  Energy calibration of superheated droplet detector is discussed in terms of
the effective recoil nucleus threshold energy and the reduced superheat. This
provides a universal energy calibration curve valid for different liquids used
in this type of detector. Two widely used liquids, R114 and C4F10, one for
neutron detection and the other for WIMPs dark matter search experiment, have
been compared. Liquid having recoil nuclei with larger values of LET provides
better neutron and gamma discrimination. Gamma response of C4F10 has also been
studied and the results are discussed. Behaviour of nucleation parameter with
the effective recoil nucleus threshold energy and the reduced superheat have
been explored.
