Publications [#313672] of Anton P. Tonchev

Papers Published
  1. Tonchev, AP; Hammond, SL; Kelley, JH; Kwan, E; Lenske, H; Rusev, G; Tornow, W; Tsoneva, N, Spectral structure of the pygmy dipole resonance., Physical Review Letters, vol. 104 no. 7 (February, 2010), pp. 072501 [repository], [doi] .

    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.