  Superheated drops are known to detect neutrons through the nucleation caused
by the recoil nuclei produced by the interactions of neutrons with the atoms
constituting the superheated liquid molecule. A novel method of finding the
neutron energy from the temperature dependence response of SDD has been
developed. From the equivalence between the dependence of threshold energy for
nucleation on temperature of SDD and the dependence of dE/dx of the recoil ions
with the energy of the neutron, a new method of finding the neutron energy
spectrum of a polychromatic as well as monochromatic neutron source has been
developed.
