The effect of deformed states in the Ca isotopes

Beyond-mean-field-model analysis of low-spin normal-deformed and superdeformed collective states ofS32,ArBender1, Flocard2, Heenen3 2003Phys. Rev. C93121412View full textAdd to dashboardCite

“…In addition, at the extreme left side of the picture, we have plotted two other states observed within the same range of spins and excitation energies (2 + at 5.249 MeV and 4 + at 6.509 MeV). However, we feel entitled to eliminate them from our discussion of the GCM results because, according to some theoretical models [20], they correspond to a K = 2 band which, cannot be described within the present purely axial model. The upper part of Table I collects data for the states of the ND band (labelled "band 2" in [2]).…”

Erratum: Coexistence of spherical states with deformed and superdeformed bands in doubly magicCa40: A shell-model challenge [Phys. Rev. C75, 054317 (2007)]

“…Other cases have been known for a long time, for instance, the four particle four holes and eight particle eight holes states in 16 O, starting at 6.05 MeV and 16.75 MeV of excitation energy [1,2]. The theoretical descriptions based in multiple particle hole excitations that can accommodate deformation started with the work of Brown and Green [3], Gerace and Green [4,5] and Zuker, Buck and McGrory [6] In 40 Ca, there has been since long experimental indications showing that the two low-lying sequences, 0 + , 2 + , 4 + , starting at 3.35 MeV and 5.21 MeV, may correspond to deformed or superdeformed bands (see ref. [7]).…”

“…One characteristic feature of these bands is that they may belong to rather well defined shell model configurations; for instance, the deformed excited band in 56 Ni can be associated with the configuration (0f 7/2 ) 12 (1p 3/2 , 0f 5/2 , 1p 1/2 ) 4 while the super-deformed band in 36 Ar is based in the structure (sd) 16 (pf ) 4 . The location of the np-nh states in 40 Ca was studied in the Hartree-Fock approximation with blocked particles and Skyrme forces in ref.…”

Proton ground-state correlations in 40Ca studied with the reaction 40Ca(e, e′ p)49K

“…ground-state correlations. For "Ca Gerace and Green [4,5] already showed that the inclusion of n-particle-n-hole configurations in the ground state improved the calculated electromagnetic transition probabilities in the light Ca isotopes. The most direct experimental evidence for correlations in the ground .…”