The present paper deals with the solid state etch-track detectors and their applications to the detection/dosimetry of neutrons, radon, and radon-decay products. Most of the scientists, actively engaged in the late 60’s and in the 70’s for monitoring the occupational neutron-exposure by etch-track detectors, became also involved in the development of personal monitors for the exposure to radon-...

This study assesses the indoor radon and its progeny in some dwelling in Moradabad of Western Uttar Pradesh by using LR-115 plastic track detector. The measurements were made in 66 residential houses from January 2012 to December 2012 hanging twin cup radon dosimeter at a height of 1.5-2.0 m from ground level. The twin cup radon dosimeter can record the values of radon, and its decay products s...

The results of the analysis of data taken in the continuation of a previously reported search1 for highly ionizing particles at PEP are presented. These data were taken in the period from October 1981 to June 1983. Assemblies consisting of Lexan and CR-39 plastic track detectors were exposed in two runs to integrated luminosities of 30 X 1O36 cm-2 and 150 X 10% crnw2% The search was sensitive t...

Proton acceleration experiments by irradiation of intense ultra-violet lasers with thin foil targets were conducted. Energies and efficiencies of the accelerated protons were investigated over the target thickness from several mm to 50 nm using various materials. In order to irradiate the very thin foil targets, the discharge pre-amplifier in the previous system was removed to reduce amplified ...

A computer program named TRIAC written in MATLAB has been developed for track recognition and track parameters measurements from images of the Solid State Nuclear Track Detectors CR39. The program using image analysis tools counts the number of tracks for dosimetry proposes and classifies the tracks according to their radii for the spectrometry of alpha-particles. Comparison of manual scanning ...

The effect of pre-gamma irradiation on track density, bulk etch rate and light absorbance in CR-39 was investigated. CR-39 detectors were irradiated with gamma doses over a range of 0 to 280 kGy (0 to 28 Mrad). The detectors were overlaid with 0.77 mm of polyethylene and exposed to a known fluence of 252Cf spontaneous fission neutrons. All detectors were then etched in 6.25N sodium hydroxide so...

The nematode Caenorhabditis elegans was exposed to natural space radiation using the ESA Biorack facility aboard Spacelab on International Microgravity Laboratory 1, STS-42. For the major experimental objective dormant animals were suspended in buffer or on agar or immobilized next to CR-39 plastic nuclear track detectors to correlate fluence of HZE particles with genetic events. This configu...

Radon concentrations were measured with long-term alpha-track radon detectors along with radon scout. Radon gas emanates from the radium content of terrestrial products, like tobacco leaves. Smoking materials contain, beside tobacco, many other additives that may also contain radium traces. These additives aim at exciting smoker’s feeling via chemical reactions, which may be disrupted by alpha ...

The (CR–LR) difference technique, based on the CR-39 and LR 115 detectors, for the determination of implanted Po in glass after deposition of short-lived radon progeny, was analyzed in details in this paper. The sensitivities of both detectors were calculated using the Monte Carlo method with V functions particularly derived in our previous works for the detectors used in the present experiment...