6533b870fe1ef96bd12cfa89
RESEARCH PRODUCT
A thirty second isomer in Hf
M. HuhtaPearsonJar GriffithPaul CampbellPeter DendoovenI. S. GrantB.l. PerssonD. E. EvansD. S. RichardsonA. HonkanenJuha ÄYstöJ L CookeP D WheelerEca CochraneMarkku OinonenG. TungateT G CooperJ. BillowesL ZybertHeikki Penttiläsubject
PhysicsNuclear and High Energy PhysicsIsotopeExcited stateAnalytical chemistryAtomic physicsSpin (physics)Beam energyBeam (structure)ExcitationIondescription
An isomer has been detected in Hf-171 with a half-life of T-1/2 = 29.5(9) s. The state was populated in the Yb-170(alpha,3n)Hf-171m reaction at a beam energy of E-alpha = 50 MeV in an on-line ion guide isotope separator. The isomeric Hf-17lm(+) beam was extracted from the ion guide, mass-analysed and implanted in the surface of a microchannel-plate. The half-life of the collected activity was measured from the decay of the microchannel-plate count rate. We associate the isomer with the first excited slate in Hf-171 with spin 1/2(-) at an excitation energy of 22(2) keV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-09-01 | Journal of Physics G: Nuclear and Particle Physics |