Decay out of the superdeformed band in194Pb: Electromagnetic properties

Decay Out of the Doubly Magic Superdeformed Band in theN=ZNucleusZ60Svensson1, Rudolph2, Baktash3 et al. 1999Phys. Rev. Lett.Self Cite972400View full textAdd to dashboardCite

“…The observation of linking transitions in 194 Hg [3] and 194 Pb [4] has led to definite quantum number assignments for SD states in these nuclei. These observations, combined with lifetime measurements for low-spin SD states [5] and decay-out g-ray quasicontinuum studies [6], have also provided a consistent description of the decay out of A ϳ 190 SD bands as a statistical process governed by the weak mixing of SD states with a "sea" of hot ND states separated from the SD levels by a potential energy barrier [7]. In contrast, highly deformed bands in a number of A ϳ 135 Nd isotopes, for which no barrier is predicted at the decay-out point, mix considerably with less deformed structures and decay out while close to the yrast line [8].…”

“…All of these B͑E2͒ values are much larger than the upper limit of ϳ10 24 W.u. (before correcting for the weak SD͞ND mixing amplitudes) set on the decay-out E2 strengths in 194 Pb [5]. Although in a statistical description of the decay-out process the mixing between SD and ND states, and hence the degree to which the decay-out transition strengths are suppressed, depends strongly on the height (and shape) of the potential energy barrier separating the SD and ND wells, we note that the "large" B͑E2͒ of 0.8(2) W.u.…”

Configuration mixing of angular momentum projected self-consistent mean-field states for neutron-deficient Pb isotopes

“…Transitions linking the SD bands to the normal-deformed well are known in 194 Pb [50,51] and, recently, in 192 Pb [52]. [53,54] and obtained 4.7 MeV for 194 Pb.…”

Spreading Width for Decay Out of a Superdeformed Band

“…Recent experimental data given in Refs. [7][8][9][10] have been analyzed using some of these results.…”