We designed a precision method for observation of liquid-gas first order phase-transitions. At first we prepare a gas-saturated liquid of well known composition. Then we induce the phase transition by a rapid pressure quench under simultaneous detection of pressure and scattered light. To this end the proceeding phase separation is detected by time resolved light-scattering at constant angle (CAMS). Specifically, we obtain detailed information about the microscopic characteristics of the phase separation process (nucleation / spinodal decomposition), the maximal pressure undershoot, the expansion rate and the preselected growth of the newly evolving phase as well as the nucleation rate. It is the aim of the study to measure homogeneous nucleation rates as function of supersaturation in gas-saturated liquids at constant temperature and to compare the results with classical and other nucleation theories.
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