e+e- pairs from 238U + 206Pb collisions

Simple item page
dc.creatorHeinz, S.
dc.creatorBerdermann, E.
dc.creatorHeine, F.
dc.creatorJoeres, O.
dc.creatorKienle, P.
dc.creatorKoenig, I.
dc.creatorKoenig, W.
dc.creatorKozhuharov, C.
dc.creatorLeinberger, U.
dc.creatorRhein, M.
dc.creatorSchroeter, A.
dc.creatorTsertos, H.
dc.date1996-12-29
dc.date.accessioned2026-07-07T05:37:42Z
dc.date.available2026-07-07T05:37:42Z
dc.descriptionWe present the results from e+e- coincidence measurements in 238U + 206Pb collisions at a beam energy of 5.93 MeV/u, using an improved experimental setup at the double-Orange spectrometer of GSI. The capability of our device to detect Internal-Pair-Conversion (IPC) e+e- pairs from discrete nuclear transitions of a moving emitter is demonstrated by investigating the known 1.844 MeV (E1) transition in 206Pb and the 1.770 MeV (M1) transition in 207Pb, excited via Coulomb excitation and a neutron transfer reaction, respectively. The Doppler-shift corrected e+- sum-energy spectra show weak lines at the expected energies with cross sections being consistent with the measured excitation cross sections of the corresponding $γ$ lines and the theoretically predicted IPC coefficients. No other e+e- sum-energy lines were found in the measured spectra. The observed transfer cross sections show a strong dependence on the distance of closest approach (R_min), thus signaling also a strong dependence on the bombarding energy close to the Coulomb barrier.
dc.description12 pages, standard LaTeX with 3 included PS figures; Submitted to Physics Letters B
dc.identifierhttps://arxiv.org/abs/nucl-ex/9612006
dc.identifierhttp://arxiv.org/abs/nucl-ex/9612006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81366
dc.subjectNuclear Experiment
dc.titlee+e- pairs from 238U + 206Pb collisions
dc.typetext

Files

Collections

arXiv