Eur. Phys. J. A 10, 171-175
Peculiarities in fragment mass distribution in the + (243 MeV) reactionYu.V. Pyatkov1, Yu.E. Penionzhkevich2, W.H. Trzaska3, O.I. Osetrov4, A.A. Alexandrov2, I.A. Alexandrova2, J. Äystö3, K.-Th. Brinkmann5, S.V. Khlebnikov4, V.F. Kushniruk2, A.V. Kuznetsov4, V.G. Lyapin4, V.A. Maslov2, M. Mutterer6, Z. Radivojevich3, V.A. Rubchenya4, Yu.G. Sobolev2, G.P. Tiourine4 and D.N. Vakhtin3
1 Moscow Engineering Physics Institute, Moscow, Russia
2 Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Russia
3 Department of Physics of University of Jyväskylä, Jyväskylä, Finland
4 Khlopin Radium Institute, St.Petersburg, Russia
5 Technical University, Dresden, Germany
6 Technical University, Darmstadt, Germany
(Received: 8 August 2000 / Revised version: 29 December 2000 Communicated by C. Signorini)
A pronounced fine structure (FS) in the form of distinct peaks was observed in neutron gated mass spectra from the decay of the 278110 composite system produced in the reaction + (243 MeV) at an initial excitation energy E*> 70 MeV. The FS peaks are located in the vicinity of mass numbers 70-80, 100, and 130, which correspond to those of magic nuclei (clusters). In the data there is also evidence for a new type of decay -collinear cluster tripartition of an excited nucleus.
25.70.Lm - Strongly damped collisions.
25.70.Pq - Multifragment emission and correlations.
25.85.Ge - Charged-particle-induced fission.
© Società Italiana di Fisica, Springer-Verlag 2001