Author/Authors :
T. KIBEDI، نويسنده , , G.D. Dracoulis، نويسنده , , A.P. Byrne، نويسنده , , P.M. Davidson، نويسنده ,
Abstract :
Excited states in 170W, 172W, 174W, 176W and 178W have been populated in the β-decay of 170–178Re isotopes and studied using γ-ray singles and coincidence techniques, utilising the high efficiency of a Compton-suppressed array, and conversion electron systems. Many new states at low excitation energies have been identified, complementing the level schemes previously established from in-beam studies. A large body of data on decay properties, spins and parities, and relative E2 and E0 matrix elements has been obtained. The properties of the Kπ=0+ (“quasi”-β) and the Kπ=2+ (“quasi”-γ) bands are compared with similar bands observed in light osmium, platinum and mercury isotopes, where shape coexistence has been established at low spin.
Keywords :
172 , 164Er(19F , E2 branching ratios and E0/E2 strengths between “quasi”-? , 144Sm(32S , singles ? and ce , E=153 MeV , J , 4n) , ICC , 3n) , ?–?–t , 149Sm(31P , ? , 178W , 173Yb(11B , Compton-suppressed HPGe detector array , 144Sm(31P , 6n) , superconducting solenoid electron spectrometer , p2n) , Deduced levels , 174 , 5n) , “quasi”-? , Radioactivity170 , E=148 MeV , E2/M1 mixing ratios , E=150 MeV , Measured: View the MathML source , Band-mixing model and shape coexistence , 5n) , E=73 MeV , Nuclear structure Energy systematics “quasi”-? and “quasi”-? bands in even–even tungsten isotopes , 176 , E=110 MeV , second excited K?=0+ and the ground-state band levels , 144Sm(31P , View the MathML source , E=150 MeV , ?–?(?)
