Eur. Phys. J. A 12, 317-325 (2001)
Complete and incomplete fusion in reactions of
+
at
and 68 MeV from analysis of recoil range and light-particle measurements
R.I. Badran1, D.J. Parker2 and I.M. Naqib3
1 Physics Department, The Hashemite University, P.O. Box 150459, Zarqa, Jordan
2 School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
3 12 Fogwell Road, Oxford OX2 9SA, UK
rbadran_i@yahoo.com
(Received: 29 March 2001 / Revised version: 28 August 2001 Communicated by J. Äystö)
Abstract
Excitation functions for the production of eight radioactive products of the
reactions of
on
have been measured up to
MeV. Recoil range distributions for these products, together
with inclusive proton, deuteron, triton and alpha spectra, have been
measured at energies of 50 and 68 MeV. The
, t and d spectra show
characteristic "break-up" components at forward angles, while the recoil
distributions show evidence of complete fusion and incomplete-fusion
process
(
,
)
. A
parallel study on
shows some evidences of the (
,t)
incomplete-fusion process, but the cross-section for this process is
significantly less than for the triton fusion process. The recoil
distributions can be reproduced on the assumption that essentially all the
observed break-up fragments are in fact associated with incomplete fusion,
but uncertainties in normalisation leave open the possibility of a
significant contribution of pure break-up. A diffraction model of the
(
,
) transfer process reproduces the observed break-up
spectra with some success.
25.70.-z - Low and intermediate energy heavy-ion reactions.
25.70.Jj - Fusion and fusion-fission reactions.
25.70.Hi - Transfer reactions.
© Società Italiana di Fisica, Springer-Verlag 2001
