Proton emission from an oblate nucleus 151Lu

Excited states in the proton-unbound nuclideTa158

“…The transition marked with an asterisk (*) is an unresolved multiplet. (2) 149 ( (7) 58 (7) 782.2(10) 50(7) 439.2 (8) 42 (6) 1001.6(11) 984(51) E3 980(51) 583.9 (8) 75 (7) M1 77 (7) to specific configurations, given the uncertainties about their spin values we prefer not to speculate about their interpretation.…”

“…Current experimental techniques offer possibilities to investigate excited states in nuclei beyond the proton drip line, probing discrete states that are highly unbound to proton emission. Despite the low production cross sections for such neutron-deficient nuclei, extensive level schemes have been produced for proton-unbound nuclides, including many proton emitters [1][2][3][4][5][6][7][8][9][10][11][12][13]. In some cases the level schemes extend to excitation energies of several MeV.…”

Reinvestigation of the excited states in the proton emitter Lu151 : Particle-hole excitations across the N=Z=64 subshell

“…The excited states of 151 Lu were studied in different laboratories using the very selective recoil decay tagging (RDT) technique [7][8][9][10]. The level scheme of 151 Lu was much extended in the recent experiment at JYFL [7,10].…”

“…The level scheme of 151 Lu was much extended in the recent experiment at JYFL [7,10]. The lifetimes of a few excited states including 15/2 − , the first excited state feeding the proton-emitting g.s., were measured using the recoil-distance Doppler-shift method [7,10]. The comparison between the measured lifetimes and theoretical calculations using the non-adiabatic strong-coupling model suggested a mild oblate deformation for the g.s.…”

“…The comparison between the measured lifetimes and theoretical calculations using the non-adiabatic strong-coupling model suggested a mild oblate deformation for the g.s. of 151 Lu [10]. A tentative level scheme built on the proton decaying d 3/2 isomer was proposed in Ref.…”