairing model reproduce well the almost degeneracy of the lowest T=0 and T=1 states over a wide range of even-even and odd-odd N=Z nuclei. It is shown that this degeneracy is attributed to competition between the isoscalar and isovector pairing correlations in N=Z nuclei. The calculations give an interesting prediction that the odd-odd N=Z nucleus 82Nb has possibly the ground state with T=0.
Keywords
Cite
@article{arxiv.nucl-th/0404003,
title = {Competition between isoscalar and isovector pairing correlations in N=Z nuclei},
author = {Kazunari Kaneko and Munetake Hasegawa},
journal= {arXiv preprint arXiv:nucl-th/0404003},
year = {2009}
}
Comments
5 pages, 4 figures, to be published in Phys. Rev. C (R)