  We perform a systematic numerical study, based on the time-dependent
Gross-Pitaevskii equation, of jet formation in collapsing and exploding
Bose-Einstein condensates as in the experiment by Donley et al [2001 Nature 412
295]. In the actual experiment, via a Feshbach resonance, the scattering length
of atomic interaction was suddenly changed from positive to negative on a
pre-formed condensate. Consequently, the condensate collapsed and ejected atoms
via explosion. On a disruption of collapse by suddenly changing the scattering
length to zero a radial jet of atoms was formed in the experiment. We present a
satisfactory account of jet formation under the experimental conditions as well
as make predictions beyond experimental conditions which can be verified in
future experiments.
