The gamma ray detection threshold temperature of different superheated droplet detectors.

The response of superheated droplet detectors (SDD) loaded with four different active liquids, R-12 (CClF), R-114 (CClF), R-134a (CHF) and R-610 (CF) have been studied to obtain the gamma ray detection threshold temperature (T) of the respective detectors. A Cs gamma ray source is used for this study. To obtain T from the experimental data a phenomenological model has been used.

Note: A new optical method for the detection of bubble nucleation in superheated droplet detector.

A superheated droplet detector (SDD) consists of a large number of micron-sized superheated liquid drops suspended in a gel medium. The vaporization of a superheated drop is associated with the emission of an acoustic signal. A novel optical method is developed for the detection of this acoustic signal.

The mathematics of dilution.

The major objection to homeopathic medicine is that the doses of medicine prescribed in some cases are too dilute for any active ingredient to be present. The medicines would hence be rendered inactive, necessitating novel explanations for the action. A further examination of dilution in the light of the Langmuir equation shows that homeopathic medicines may not be as dilute as a simplistic application of Avogadro's Principle suggests, due to surface effects.

Characterization of R-134a superheated droplet detector for neutron detection.

R-134a (C2H2F4) is a low cost, easily available and chlorine free refrigerant, which in its superheated state can be used as an efficient neutron detector. Due to its high solubility in water the R-134a based superheated droplet detectors (SDD) are usually very unstable unless the detector is fabricated using a suitable additive, which stabilizes the detector. The SDD is known to have superheated droplets distributed in a short-lived and in a relatively long-lived metastable states.