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Title: | Neutron absorbed dose in a pacemaker CMOS |
Authors: | Borja Hernández, Candy Gretel Guzmán García, Karen Arlete Bañuelos Frías, Alan Paredes Gutiérrez, Lydia Hernández Dávila, Víctor Manuel Vega Carrillo, Héctor René |
Issue Date: | Jun-2012 |
Publisher: | Sociedad Mexicana de Física, A.C. |
Abstract: | El espectro y la dosis absorbida, debida a neutrones, por un Semiconductor de O´ xido Meta´lico Complementario ha sido estimada utilizando m´etodos Monte Carlo. Eventualmente, una persona con marcapasos se convierte en un paciente oncol´ogico que debe ser tratado en un acelerador lineal. El marcapasos contiene circuitos integrados como los CMOS que son sensibles a los campos de radiaci ´on intensos y pulsados. El haz terap´eutico de un LINAC operando a voltajes mayores a 7 MV est´a contaminado con fotoneutrones que pueden da˜nar el CMOS. En este trabajo se estim´o el espectro de neutrones y la dosis absorbida por un CMOS; adem´as, se calcularon los espectros de neutrones en dos detectores puntuales ubicados dentro de la sala. El espectro de neutrones en el CMOS tiene un pico entre 0.1 y 1 MeV y otro en la regi´on de los t´ermicos, conectados mediante neutrones epit´ermicos. Estas mismas caracter´ısticas se observan en los otros detectores. La dosis absorbida por el CMOS es 1:522 £ 10¡17 Gy por cada neutr´on emitido por el t´ermino fuente. |
Description: | The neutron spectrum and the absorbed dose in a Complementary Metal Oxide Semiconductor, has been estimated using Monte Carlo methods. Eventually a person with a pacemaker becomes an oncology patient that must be treated in a linear accelerator. Pacemaker has integrated circuits as CMOS that are sensitive to intense and pulsed radiation fields. Above 7 MV therapeutic beam is contaminated with photoneutrons that could damage the CMOS. Here, the neutron spectrum and the absorbed dose in a CMOS cell was calculated, also the spectra were calculated in two point-like detectors in the room. Neutron spectrum in the CMOS cell shows a small peak between 0.1 to 1 MeV and a larger peak in the thermal region, joined by epithermal neutrons, same features were observed in the point-like detectors. The absorbed dose in the CMOS was 1:522 £ 10¡17 Gy per neutron emitted by the source. |
URI: | http://localhost/xmlui/handle/20.500.11845/744 https://doi.org/10.48779/g4t4-c502 |
ISSN: | 0035-001X |
Other Identifiers: | info:eu-repo/semantics/publishedVersion |
Appears in Collections: | *Documentos Académicos*-- UA Ciencias Nucleares |
Files in This Item:
File | Description | Size | Format | |
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Neutron_absorbed_dose_in_a_pacemaker_CMOS.pdf | 155,62 kB | Adobe PDF | View/Open |
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