Efficiency calculation of proton recoil neutron telescope with relativistic correction for neutron energy 4 to 20 MeV.

The efficiencies of a proton recoil neutron telescope for neutron energies ranging from 4 MeV to 20 MeV were calculated for different geometries given by Bame et al., for the case of an isotropic point neutron source colinear with the radiator and charge particle detector that are parallel & coaxial to each other. An analytical expression for the efficiency was obtained as a function of the radiator size, detector aperture, source-radiator & radiator-detector distances and n-p differential scattering cross section.

ABSOLUTE MEASUREMENT OF 14.57 MeV NEUTRON FLUENCE RATE USING PROTON RECOIL NEUTRON TELESCOPE.

A single stage vacuum-type proton recoil neutron telescope (PRT) was used for accurate measurement of 14.57 MeV neutron fluence rate from an indigenously developed D-T neutron generator at Purnima, BARC. The telescope consists of a polyethylene radiator having 4 cm diameter and CsI (Tl) scintillation crystal having thickness 1.

Vertical Scar Reduction Mammaplasty.

Since 1989, the authors have performed vertical scar reduction mammaplasty on over 3000 patients. In 2006, the authors described their technique. Since then, the authors have made several modifications that they believe have improved both the reliability of the procedure and the outcomes that they are able to achieve.

The Safety of Aesthetic Labiaplasty: A Plastic Surgery Experience.

Background: The demand for female aesthetic labiaplasty surgery continues to rapidly increase. Several questions have been raised regarding the safety and effectiveness of female aesthetic genital surgery.

Objectives: The purpose of this study is to review our experience with aesthetic labiaplasty and describe the type and frequency of complications that have been experienced.

Study of neutron spectra emitted by moderated 241Am-Be source for various moderating materials by using simulation technique.

A study was done on the tailored neutron energy spectra of (241)Am-Be neutron source due to the effect of moderators. The (241)Am-Be laboratory neutron source was used as the basic source and the emitted spectrum was modified using various neutron moderators. The various moderators used are high-density polythene, light water, heavy water, graphite, (56)Fe, BeO, Be, (6)Li and (7)Li.

Standardisation of water-moderated 241Am-Be neutron source using De Pangher neutron long counter: experimental and Monte Carlo modelling.

A convenient neutron source is made for calibration of neutron survey instruments and personal dosimeters that are used in various nuclear installations such as fuel reprocessing, waste management, fuel fabrication and oil and well logging facilities, etc. This source consists of a bare (241)Am-Be neutron source placed at the centre of a 15-cm radius stainless steel spherical shell filled with distilled water. This paper describes the standardisation of the source at Bhabha Atomic Research Centre, using De Pangher neutron long counter both experimentally and using the Monte Carlo simulation.