Proton configurations and pairing correlations at the [ital N]=80 superdeformed shell closure: Study of [sup 145]Tb

Journal Article · Mon Oct 31 23:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.R2261· OSTI ID:6947512

Mullins, S M; Schmeing, N C; Flibotte, S; Hackman, G; Rodriguez, J L; Waddington, J C; Yao, L ^[1]; Andrews, H R; Galindo-Uribarri, A; Janzen, V P; Radford, D C; Ward, D ^[2]; DeGraaf, J; Drake, T E ^[3]; Pilotte, S ^[4]; Paul, E S ^[5]

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1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)
2. AECL Research, Chalk River Laboratories, Chalk River, Ontario, K0J 1J0 (Canada)
3. Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7 (Canada)
4. Department of Physics, University of Ottawa, Ottawa, Ontario, K1N 6N5 (Canada)
5. Oliver Lodge Laboratory, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX (United Kingdom)

A superdeformed band has been observed in the [ital N]=80 nucleus [sup 145]Tb which was produced with the reactions [sup 112]Sn([sup 37]Cl,2[ital p]2[ital n]) and [sup 118]Sn([sup 31]P,4[ital n]) at bombarding energies of 187 and 160 MeV, respectively. Since superdeformed bands also exist in the three lighter [ital N]=80 isotones [sup 142]Sm, [sup 143]Eu, and [sup 144]Gd, it is now possible to understand the valence-proton configurations of these bands in a systematic way. The T[sup (2)] dynamic moment of inertia in [sup 145]Tb shows no evidence for the [ital N] = 6 quasiproton crossing that is observed in [sup 144]Gd. Comparison with cranked Woods-Saxon and total Routhian surface calculations suggests that the proton configuration in [sup 145]Tb is 6[sup 1][direct product][404][sub 9/2[sup +]][sup 2] in which the quasiproton crossing is blocked. Furthermore, like [sup 143]Eu and [sup 142]Sm, there is no evidence in the T [sup (2)] for the [ital N]=6 quasineutron crossing predicted by the calculations. This may indicate that static neutron pairing correlations are quenched at the [ital N]=80 superdeformed shell closure.

• OSTI ID: 6947512
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663560 -- Nuclear Mass Ranges-- A=90-149-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CHLORINE 37 REACTIONS
COLLECTIVE EXCITATIONS
CORRELATIONS
DEFORMED NUCLEI
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EUROPIUM 143
EUROPIUM ISOTOPES
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
GADOLINIUM 144
GADOLINIUM ISOTOPES
GAMMA SPECTROSCOPY
HADRONS
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PAIRING INTERACTIONS
PHOSPHORUS 31 REACTIONS
POTENTIALS
PROTONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 142
SAMARIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTROSCOPY
SUPERDEFORMED NUCLEI
TARGETS
TERBIUM 145
TERBIUM ISOTOPES
TIN 112 TARGET
TIN 118 TARGET
WOODS-SAXON POTENTIAL