  The values of the nucleation parameter, k, for bubble nucleation induced by
high energy heavy ions 12C (180 MeV/u), 20Ne (400 MeV/u) and 28Si (350 MeV/u)
in superheated emulsion detector are determined by comparing the experimentally
obtained normalized count rates with those obtained from simulations done using
the GEANT3.21 simulation code. The results show that the nucleation parameter
depends on the mass number of the incident heavy ions, and decreases with
increasing mass number.
