en Radiation Biology Radiation Biology تحقيق بديع Original Research <p><strong>Background:</strong> In high-intensity, mixed and pulsed neutron fields the use of spectrometers or area monitors with active detectors is useless in these conditions neutron measuring devices must have a passive detector. Here a passive neutron area monitor with CR39 track detector was designed and the response was calculated. <strong>Materials and Methods:</strong> The response of a passive neutron area monitor with CR39 track detector has been calculated with the MCNPX code. To increase the detection efficiency a 10B converter was included. The response was calculated using 47 monoenergetic neutron sources. <strong>Results:</strong> A passive neutron area monitor using a CR39 with 10B converter was designed where fluence and H*(10) responses were calculated. <strong>Conclusion:</strong> The shape of the responses is similar to responses reported for neutron monitors with active detectors.</p> Neutron dosimetry, passive detector, CR-39, Monte Carlo, response. 149 153 http://ijrr.com/browse.php?a_code=A-10-1-466&slc_lang=en&sid=1 H.R. Vega-Carrillo fermineutron@yahoo.com 790031947532846007494 790031947532846007494 Yes Unidad Académica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Zacatecas, Zac. México R. Barquero 790031947532846007495 790031947532846007495 No Departamento de Radiología del Hospital Universitario Rio Hortega, Valladolid, Spain G.A. Mercado 790031947532846007496 790031947532846007496 No Unidad Academica de Matematicas Universidad Autónoma de Zacatecas, Zacatecas, Zac. México