ANGELOCCI, LUCAS V.SOUZA, CARLA D. dePANTELIS, EVAGGELOSNOGUEIRA, BEATRIZ R.ZEITUNI, CARLOS A.ROSTELATO, MARIA E.C.M.2021-06-302021-06-302021ANGELOCCI, LUCAS V.; SOUZA, CARLA D. de; PANTELIS, EVAGGELOS; NOGUEIRA, BEATRIZ R.; ZEITUNI, CARLOS A.; ROSTELATO, MARIA E.C.M. Monte Carlo simulation to assess free space and end-weld thickness variation effects on dose rate for a new Ir-192 brachytherapy source. <b>Applied Radiation and Isotopes</b>, v. 173, p. 1-6, 2021. DOI: <a href="https://dx.doi.org/10.1016/j.apradiso.2021.109709">10.1016/j.apradiso.2021.109709</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/32000.0969-8043http://repositorio.ipen.br/handle/123456789/32000A new Iridium-192 seed for brachytherapy is under development. Specific dose rate contribution by two different factors were evaluated: the effect from movement of the core in the free space within the seed and the effect of the end-weld thickness variation. Both were investigated through use of the Monte Carlo radiation transport code MCNP6 and an in-house routine programmed with MATLAB. Differences greater than 15% compared to results from the nominal seed were found near the source, indicating a significant dose variation.1-6openAccesscalculation methodsmonte carlo methodbrachytherapyiridium 192seedsdosimetrysource termsdose ratesArtigo de periódico17310.1016/j.apradiso.2021.1097090000-0003-2943-60970000-0002-7303-67200000-0003-4609-2281https://orcid.org/0000-0003-2943-6097https://orcid.org/0000-0002-7303-6720http://orcid.org/0000-0003-1335-886436.1245.00