Measurement of Evaporation Residue and Fission Cross Sections of the Reaction <SUP>30</SUP>Si + <SUP>238</SUP>U at Subbarrier Energies

• Nishio K.

  Japan Atomic Energy Agency

• Hofmann S.

  Gesellschaft für Schwerionenforschung mbH Institut für Kernphysik, Johann Wolfgang Goethe-Universität

• Ikezoe H.

  Japan Atomic Energy Agency

• Heßberger F. P.

  Gesellschaft für Schwerionenforschung mbH

• Ackermann D.

  Gesellschaft für Schwerionenforschung mbH

• Antalic S.

  Department of Nuclear Physics, Comenius University

• Comas V. F.

  Higher Institute of Technologies and Applied Sciences

• Gan Z.

  Institute of Modern Physics, Chinese Academy of Sciences

• Heinz S.

  Gesellschaft für Schwerionenforschung mbH

• Heredia J. A.

  Higher Institute of Technologies and Applied Sciences

• Khuyagbaatar J.

  Gesellschaft für Schwerionenforschung mbH

• Kindler B.

  Gesellschaft für Schwerionenforschung mbH

• Kojouharov I.

  Gesellschaft für Schwerionenforschung mbH

• Kuusiniemi P.

  CUPP, University of Oulu

• Lommel B.

  Gesellschaft für Schwerionenforschung mbH

• Mazzocco M.

  Gesellschaft für Schwerionenforschung mbH

• Mitsuoka S.

  Japan Atomic Energy Agency

• Nagame Y.

  Japan Atomic Energy Agency

• Ohtsuki T.

  Laboratory of Nuclear Science, Tohoku University

• Popeko A. G.

  Flerov Laboratory of Nuclear Reactions, JINR

• Saro S.

  Department of Nuclear Physics, Comenius University

• Schött H. J.

  Gesellschaft für Schwerionenforschung mbH

• Sulignano B.

  Gesellschaft für Schwerionenforschung mbH Institut für Kernchemie, Johannes Gutenberg-Universität Mainz

• Svirikhin A.

  Flerov Laboratory of Nuclear Reactions, JINR

• Tsukada K.

  Japan Atomic Energy Agency

• Tsuruta K.

  Japan Atomic Energy Agency

• Yeremin A. V.

  Flerov Laboratory of Nuclear Reactions, JINR

Bibliographic Information

Other Title

• Measurement of Evaporation Residue and Fission Cross Sections of the Reaction 30Si + 238U at Subbarrier Energies

Abstract

Effects of the prolate deformation of ²³⁸U on fusion were studied in the reaction ³⁰Si + ²³⁸U at bombarding energies close to the Coulomb barrier. The fission (capture) cross sections were measured at the JAEA tandem accelerator to see the enhancement of the cross sections in the subbarrier energy due to the lower Coulomb barrier in the collisions of projectile at the polar sides of ²³⁸U. In order to obtain the direct evidence for complete fusion, evaporation residue cross sections were measured at UNILAC of GSI. At the subbarrier energy of E_c.m. = 133. 0 MeV, where only polar collisions to ²³⁸U occur, we measured three spontaneously fissioning nuclei which we assigned to the isotope ²⁶⁴Sg. The obtained cross section (10⁺¹⁰_-6) pb was smaller than the calculation that the system captured at the polar collisions results in complete fusion, suggesting the competition between fusion and quasifission. At the above barrier energy of E_c.m. = 144.0 MeV, where collisions on the equatorial side of ²³⁸U start to contribute, we observed α-decay chains starting from ²⁶³Sg and the cross section was determined to be (67⁺⁶⁷_-37) pb. The data was reproduced by the calculation that the system captured from the equatorial side of ²³⁸U results in complete fusion .

Journal

• Journal of Nuclear and Radiochemical Sciences

  Journal of Nuclear and Radiochemical Sciences 8 (2), 73-78, 2007

  The Japan Society of Nuclear and Radiochemical Sciences

Details

• CRID: 1390001204480765312
• NII Article ID: 10021101904
• NII Book ID: AA11948402
• DOI: 10.14494/jnrs2000.8.73
• COI: 1:CAS:528:DC%2BD2sXhsVCgtbzE
• ISSN: 18835813
• ISSN: 13454749
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed