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Yurevich, V.I.; Fomenko, K.A., E-mail: yurevich@jinr.ru
Veksler and Baldin Lab. of High Energy Physics, Joint Inst. for Nuclear Research, Dubna (Russian Federation)2012
Veksler and Baldin Lab. of High Energy Physics, Joint Inst. for Nuclear Research, Dubna (Russian Federation)2012
AbstractAbstract
[en] Fission and fragmentation of ultrarelativistic 208Pb nuclei in collisions with gold nuclei were studied with beam of SPS/CERN at an energy of 158 GeV/nucleon. Detectors of target area of NA45/CERES spectrometer were used in the measurements. The obtained magnitude of the fission cross section is (301±44) mb where approximately 77% of the events are due to electromagnetic interactions of the colliding nuclei and the rest part is the contribution of peripheral nuclear interactions. Spallation of the lead nuclei with production of heavy fragments occurs only in collisions with values of impact parameter b > 10 fm. Total disintegration of the lead nuclei into intermediate mass fragments and light particles is observed in some peripheral collisions
Original Title
Delenie i fragmentatsiya yader 208Pb v stolknoveniyakh s yadrami zolota pri ehnergii 158 GehV/nuklon
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2012; 16 p; Also available online: http://www1.jinr.ru/Preprints/2012/085(P1-2012-85).pdf; 22 refs., 12 figs., 3 tabs. Submitted to the journal, Yadernaya Fizika
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