Speaker
Description
Double charge exchange excitations (DCX) induced by heavy ion beams at intermediate energies [1],[2] attract a lot of interest in relations with new collective excitations such as double isobaric analog states (DIAS) and double Gamow-Teller giant resonance (DGTR) . This reaction is also closely linked with double beta decay matrix elements. In 1980s, the double charge exchange reactions (DCX) were performed by using pion beams, i.e.,
A new research program based on a new DCX reaction (
In this talk, I will present a microscopic study of DGTR within a framework of microscopic Hartree-Fock+BCS (or Bogolyubov) and QRPA. The results of QRPA will be also examined by analytic formulas to calculate the excitation energies of the DIAS and DGT strength using commutator relations for the double isospin
[References]
[1] M. Takaki, T. Uesaka et al., Proposal for experiment at RCNP, "Search for double Gamow Teller giant resonances in
[2] F. Cappuzzello et al., Journal of Physics: Conference Series 630, 012018 (2015).
[3] H. Sagawa and Uesaka, Phys. Rev. C94, 064325 (2016) and H. Sagawa, to be published.