Yrast excitations in the neutron-richN=52isotones

β-decay properties of the very neutron-rich isotopesGe86andAsMazzocchi1, Rykaczewski2, Grzywacz3 et al. 2015Phys. Rev. C8150View full textAdd to dashboardCite

“…Its energy is slightly underestimated both in the present calculations and in those shown in Figure 19 of Ref. [21], pointing towards a problem with the interactions used so far away from the N=50 and Z=28 shell closure.…”

“…; • the observation of this transition in the βnγ decay of 87 As [10]; • the fact that the level was not observed in the prompt-γ fission data [21], where high-spin states yrast are expected to be populated. …”

“…The spin and parity of the 704.1, 1567.4 and 2071.5 excited states was determined before by Kratz et al [19], Jones et al [20] and Czerwiński et al [21], respectively. Tentative I π =(2 + ) could be inferred for the 1398.6 keV level by taking into account:…”

Relativistic Coulomb excitation of Kr88

“…Such an approach based on a 78 Ni core and an extended model space (1f 5/2 ,2p 1/2 ,2p 3/2 ,1g 9/2 ) for protons and (2d 5/2 ,3s 1/2 ,2d 3/2 ,1g 7/2 ,1h 11/2 ) for neutrons was presented in Ref. [30] and reproduced spectroscopic data of mixed-symmetry states in zirconium isotopes as well as yrast excitations in 88 Kr [31]. With the same effective interaction but slightly changed effective charges of e n = 0.7 eb, e p = 1.7 eb, orbital g factors g [30].…”

βandβ−ndecay of the neutron-richGe84nucleus

“…Extensive investigations of neutron-rich nuclei across the energy gaps at N=50 and Z=28 have been carried out in recent years, see e.g., [1][2][3][4][5][6][7][8][9][10][11][12][13] and demonstrate significant progress in experimental and theoretical capabilities. In particular, the investigation of nuclei with just one valence neutron outside the N=50 shell helps to define the sequence of single-neutron states [14,15].…”