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Experimental evidence for muonicX-rays from fission fragments |
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| Authors: | C. Rösel F. F. Karpeshin P. David H. Hänscheid J. Konijn C. T. A. M. de Laat H. Paganetti F. Risse B. Sabirov L. A. Schaller L. Schellenberg W. Schrieder A. Taal |
| Affiliation: | 1. ISKP, Universit?t Bonn, Nuallee 14-16, W-5300, Bonn 1, Germany 3. Institute of Physics, St. Petersburg State University, 198904, Petrodvorets, Russia 5. NIKHEF-K, P.O. Box 4395, 1009, AJ Amsterdam, The Netherlands 6. Physics Laboratory, University of Utrecht, P.O. Box 80000, 3508, TA Utrecht, The Netherlands 8. Laboratory of Nuclear Problems, JINR, 141980, Dubna, Russia 9. Department of Physics, University of Fribourg, CH-1700, Fribourg, Switzerland |
| Abstract: | In the spectrum of muonic X-rays of238U measured in coincidence with prompt fission events a structure has been found which is attributed to 2p 1s transitions of the muon attached to heavy fragments. The intensityIs of this structure relative to the strengthIpf observed for prompt fission has been determined to beIs/Ipf=(6.0± 2.1) %. Although the experimental significance for the appeareance of this phenomenon is weak, this is the first experimental indication for its occuxence.We are indebted to the following institutes or organizations for financial support: Bundesministerium für Forschung und Technologie der Bundesrepublik Deutschland contract number 06BN271 (CR,PD,HH,FR,WS), Foundation for Fundamental Research on Matter (FOM) and the Netherlands Organization of the Advancement of Pure Research (NWO) (JK,CTAMdL,AT), the Swiss National Foundation (SNF) (LAS,LS), and the Heinrich-Hertz-Foundation (HH) (FFK,BS). |
| Keywords: | KeywordHeading" >PACS 23.20.– g 25.85.– W 36.10.– k 36.10.Dr |
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