title: Energy levels in 139La from the decay of 139Ba.
abstract: The gamma-ray spectrum of 139La following the beta- decay of 139Ba has been studied using both singles and gammagamma coincidence spectroscopy techniques. The energies and intensities of 30 gamma-transitions have been determined, which include three new transitions placed in the level scheme. Two new levels at 1524.6 and 1900.3 keV excitation energies are proposed and a number of gamma-transitions have been confirmed. On the basis of these results a precise decay scheme is proposed.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, São Paulo, Brazil.
authors.forename: C B
authors.initials: CB
authors.lastname: Zamboni
authors.forename: J A
authors.initials: JA
authors.lastname: Medeiro
authors.forename: A L
authors.initials: AL
authors.lastname: Lapolli
authors.forename: F A
authors.initials: FA
authors.lastname: Genezini
authors.forename: S P
authors.initials: SP
authors.lastname: Camargo
authors.forename: M T
authors.initials: MT
authors.lastname: da Cruz
authors.forename: J Y
authors.initials: JY
authors.lastname: Zevallos-Chávez