POLO, IVON O.SANTOS, WILLIAM S.ANTONIO, PATRICIA de L.CALDAS, LINDA V.E.2017-09-272017-09-272017POLO, IVON O.; SANTOS, WILLIAM S.; ANTONIO, PATRICIA de L.; CALDAS, LINDA V.E. Variance reduction technique in a beta radiation beam using an extrapolation chamber. <b>Applied Radiation and Isotopes</b>, v. 128, p. 154-157, 2017. DOI: <a href="https://dx.doi.org/10.1016/j.apradiso.2017.06.017">10.1016/j.apradiso.2017.06.017</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27797.0969-8043http://repositorio.ipen.br/handle/123456789/27797This paper aims to show how the variance reduction technique “Geometry splitting/Russian roulette” improves the statistical error and reduces uncertainties in the determination of the absorbed dose rate in tissue using an extrapolation chamber for beta radiation. The results show that the use of this technique can increase the number of events in the chamber cavity leading to a closer approximation of simulation result with the physical problem. There was a good agreement among the experimental measurements, the certificate of manufacture and the simulation results of the absorbed dose rate values and uncertainties. The absorbed dose rate variation coefficient using the variance reduction technique “Geometry splitting/Russian roulette” was 2.85%.154-157openAccessabsorbed radiation dosesdose ratesextrapolation chambersmonte carlo methodradiation sourcesArtigo de periódico12810.1016/j.apradiso.2017.06.017https://orcid.org/0000-0002-7362-245531.52