title: Photoneutron cross sections for unstable neutron-rich oxygen isotopes.
abstract: The dipole response of stable and unstable neutron-rich oxygen nuclei of masses A = 17 to A = 22 has been investigated experimentally utilizing electromagnetic excitation in heavy-ion collisions at beam energies about 600 MeV/nucleon. A kinematically complete measurement of the neutron decay channel in inelastic scattering of the secondary beam projectiles from a Pb target was performed. Differential electromagnetic excitation cross sections d sigma/dE were derived up to 30 MeV excitation energy. In contrast to stable nuclei, the deduced dipole strength distribution appears to be strongly fragmented and systematically exhibits a considerable fraction of low-lying strength.
authors: Institut für Kernphysik, Johann Wolfgang Goethe-Universität, D-60486 Frankfurt, Germany.
authors: A
authors: A
authors: Leistenschneider
authors: T
authors: T
authors: Aumann
authors: K
authors: K
authors: Boretzky
authors: D
authors: D
authors: Cortina
authors: J
authors: J
authors: Cub
authors: U
authors: U
authors: Datta Pramanik
authors: W
authors: W
authors: Dostal
authors: T W
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authors: Elze
authors: H
authors: H
authors: Emling
authors: H
authors: H
authors: Geissel
authors: A
authors: A
authors: Grünschloss
authors: M
authors: M
authors: Hellstr
authors: R
authors: R
authors: Holzmann
authors: S
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authors: Ilievski
authors: N
authors: N
authors: Iwasa
authors: M
authors: M
authors: Kaspar
authors: A
authors: A
authors: Kleinböhl
authors: J V
authors: JV
authors: Kratz
authors: R
authors: R
authors: Kulessa
authors: Y
authors: Y
authors: Leifels
authors: E
authors: E
authors: Lubkiewicz
authors: G
authors: G
authors: Münzenberg
authors: P
authors: P
authors: Reiter
authors: M
authors: M
authors: Rejmund
authors: C
authors: C
authors: Scheidenberger
authors: C
authors: C
authors: Schlegel
authors: H
authors: H
authors: Simon
authors: J
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authors: Stroth
authors: K
authors: K
authors: Sümmerer
authors: E
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authors: Wajda
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authors: W
authors: Walús
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authors: Wan