Spectral structure of the pygmy dipole resonance.


Journal Article

High-sensitivity studies of E1 and M1 transitions observed in the reaction 138Ba(gamma,gamma{'}) at energies below the one-neutron separation energy have been performed using the nearly monoenergetic and 100% linearly polarized photon beams of the HIgammaS facility. The electric dipole character of the so-called "pygmy" dipole resonance was experimentally verified for excitations from 4.0 to 8.6 MeV. The fine structure of the M1 "spin-flip" mode was observed for the first time in N=82 nuclei.

Full Text

Duke Authors

Cited Authors

  • Tonchev, AP; Hammond, SL; Kelley, JH; Kwan, E; Lenske, H; Rusev, G; Tornow, W; Tsoneva, N

Published Date

  • February 18, 2010

Published In

Volume / Issue

  • 104 / 7

Start / End Page

  • 072501 -

PubMed ID

  • 20366874

Pubmed Central ID

  • 20366874

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.104.072501


  • eng