Publications [#313693] of Anton P. Tonchev

Papers Published
  1. Pietralla, N; Litvinenko, VN; Hartman, S; Mikhailov, FF; Pinayev, IV; Swift, G; Ahmed, MW; Kelley, JH; Nelson, SO; Prior, R; Sabourov, K; Tonchev, AP; Weller, HR, Identification of the Jπ=1-two-phonon state of88Sr, Physical Review C, vol. 65 no. 4 (April, 2002), pp. 473051-473053 .

    The linearly polarized γ-ray beam produced by the HIγS facility has been used to determine the parity of two previously known dipole excitations in 88 Sr. The azimuthal asymmetry of γ rays produced in the process of nuclear resonance fluorescence indicated that the dipole state at 4.742 MeV, recently discussed as a new form of M 1 excitation, is in fact a 1 - (E1) state. The 1 - state at 4.742 MeV must, therefore, be reconsidered as the J π = 1 -1 member of the quadrupole-octupole coupled two-phonon multiplet. A second state at 7.53.5 MeV was also assigned J π = 1 - .