Photoneutron cross sections for unstable neutron-rich oxygen isotopes

Citation
A. Leistenschneider et al., Photoneutron cross sections for unstable neutron-rich oxygen isotopes, PHYS REV L, 86(24), 2001, pp. 5442-5445
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
24
Year of publication
2001
Pages
5442 - 5445
Database
ISI
SICI code
0031-9007(20010611)86:24<5442:PCSFUN>2.0.ZU;2-J
Abstract
The dipole response of stable and unstable neutron-rich oxygen nuclei of ma sses A = 17 to A = 22 has been investigated experimentally utilizing electr omagnetic excitation in heavy-inn 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 si gma /dE were derived up to 30 MeV excitation energy. In contrast to stable nuclei, the deduced dipole strength distribution appears to be strongly fra gmented and systematically exhibits a considerable fraction of low-lying st rength.