Bochum 2009 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HK: Fachverband Hadronen und Kerne

HK 55: Heavy Ion Collisions and QCD phases

HK 55.3: Talk

Wednesday, March 18, 2009, 17:30–17:45, H-ZO 10

Resonance phenomena in heavy nuclei collisions and structurization of positron spectrum — •Alexander Glushkov — Odessa University, P.O.Box 24a, Odessa-9, Ukraine, 65009 — Russian Academy of Sciences, Troitsk, Russia, 142090

A consistent unified quantum mechanics and QED approach is used for studying the electron-positron pair production (EPPP) process in the heavy nuclei collisions and treating the compound nucleus in an extreme electromagnetic field. The positron spectrum narrow peaks as a spectrum of the resonance states of compound super heavy nucleus are treated. To calculate the EPPP cross-section we use the modified versions of the relativistic energy approach, based on the S-matrix Gell-Mann and Low formalism [1]. The nuclear system dynamics is treated within the Dirac equation with an effective potential [2]. We present the calculation results for cross-sections at different collision energies, corresponding to energies of the resonances of the compound 238U+238U, 232Th+250Cf and 238U+248Cm nuclei. Calculation with 2-pocket nuclear potential is carried out and led to principally the same physical picture as 1-pocket one [1], besides an appearance of some new peaks. References: 1. A.Glushkov, L.Ivanov, Phys.Lett.A170,36 (1992);Preprint ISAN,N5, Troitsk,1992; A.Glushkov etal,Nucl. Phys.A.734S, 21 (2004); Europ.Phys.Journ.ST 160, 195 (2008). 2. V.Zagrebaev, V.Samarin, W.Greiner, Phys.Rev.C. 75, 035809 (2007);J.Phys.G.34,1 (2007).