6533b86dfe1ef96bd12c9f68
RESEARCH PRODUCT
Effect of a Triaxial Nuclear Shape on Proton Tunneling: The Decay and Structure of 145Tm
Zhi LiuS. K. SinhaJ. ShergurGaurab MukherjeeT. L. KhooN. J. HammondWilliam B. WaltersB. BlankS. J. FreemanP. J. WoodsC. ScholeyR. V. F. JanssensN. HotelingA. RobinsonD. SeweryniakT. DavinsonK. StarostaM. P. CarpenterA. WoehrC. N. Davidssubject
PhysicsProton010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaHadronGamma rayGeneral Physics and Astronomy[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Coupling (probability)01 natural sciencesGamma RaysExcited state0103 physical sciencesQuasiparticle23.20.Lv 23.50.+z 27.60.+jAtomic physicsProtons010306 general physicsNucleonRadioactive decaydescription
Gamma rays deexciting states in the proton emitter 145Tm were observed using the recoil-decay tagging method. The 145Tm ground-state rotational band was found to exhibit the properties expected for an h{11/2} proton decoupled band. In addition, coincidences between protons feeding the 2{+} state in 144Er and the 2{+}-->0{+} gamma-ray transition were detected, the first measurement of this kind, leading to a more precise value for the 2{+} excitation energy of 329(1) keV. Calculations with the particle-rotor model and the core quasiparticle coupling model indicate that the properties of the pi{11/2} band and the proton-decay rates in 145Tm are consistent with the presence of triaxiality with an asymmetry parameter gamma approximately 20 degrees .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 |