The observation of 84Mo

Identification ofT=0andT=1Bands in theRudolph1, Gross2, Sheikh3 et al. 1996Phys. Rev. Lett.Self Cite1104450View full textAdd to dashboardCite

“…In recent years, it has become possible to populate and observe even-even N Z nuclei in the A ഠ 70 80 mass region from 64 Ge up to 84 Mo [1,2]. Although such experiments are close to the current limits of sensitivity, the results have revealed dramatic and striking structural features, the majority of which can be attributed to the coincidence of neutron and proton Fermi surfaces.…”

High spin states in the transitional nucleus88Mo

“…These nuclei are difficult to reach via heavy ion fusion evaporation reactions and even their B-decays are often unknown. They lie on the slopes of a region of large prolate quadrupole deformation which centers near 76Sr [1,2] and is correlated with the pronounced singleparticle shell gap at N = Z--38 and deformation parameter B2 = 0.40-0.45 [3,4]. When filling the densely lying single-particle orbits above the gap, the deformation tends to decrease.…”

Identification and structure of high spin particle-hole states in89Mo

“…Note the increase in collectivity for the (3qp) states in 87Mo as compared to the (1 qp) band, that has been established by Winter et al [3]. 4. A surprising result is that the high-spin states in nuclei with a number of proton particles and neutron holes in the same orbits can be easily accommodated within a very simple shell model scheme.…”

“…This was also predicted by potential energy surface calculations by M611er and Nix [6] and HartreeFock cranking calculations with a Woods-Saxon single particle potential [5]. From the energy of the first 2 + state, a quadrupole deformation of ]/~21 ,,~0.28 has been suggested for the N= Z isotope 84Mo [4], which is considerably smaller than the large deformations I/~2[ ~,~,0.40 estimated in 768r and 8~…”

“…24 h in 88Mo [ 1 ]. A transition to a more collective behaviour was found [4] and Gross et al [5], the structure of their ground bands appears to be rotational-like. This was also predicted by potential energy surface calculations by M611er and Nix [6] and HartreeFock cranking calculations with a Woods-Saxon single particle potential [5].…”