Publications [#313668] of Anton P. Tonchev

Papers Published
  1. Tonchev, AP; Angell, C; Boswell, M; Howell, CR; Karwowski, HJ; Kelley, JH; Tornow, W; Tsoneva, N, Low-energy dipole modes of excitation below the neutron separation energy, AIP Conference Proceedings, vol. 819 (2006), pp. 350-354 [doi] .

    The nuclear resonance fluorescence experiments have been performed at the High Intensity Gamma Source (HIγS) on 138Ba nuclei using four 60% efficient HPGe detectors. Excitation energies, spin, parities, and decay branching ratios were measured for the low-energy dipole modes of excitations. Experimental results on the parity measurement below the neutron separation energy shows that all dipole states in this energy region exhibit E1 excitation. These results are consistent with theoretical prediction of the collective isoscalar nature of this low-energy mode of excitation. © 2006 American Institute of Physics.