B(E2)values and phase coexistence in152Sm

Reexamining the nuclear structure of Gd154 in the dynamic pairing plus quadrupole model

“…This also agrees with the observations on the nature of the K π =0 2 + bands in deformed nuclei reviewed in Ref. [31], but differs from the views based on energy ratio R 4/2 and (t, p) scattering cross section data and IBM-1 predictions in [24,25]. The energy difference E(2 β -0 β ) is almost constant for N=90 isotones, Also it is almost equal to E(2 g ) as apparent in Fig.…”

“…The proposed shape coexistence of the deformed ground band and vibrational β-band in 152 Sm led to increased experimental and theoretical activity. Zamfir et al [24] used the IBM prediction of weak B(E2, 2 γ →0 β ) as an evidence of spherical vibrator shape of the β-band. The same views are adopted in a review of these issues in Ref.…”

“…Jolie et al [27] gave a different view on the shape coexistence proposition. Burke [28] analyzed the reasoning cited in [24], based mainly on the weak γ- [31,9].…”

“…The DPPQ model B(E2) values for γ-g E2 transitions from 2 γ (Table V) [24]. b) Normalized to B(E2, 2 γ →0 g ) in experiment [39].…”

N=90region: The decays ofEu152Kulp1, Wood2, Allmond3 et al. 2007Phys. Rev. C420230View full textAdd to dashboardCite

“…Renewed focus has been brought to this region recently, initiated by studies of very weak γ -decay branches in 152 Sm [1], which has led to the proposition [2,3] that this nucleus has been incorrectly interpreted. The issues are whether this nucleus exhibits coexisting spherical and deformed phases [2,3] and whether it lies almost exactly at the critical point [2] between these phases.…”