Münster 2002 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 10: Poster Session: Nuclear Physics/Spectroscopy

HK 10.34: Poster

Dienstag, 12. März 2002, 10:30–12:45, Foyer Chemie

Dilepton detection in the Plastic Ball detector at KVI — •M. Kiš¹, H. Amir Ahmadi¹, J.C.S. Bacelar¹, R. Castelijns¹, R. Čaplar², K. Ermisch¹, I. Gašparić², M.N. Harakeh¹, N. Kalantar-Nayestanaki¹, H. Löhner¹, and M. Mahjour-Shafiei¹ — ¹Kernfysisch Versneller Instituut, Groningen, The Netherlands — ²Institut Rugjer Bošković, Zagreb, Croatia

The Plastic Ball detector, a 4π array with approximately 550 plastic phoswitch scintillators, has been coupled with the SALAD detector at KVI. It was used for the detection of electron-positron pairs originating from virtual bremsstrahlung production in a proton-proton scattering at 190 MeV.The Plastic Ball covers about 77% of the 4π solid angle which together with the good particle identification properties of the phoswich detector modules leads to much better conditions for the dilepton detection as compared with previous experiment. The preliminary results of the ongoing work on the data analysis will be presented.