Photon sensitivity of superheated drop at room temperature

It has been reported so far that superheated drop detector made of R-12 at room temperature are sensitive to neutrons yet insensitive to photons. This property makes its use as one of the most useful neutron dosimeter. The photon sensitivity of R12 at room temperature when exposed to 59.54kev photons obtained from radioactive Am has been noted for the first time in our laboratory. This discovery is important nt only from the point of view of basic science but more important to the users of R12 in neutron dosimetry to take note of this in assessing the neutron dose correctly.Comment: 3pages, 1 fig. Nuclear Instruments and Method A, 2000, (accepted

Superheated drop as a neutron spectrometer

Superheated drops are known to vaporise when exposed to energetic nuclear radiation since the discovery of bubble chamber. As the degree of superheat increases in a given liquid, less and less energetic neutrons are required to cause nucleation. This property of superheated liquids are being utilised to develope the neutron spectromer. A new principle of neutron spectrometry using Superheated liquid are developed and the developed principle has been tested by Am-Be neutron source.Comment: 9 pages, 8 figures. accepted in Nucl.Instru.MethA,200

Efficiency of neutron detection of superheated drops of Freon-22

Neutron detection efficiency of superheated drops of Freon-22 for neutrons obtained from a 3 Curie Am-Be neutron source has been reported in this paper. Although Freon-22 having lower boiling point than many other similar liquids (e.g., Freon-12, Freon-114, Isobutane) is expected to be more sensitive to neutrons, it has not been reported so far and therefore this paper constitutes the first report on the subject. Neutron detection efficiency of both Freon-22 and Freon-12 have been determined from the measured nucleation rate using the volumetric method developed in our laboratory. The result shows that the neutron detection efficiency of Freon-22 for the neutron energy spectrum obtained from an Am–Be source, is almost double, while the life time is 58.6% smaller than that of Freon-12, for a particular neutron flux of that source

Superheated drop detector: A potential tool in neutron research

The Superheated Drop Detector (SDD) developed in recent years is a potential tool in radiation spectrometry, dosimetry, area monitoring and in many other applications. Its operation under neutron irradiation and possible applications are presented. Among the possible applications of SDD in neutron research, its use in neutron dosimetry has been explored recently and is discussed