A beam telescope consisting of four double sided, DC coupled microstrip detectors with VLSI readout electronics has been built and tested in a 70 GeV ? beam at CERN. A signal to noise ratio of 53:1 and a spatial resolution of 2.7m (junction side) and 4.8m (ohmic side) have been observed on the best detectors. A telescope performance for a particle track of xy = 2 ? 3 m and slope = 2 ? 3 rad on ...

We present a sudy of the interactions of Q-balls with matter, and their energy losses in the earth, for a large range of velocities. These calculations are used to compute the fractional geometrical acceptance of underground detectors. Furthermore we computed the light yield in liquid scintillators, the ionization in streamer tubes and the Restricted Energy Loss in nuclear track detectors. Invi...

Amount of pollution radiation in foodstuffs and feedstuffs are very necessary to measure because it is a direct contact with human animal health. Therefore, the present investigation useful for health environmental data base. The study included measurement effective radium-226 content (CRa) some chosen samples vegetables fruits (local imported) Najaf governorate. CRa were measured using Solid S...

Equations for calculating track parameters have been proposed, which invariably involve the track etch rate Vt and the bulk etch rate Vb. The present study measured Vb for the LR115 solid-state nuclear track detector using atomic force microscopy (AFM). The detectors were partially masked using rubber cement and then etched in 2:5 N NaOH solution at 60◦C for time periods ranging from 5 to 40 mi...

in a detection network, the final decision is made by fusing the decisions from local detectors. the objective of that decision is to minimize the final error probability. to implement and optimal fusion rule, the performance of each detector, i.e. its probability of false alarm and its probability of missed detection as well as the a priori probabilities of the hypotheses, must be known. howev...

background: separate radon and thoron measurements in soil are very important in assessment of internal exposure due to inhalation of such radioactive gases. materials and methods: in this study, a low cost, small size, passive diffusion chamber has been developed for simple measurement of radon-222 and radon-220(thoron) gases separately in soil. the diffusion chamber consists of two films and ...