Positron-electron pairs produced in heavy-ion collisions

I. Ahmad, Sam M. Austin, B. B. Back, R. R. Betts, F. P. Calaprice, K. C. Chan, A. Chishti, C. M. Conner, R. W. Dunford, J. D. Fox, S. J. Freedman, M. Freer, S. B. Gazes, A. L. Hallin, Th Happ, D. Henderson, N. I. Kaloskamis, E. Kashy, W. Kutschera, J. LastC. J. Lister, M. Liu, M. R. Maier, D. M. Mercer, D. Mikolas, P. A.A. Perera, M. D. Rhein, D. E. Roa, J. P. Schiffer, T. A. Trainor, P. Wilt, J. S. Winfield, M. Wolanski, F. L.H. Wolfs, A. H. Wuosmaa, A. R. Young, J. E. Yurkon

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14 Scopus citations

Abstract

The production of positron-electron pairs in collisions of 238U+232Th at 5.95 MeV/nucleon, and of 238U +181Ta at 5.95, 6.1, and 6.3 MeV/nucleon, has been studied with the APEX spectrometer at Argonne National Laboratory. Several analyses have been performed to search for sharp structures in sum-energy spectra for positron-electron pairs. Such features have been reported in previous experiments. No statistically convincing evidence for such behavior is observed in the present data.

Original languageEnglish (US)
Article number064601
Pages (from-to)646011-6460114
Number of pages5814104
JournalPhysical Review C - Nuclear Physics
Volume60
Issue number6
StatePublished - Dec 1999

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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