Quadrupole moments of high-spin isomers: Test of the tilted-axis cranking model

Balabanski, DL; Vyvey, Katrien; Neyens, Gerda; Almehed, D; Blaha, P; Borremans, Dana; Chmel, S; Coulier, Nico; Coussement, Romain; De Clercq, W; Frauendorf, S; Georgiev, Georgi; Hubel, H; Lepine-Szily, A; Mineva, M; Nenoff, N; Pancholi, S; Rossbach, D; Schwengner, R; Teughels, Stéphanie; Walker, PM

Quadrupole moments of high-spin isomers: Test of the tilted-axis cranking model

Author:

Balabanski, DL

Vyvey, Katrien ; Neyens, Gerda ; Almehed, D ; Blaha, P ; Borremans, Dana ; Chmel, S ; Coulier, Nico ; Coussement, Romain ; De Clercq, W ; Frauendorf, S ; Georgiev, Georgi ; Hubel, H ; Lepine-Szily, A ; Mineva, M ; Nenoff, N ; Pancholi, S ; Rossbach, D ; Schwengner, R ; Teughels, Stéphanie ; Walker, PM

Keywords:

rotation, nuclei, bands, Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, ROTATION, NUCLEI, BANDS, nucl-ex, 01 Mathematical Sciences, 02 Physical Sciences, Nuclear & Particles Physics, 49 Mathematical sciences, 51 Physical sciences

Abstract:

We report the results of recent measurements of the spectroscopic quadrupole moments of high-spin isomers. For the K-pi = 35/2(-) five-quasiparticle isomer in W-179 we measured Q(B) = 4.00 ((+0.83)(-1.06)) eb. It corresponds to a smaller deformation compaxed to the ground states of the W isotopes and is in disagreement with the current theoretical predictions. We also measured the quadrupole moment of the I-pi = 11(-) isomer in Pb-196, Q(s) = (-)3.41(66) eb. It has the same proton (s(1/2)(-2)h(9)/(2)i(13/2)) configuration as the one suggested for the 11 = 16(-) magnetic bandhead which allows to deduce the quadrupole moment of the 16(-) state as Q(s) = -0.316(97) eb. This small value proves the near sphericity of the bandhead.