Detection limits for radioactivity counting

islanding detection methods for microgrids

امروزه استفاده از منابع انرژی پراکنده کاربرد وسیعی یافته است . اگر چه این منابع بسیاری از مشکلات شبکه را حل می کنند اما زیاد شدن آنها مسائل فراوانی برای سیستم قدرت به همراه دارد . استفاده از میکروشبکه راه حلی است که علاوه بر استفاده از مزایای منابع انرژی پراکنده برخی از مشکلات ایجاد شده توسط آنها را نیز منتفی می کند . همچنین میکروشبکه ها کیفیت برق و قابلیت اطمینان تامین انرژی مشترکان را افزایش ...

Limits for Counting and Compound Processes

1. Counting Processes and the Inverse Relation A counting process is defined in §2.1 of Ross, right at the beginning. It is a generalization of a renewal (counting) process, which in turn is a generalization of a Poisson (counting) process, typically denoted by {N(t) : t ≥ 0}. For a counting process, there are no specific stochastic (distributional) assumptions. The random variable N(t) counts ...

Radioactivity 6- Radiochemistry The Counting Room: Special Edition

programs. 1 General coincidence summing problems and specific coincidence summing problems encountered when measuring these two radionuclides on filter papers were discussed in the last issue? In order to perform accurate measurements of 134CS and 60Co in liquid samples using Marinelli beakers, coincidence summing effects should be investigated. Liquid samples of 134Cs and 60Co were prepared in...

Low Level Liquid Scintillation Counting of Radioactivity in Food Products

The production rate is 7.5 kg isotope C-14 yearly. The C-14 concentration stays approximately constant due to rapid mixing of the atmosphere, although the cosmic intensity is higher at the poles due to the deflection of charged cosmic particles along the magnetic field lines of the earth (corresponding to neutron intensities in the ratio 5:1 at the poles and the equator, respectively). Conseque...

Measurement of Environmental Radioactivity with Basic Counting Equipment