title: Lifetime Measurements in (178)Hf.
abstract: Lifetimes of levels from K(π) = 2(+), K(π) = 4(+) and several K(π) = 0(+) bands have been measured in the (178)Hf nucleus using the GRID technique. Lifetimes of the 2(+) and 3(+) levels were measured within the K(π) = 2(+) γ band. A lower limit was established for the lifetime of the 4(+) level of the K(π) = 4(+) band. The resulting upper limits for the absolute B(E2) values exclude collective transitions from the K(π) = 4(+) to the ground state band but not to the K(π)= 2(+) band. Level lifetimes were also measured for several states within three separate K(π)= 0(+) bands. Evidence is presented for a previously unobserved case of two excited K(π)= 0(+) bands being connected via collective E2 transitions.
authors.affiliation: Physics Department, University of Notre Dame, Notre Dame, Indiana 46556.
authors.forename: R C
authors.initials: RC
authors.lastname: de Haan
authors.affiliation: Physics Department, University of Notre Dame, Notre Dame, Indiana 46556.
authors.forename: A
authors.initials: A
authors.lastname: Aprahamian
authors.affiliation: Institut Laue-Langevin, 38042 Grenoble, France.
authors.forename: H G
authors.initials: HG
authors.lastname: Börner
authors.affiliation: Institut Laue-Langevin, 38042 Grenoble, France.
authors.forename: C
authors.initials: C
authors.lastname: Doll
authors.affiliation: Institut Laue-Langevin, 38042 Grenoble, France.
authors.forename: M
authors.initials: M
authors.lastname: Jentschel
authors.affiliation: University of Brighton, Brighton, BN2 4GJ, United Kingdom.
authors.forename: A M
authors.initials: AM
authors.lastname: Bruce
authors.affiliation: Physics Department, University of Notre Dame, Notre Dame, Indiana 46556.
authors.forename: S R
authors.initials: SR
authors.lastname: Lesher
keywords: level lifetimes; phonon excitations; radioactive hafnium