Speaker
Dr
Olga Khetselius
(Odessa University)
Description
In the last few years transition energies in pionic and kaonic atoms have been measured with an unprecedented precision [1]. The spectroscopy of hadronic hydrogen allows to study the strong interaction at low energies [2] by measuring the energy and width of the ground level with a precision of few meV. The light hadronic atoms can additionally be used to define new low-energy X-ray standards and to evaluate the pion mass using high accuracy X-ray spectroscopy. Paper is devoted to studying spectra for hadronic (kaonic and pionic) atoms and some superheavy isotopes. Ab initio QED approach [3] with an accurate account of relativistic, nuclear, radiative effects is used in calculating spectra of the hadronic (pion, kaon) atoms. One of the main purposes is establishment a quantitative link between quality of nucleus structure modeling and accuracy of calculating energy and spectral properties of systems. The wave functions zeroth basis is found from the Klein-Gordon or Dirac equation. The potential includes the SCF ab initio potential, the electric and polarization potentials of a nucleus (the RMF, Fermi and Gauss models for a charge distribution in a nucleus are considered). For low orbits there are the important effects due to the strong hadron-nuclear interaction. The energy shift is connected with a length of the hadron-nuclear scattering. For superheavy isotopes (ions) the correlation corrections of high orders are accounted for within the Green function method. The Lamb shift polarization part- in the Uhling-Serber approximation and the self-energy part – within the Green functions method. We present the data on: 1).energy levels for superheavy isotopes Z=113,114; 2). Shifts and widths of transitions (2p-1s,3d-2p, 4f-3d etc) in some pionic and kaonic atoms (H, He, N, W, U). The calculated X-ray transitions spectrum for kaonic He and estimate of 2p level shift due to the strong K-N interaction 1.57 eV are in the reasonable agreement with experimental data (cited shift 1.9eV) by Okada et al (2008; E570; КЕК 12GeV, RIKEN Nishina Centre, JAPAN) and differ (about order) of other experimental data by Wiegand-Pehl (1971), Batty et al (1979), Baird et al (1983).
References:
1. D. Gotta, Progr. in Part. and Nucl. Phys. 52, 133 (2004); G. Beer, A. Bragadireanu, W. Breunlich et al, Phys. Lett. B 535, 52 (2002) ; R.Deslattes, E.Kessler, P.Indelicato, et al, //Rev. Mod. Phys. 75, 35 (2003); M.Trassinelli, P.Indelicato, arXiv:phys/0611262v2 (2007).
2. C.J.Batty, M.Eckhause, K.P.Gall etal//Phys.Rev.C. 40, 2154 (1989); T.Ito, R.Hayano, S.Nakamura, T.Terada, Phys. Rev. C. 58, 2366 (1998); S.Okada, G.Beer, H.Bhang etal, Phys.Lett.B.653, 387 (2007).
3. A.V.Glushkov et al, Phys. Lett. 170, 35 (1992) ; Frontiers in Quantum Systems in Chem. and Phys. (Berlin, Springer) 8, 505 (2008); Theory and Applications of Comp. Chem. (AIP) 1102, 168 (2009).
Primary author
Dr
Olga Khetselius
(Odessa University)
Co-authors
Prof.
Alexander Glushkov
(Odessa University and Troitsk ISAN, Russian Acad.Sci.)
Ms
Anastasiya Shakhman
(Kherson University)
Prof.
Andrey Svinarenko
(Odessa University)
Dr
Inga Serga
(Odessa University)