Possible chirality in the doubly-odd {sup 198}Tl nucleus: Residual interaction at play

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.021305· OSTI ID:21192089

Lawrie, E A; Lawrie, J J; Bark, R A; Mullins, S M; Murray, S H. T. ^[1]; Vymers, P A; Maliage, S M; Masiteng, P L; Ramashidzha, T M; Sharpey-Schafer, J F; Shirinda, O ^[1]; Vieu, Ch; Schueck, C ^[2]; Lindsay, R ^[3]; Mabala, G K ^[1]; Ragnarsson, I ^[4]

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1. iThemba LABS, P.O. Box 722, 7129 Somerset West (South Africa)
2. Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse, IN2P3, F-91405 Orsay (France)
3. University of the Western Cape, Private Bag X17, 7535 Bellville (South Africa)
4. Division of Mathematical Physics, LTH, Lund University, SE-221 00 Lund (Sweden)

A candidate for chiral bands was found in {sup 198}Tl for the first time in a mass region of oblate (or nonaxial with {gamma}{>=}30 deg.) deformed nuclei. Two bands show very similar quasiparticle alignments, moments of inertia, and B(M1)/B(E2) ratios. They have a relative excitation energy of about 500 keV and different patterns of energy staggering. Calculations using the two-quasiparticle-plus-triaxial-rotor model with residual proton-neutron interaction included show that a triaxial deformation with {gamma}{approx}44 deg. agrees very well with all the experimental observations. Furthermore, considerable energy staggering for both partner bands was calculated for this {pi}h{sub 9/2} x {nu}i{sub 13/2}{sup -1} configuration at {gamma}{approx}30 deg., suggesting that chiral bands may have substantial energy staggering.

• OSTI ID: 21192089
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 2; Other Information: DOI: 10.1103/PhysRevC.78.021305; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHIRALITY
CONFIGURATION
DEFORMATION
DEFORMED NUCLEI
EXCITATION
KEV RANGE
MASS
MOMENT OF INERTIA
ODD-ODD NUCLEI
PROTON-NEUTRON INTERACTIONS
RESIDUAL INTERACTIONS
ROTORS
SIMULATION
THALLIUM 198