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artículo con referato
"Temperature antipairing effect over the Energy Weighted Sum Rule"
E.C. Seva, A. Tonina and H.M. Sofia
Nucl. Phys. A 686(1-4) (2001) 241-257
We study the temperature dependence of the sum rules using the discontinuity of the first derivative of the Matsubara Green's functions of a bilinear particle-hole operator. Particularly we study the behavior of the dipole particle-hole operator. We applied the calculation to 114Sn, 138Ba, 154Gd and 170Yb. It is found that the energy weighted sum rule for the dipole operator changes as a function of the temperature depending on the square of the gap. This fact is related to the antipairing effect of the temperature over the nuclear system.
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