  We determine the boundary states, associated with a fractional D$p$-brane in
the presence of the Kalb-Ramond field and a $U(1)$ gauge potential. The
background spacetime is the non-compact orbifold $ \mathbb{R}^{1, 21} \otimes
\mathbb{R}^4/ \mathbb{Z}_2$. Besides, the brane has a transverse velocity. We
compute the radiation amplitude of a massless closed string from the
interaction of two fractional D$p$-branes with the previous background fields.
The branes have been dressed by different fields and have transverse motions.
The total radiation amplitude will be investigated for large inter-brane
separation. Finally, the graviton, Kalb-Ramond (axion) and dilaton emissions
will be distinctly studied. Our calculations are in the context of the bosonic
string theory.
