Contrasting behavior in the rotational structure of the Tz=1/2 nuclei Kr73 and Rb75: A possible fingerprint of T=0 neutron-proton pairing correlations

TY - JOUR

T1 - Contrasting behavior in the rotational structure of the Tz=1/2 nuclei Kr73 and Rb75

T2 - A possible fingerprint of T=0 neutron-proton pairing correlations

AU - Wyss, R.A.

AU - Satuła, W.

AU - Davies, P.J.

AU - Wadsworth, R.

PY - 2007/7/2

Y1 - 2007/7/2

N2 - Three different rotational bands have been observed to high spin in Rb75 using Gammasphere. The structures are similar, but not identical to those found in the neighboring Tz=1/2 nucleus Kr73. Conventional total Routhian surface (TRS) calculations with T=1 pairing are able to reproduce the rotational bands in Rb75 with extreme accuracy, but they completely fail in reproducing the spectra and decay pattern of the negative parity bands in Kr73. Simple qualitative arguments are put forward to show that the decay pattern observed in the negative parity bands in Kr73 can be accounted for by means of T=0 pair correlations. To further corroborate this scenario, deformation, and pairing self-consistent TRS calculations, including schematic T=1 and T=0 pairing, are performed for the first time indicating the onset of dynamical T=0 pair-correlations at high angular momenta. © 2007 The American Physical Society.

AB - Three different rotational bands have been observed to high spin in Rb75 using Gammasphere. The structures are similar, but not identical to those found in the neighboring Tz=1/2 nucleus Kr73. Conventional total Routhian surface (TRS) calculations with T=1 pairing are able to reproduce the rotational bands in Rb75 with extreme accuracy, but they completely fail in reproducing the spectra and decay pattern of the negative parity bands in Kr73. Simple qualitative arguments are put forward to show that the decay pattern observed in the negative parity bands in Kr73 can be accounted for by means of T=0 pair correlations. To further corroborate this scenario, deformation, and pairing self-consistent TRS calculations, including schematic T=1 and T=0 pairing, are performed for the first time indicating the onset of dynamical T=0 pair-correlations at high angular momenta. © 2007 The American Physical Society.

KW - SYMMETRY ENERGY

KW - WIGNER ENERGY

KW - RICH NUCLEI

KW - BANDS

KW - ISOSPACE

UR - http://www.scopus.com/inward/record.url?scp=34547337562&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.76.011301

DO - 10.1103/PhysRevC.76.011301

M3 - Article

SN - 2469-9985

VL - 76

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 011301

ER -