arXiv subjects
Publications and source records attributed to B. Roy.
Superheated droplets are proven to be excelent detectors for neutrons and could be used as a neutron dosimeter. To detect accurately the volume of the vapour formed upon nucleation and hence to observe the nucleation quantitatively an air displacement system has been developed.
Neutron detection efficiency of superheated drops of Freon22 for neutrons obtained from a 3Ci Am-Be neutron source has been reported in this paper. Neutron detection efficiency of both F-22 and F-12 have been determined from the measured nucleation rate using the volumetric method developed in our lab. The result shows that the neutron detection efficiency of F-22 for the energy spectrum obtained from Am-Be is almost double, while the life time is 58.6% smaller than that of F-12, for a particular neutron flux of that source.
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.
We construct a displacement operator type nonlinear coherent state and examine some of its properties. In particular it is shown that this nonlinear coherent state exhibits nonclassical properties like squeezing and sub-Poissonian behaviour.
We construct even and odd nonlinear coherent states of a parametric oscillator and examine their nonclassical properties.It has been shown that these superpositions exhibit squeezing and photon antibunching which change with time.