title: Observation of the β-delayed γ-proton decay of (56)Zn and its impact on the Gamow-Teller strength evaluation.
abstract: We report the observation of a very exotic decay mode at the proton drip line, the β-delayed γ-proton decay, clearly seen in the β decay of the T_{z}=-2 nucleus ^{56}Zn. Three γ-proton sequences have been observed after the β decay. Here this decay mode, already observed in the sd shell, is seen for the first time in the fp shell. Both γ and proton decays have been taken into account in the estimation of the Fermi and Gamow-Teller strengths. Evidence for fragmentation of the Fermi strength due to strong isospin mixing is found.
authors.affiliation: Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain.
authors.forename: S E A
authors.initials: SE
authors.lastname: Orrigo
authors.affiliation: Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Rubio
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan and Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Fujita
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Blank
authors.affiliation: Department of Physics, University of Surrey, Guildford GU2 7XH, Surrey, United Kingdom.
authors.forename: W
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authors.lastname: Gelletly
authors.affiliation: Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain.
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authors.initials: J
authors.lastname: Agramunt
authors.affiliation: Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain and Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen H-4026, Hungary.
authors.forename: A
authors.initials: A
authors.lastname: Algora
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Ascher
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: B
authors.initials: B
authors.lastname: Bilgier
authors.affiliation: Grand Accélérateur National d'Ions Lourds, BP 55027, F-14076 Caen, France.
authors.forename: L
authors.initials: L
authors.lastname: Cáceres
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: R B
authors.initials: RB
authors.lastname: Cakirli
authors.affiliation: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
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authors.initials: H
authors.lastname: Fujita
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Ganioğlu
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Gerbaux
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Giovinazzo
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Grévy
authors.affiliation: Grand Accélérateur National d'Ions Lourds, BP 55027, F-14076 Caen, France.
authors.forename: O
authors.initials: O
authors.lastname: Kamalou
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: H C
authors.initials: HC
authors.lastname: Kozer
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: L
authors.initials: L
authors.lastname: Kucuk
authors.affiliation: Centre d'Etudes Nucléaires de Bordeaux Gradignan, CNRS/IN2P3-Université Bordeaux 1, 33175 Gradignan Cedex, France.
authors.forename: T
authors.initials: T
authors.lastname: Kurtukian-Nieto
authors.affiliation: Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain and Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile.
authors.forename: F
authors.initials: F
authors.lastname: Molina
authors.affiliation: SCK·CEN, Boeretang 200, 2400 Mol, Belgium.
authors.forename: L
authors.initials: L
authors.lastname: Popescu
authors.affiliation: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A M
authors.initials: AM
authors.lastname: Rogers
authors.affiliation: Department of Physics, Istanbul University, Istanbul 34134, Turkey.
authors.forename: G
authors.initials: G
authors.lastname: Susoy
authors.affiliation: Grand Accélérateur National d'Ions Lourds, BP 55027, F-14076 Caen, France.
authors.forename: C
authors.initials: C
authors.lastname: Stodel
authors.affiliation: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan.
authors.forename: A
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authors.lastname: Tamii
authors.affiliation: Grand Accélérateur National d'Ions Lourds, BP 55027, F-14076 Caen, France.
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authors.initials: JC
authors.lastname: Thomas