title: Large beta-delayed neutron emission probabilities in the 78Ni region.
abstract: The beta-delayed neutron branching ratios (P{betan}) for nuclei near doubly magic 78Ni have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital beta-gamma spectroscopy of 238U fission products. The P{betan} values for the very neutron-rich isotopes ;{76-78}Cu and 83Ga were found to be much higher than previously reported and predicted. Revised calculations of the betan process, accounting for new mass measurements and an inversion of the pi2p{3/2} and pi1f{5/2} orbitals, are in better agreement with these new experimental results.
authors.affiliation: Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA. j.a.winger@msstate.edu
authors.forename: J A
authors.initials: JA
authors.lastname: Winger
authors.forename: S V
authors.initials: SV
authors.lastname: Ilyushkin
authors.forename: K P
authors.initials: KP
authors.lastname: Rykaczewski
authors.forename: C J
authors.initials: CJ
authors.lastname: Gross
authors.forename: J C
authors.initials: JC
authors.lastname: Batchelder
authors.forename: C
authors.initials: C
authors.lastname: Goodin
authors.forename: R
authors.initials: R
authors.lastname: Grzywacz
authors.forename: J H
authors.initials: JH
authors.lastname: Hamilton
authors.forename: A
authors.initials: A
authors.lastname: Korgul
authors.forename: W
authors.initials: W
authors.lastname: Królas
authors.forename: S N
authors.initials: SN
authors.lastname: Liddick
authors.forename: C
authors.initials: C
authors.lastname: Mazzocchi
authors.forename: S
authors.initials: S
authors.lastname: Padgett
authors.forename: A
authors.initials: A
authors.lastname: Piechaczek
authors.forename: M M
authors.initials: MM
authors.lastname: Rajabali
authors.forename: D
authors.initials: D
authors.lastname: Shapira
authors.forename: E F
authors.initials: EF
authors.lastname: Zganjar
authors.forename: I N
authors.initials: IN
authors.lastname: Borzov