Eur. Phys. J. A 17, 57-63 (2003)
DOI: 10.1140/epja/i2002-10132-7

Production of neutron-rich nuclei in fission induced by neutrons generated by the reaction at 55 MeV

L. Stroe¹, G. Lhersonneau¹, A. Andrighetto¹, P. Dendooven², J. Huikari², H. Penttilä², K. Peräjärvi², L. Tecchio¹ and Y. Wang<sup>2

1</sup>  INFN, Laboratori Nazionali di Legnaro, 35020 Legnaro, Padova, Italy
²  Department of Physics, University of Jyväskylä, P.O. Box 35, 40351-Jyväskylä, Finland

stroe@pd.infn.it

(Received: 8 November 2002 / Revised version: 19 December 2002 / Published online: 15 April 2003)

Abstract
Cross-sections for the production of neutron-rich nuclei obtained by neutron-induced fission of natural uranium have been measured. The neutrons were generated by bombarding a ¹³C target with 55 MeV protons. The results, position of the maximum in the (Z,A)-plane, width and magnitude, are very comparable with those where the neutrons are generated by bombardment of natural ¹²C graphite with 50 MeV deuterons. Depending on the geometry of the converter/target assembly the isotope yields, however, are a factor of 2-3 lower due to less efficient production of neutrons per primary projectile, especially at small forward angles.

PACS
24.75.+i - General properties of fission.
25.85.Ec - Neutron-induced fission.

© Società Italiana di Fisica, Springer-Verlag 2003