TY - JOUR
T1 - Proton configurations and pairing correlations at the N=80 superdeformed shell closure
T2 - Study of Tb145
AU - Mullins, S. M.
AU - Schmeing, N. C.
AU - Flibotte, S.
AU - Hackman, G.
AU - Rodriguez, J. L.
AU - Waddington, J. C.
AU - Yao, L.
AU - Andrews, H. R.
AU - Galindo-Uribarri, A.
AU - Janzen, V. P.
AU - Radford, D. C.
AU - Ward, D.
AU - Degraaf, J.
AU - Drake, T. E.
AU - Pilotte, S.
AU - Paul, E. S.
PY - 1994
Y1 - 1994
N2 - A superdeformed band has been observed in the N=80 nucleus Tb145 which was produced with the reactions Sn112(37Cl,2p2n) and Sn118(31P,4n) at bombarding energies of 187 and 160 MeV, respectively. Since superdeformed bands also exist in the three lighter N=80 isotones Sm142, Eu143, and Gd144, it is now possible to understand the valence-proton configurations of these bands in a systematic way. The T(2) dynamic moment of inertia in Tb145 shows no evidence for the N = 6 quasiproton crossing that is observed in Gd144. Comparison with cranked Woods-Saxon and total Routhian surface calculations suggests that the proton configuration in Tb145 is 61-[404]9/2+2 in which the quasiproton crossing is blocked. Furthermore, like Eu143 and Sm142, there is no evidence in the T (2) for the N=6 quasineutron crossing predicted by the calculations. This may indicate that static neutron pairing correlations are quenched at the N=80 superdeformed shell closure.
AB - A superdeformed band has been observed in the N=80 nucleus Tb145 which was produced with the reactions Sn112(37Cl,2p2n) and Sn118(31P,4n) at bombarding energies of 187 and 160 MeV, respectively. Since superdeformed bands also exist in the three lighter N=80 isotones Sm142, Eu143, and Gd144, it is now possible to understand the valence-proton configurations of these bands in a systematic way. The T(2) dynamic moment of inertia in Tb145 shows no evidence for the N = 6 quasiproton crossing that is observed in Gd144. Comparison with cranked Woods-Saxon and total Routhian surface calculations suggests that the proton configuration in Tb145 is 61-[404]9/2+2 in which the quasiproton crossing is blocked. Furthermore, like Eu143 and Sm142, there is no evidence in the T (2) for the N=6 quasineutron crossing predicted by the calculations. This may indicate that static neutron pairing correlations are quenched at the N=80 superdeformed shell closure.
UR - http://www.scopus.com/inward/record.url?scp=0000838303&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.50.R2261
DO - 10.1103/PhysRevC.50.R2261
M3 - Article
AN - SCOPUS:0000838303
SN - 0556-2813
VL - 50
SP - R2261-R2265
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 5
ER -