New results on low-energy fission with high-energy RNB

✍ Scribed by M. de Jong; C. Böckstiegel; H.-G. Clerc; A. Grewe; A. Junghans; J. Müller; S. Steinhäuser; J. Benlliure; A. Heinz; K.-H. Schmidt; M. Pfützner; A. Ignatyuk; G. Kudyaev

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 443 KB
• Volume: 616
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00112-7

✦ Synopsis

At the fragment separator (FRS) at GSI D armstadt fission studies with a number of secondary beams produced by fragmentation of a 1 A.GeV 238U beam have been performed. Fission-in-flight was induced in a secondary lead target at average secondary-beam kinetic energies of about 400 MeV.A. By measuring the velocities and the energy losses of both fission fragments t.heir nuclear charges could be determined. From the data, fissionfragment charge distributions for electromagnetic-induced fission in lead at an average excitation energy of 10 MeV were extracted.

Our method offers the possibility to vary the A/Z-ratio of the secondary-beam particle over a wide range and thus to investigate the proton even-odd effect as well as the transition from symmetric fission to asymmetric fission in a region of the chart of the nuclides which was difficult to reach in previous fission studies.