2-PHONON GIANT-DIPOLE RESONANCE IN PB-208

Authors
BORETZKY K STROTH J WAJDA E AUMANN T BLAICH T CUB J ELZE TW EMLING H HENNING W HOLZMANN R KLINGLER H KULESSA R KRATZ JV LAMBRECHT D LEIFELS Y LUBKIEWICZ E STELZER K WALUS W ZINSER M ZUDE E
Citation
K. Boretzky et al., 2-PHONON GIANT-DIPOLE RESONANCE IN PB-208, Physics letters. Section B, 384(1-4), 1996, pp. 30-36
Citations number
24
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
384
Issue
1-4
Year of publication
1996
Pages
30 - 36
Database
ISI
SICI code
0370-2693(1996)384:1-4<30:2GRIP>2.0.ZU;2-M
Abstract
Excitation of the two-phonon isovector giant dipole resonance was obse rved in Pb-208 projectiles incident on different target nuclei (C, Sn, Ho, Pb, U) at high energy (640 A . MeV). Evidence is found for a two- step electromagnetic excitation mechanism. An enhancement of 1.33(16) for the excitation cross section is observed relative to the harmonic approximation. Neutron- and gamma-decay probabilities are derived as w ell.