Recent work suggests that the quadrupole pair field may be important in describing certain properties of the crossings of high-spin rotational bands (e.g. crossing frequencies) in quantitative detail. We investigate its relative importance by performing an exact diagonalisation of a cranked deformed hamiltonian containing short-range residual interactions in a single j-shell. The major diflerence between odd and even particle-number crossing frequencies is seen to be described by blocking plus quadrupole pairing (J = 2) along with a significant hexadecapole pairing effect (J = 4). Absolute crossing frequencies are also sensitive to higher J-values. The interactions between the crossing levels are also discussed.
ASJC Scopus subject areas
- Nuclear and High Energy Physics