Erlangen 2001 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 17: Kernphysik/Spektroskopie II - Rotationszust
ände
HK 17.7: Talk
Tuesday, March 20, 2001, 15:45–16:00, D
Effects of Quadrupole RPA Correlations in Rotating Nuclei — •Daniel Almehed1, Friedrich Dönau1, and Rashid Nazmitdinov2 — 1FZ Rossendorf, 01314 Dresden — 2JINR, 141980 Dubna, Russia
To study the influence of quadrupole shape vibrations on the rotation we have considered the cranked Hamiltonian implying a residual isoscalar quadrupole-quadrupole interaction. Using the the spectral function integration method [1] the RPA correlation energy E′RPA and its dependence on ω is obtained. The RPA correlations are calculated with normal quadrupole operators or alternatively imposing the constraint of volume conservation when the quadrupole operators have to be taken with doubly stretched coordinates. The different possibilities do only slightly change the results of the mean field calculation but produce rather different effects for the RPA. The correlations are connected with the collective shape vibrations. One notices that the normal QQ-force leads to a much softer potential than the one with doubly stretched QQ-force. [1] F. Dönau et al., Phys. Rev. Lett. 83, 280 (1999)