  We study the cascade of Hawking emission spectrum from the event horizon in
presence of one loop back reaction effect in a black hole background. The
spacetime is taken here is the modified Schwarzschild one. The analysis shows
that it is possible to decrease the sparsity with the decrease in black hole
mass. Moreover, at some particular value of mass one has a continuous radiation
cascade. This result is completely new and quite different from the usual one.
An estimation of the mass for continuous one is also found. We see that the
value is of the Planck mass order. In this process it is observed that under a
physical background, below a particular value of the mass the Hawking radiation
must stop and we have a remnant. This was absent in the earlier analysis.
