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Title: Spectra of photons and neutrons generated in a heterogeneous head of a 15 MV LINAC at differents field sizes

Abstract

Spectra of photons and neutrons were calculated, using the Monte Carlo code MCNP-5 using the e/p/n mode. A heterogeneous model was used to define the linac head where the collimators were modeled to produce five different treatment fields at the isocenter. Photon and neutron spectra were estimated in several points along two directions from the isocenter. The total photon fluence beyond 60 cm behaves according to 1/r{sup 2} rule, while total neutron fluence, beyond 80 cm, can be described by diffusion theory using an infinite plane as a neutron source.

Authors:
; ;  [1];  [2];  [2]
  1. Posgrado en CBAP, Universidad Autonoma de Nayarit, Carretera Tepic-Compostela km 9. C.P. 63780. Xalisco, Nayarit (Mexico)
  2. (Mexico)
Publication Date:
OSTI Identifier:
22075696
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1494; Journal Issue: 1; Conference: 12. Mexican symposium on medical physics, Oaxaca (Mexico), 16-19 Mar 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 62 RADIOLOGY AND NUCLEAR MEDICINE; BEAM PRODUCTION; COLLIMATORS; GAMMA SPECTRA; LINEAR ACCELERATORS; M CODES; MONTE CARLO METHOD; NEUTRON BEAMS; NEUTRON FLUENCE; NEUTRON SPECTRA; NEUTRONS; PHOTON BEAMS; PHOTONS; RADIOTHERAPY

Citation Formats

Benites-Rengifo, J. L., Vega-Carrillo, H. R., Velazquez-Fernandez, J. B., Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Apdo. Postal 336, 98000 Zacatecas, Zac., and Posgrado en CBAP, Universidad Autonoma de Nayarit, Carretera Tepic-Compostela km 9. C.P. 63780. Xalisco, Nayarit. Spectra of photons and neutrons generated in a heterogeneous head of a 15 MV LINAC at differents field sizes. United States: N. p., 2012. Web. doi:10.1063/1.4764585.
Benites-Rengifo, J. L., Vega-Carrillo, H. R., Velazquez-Fernandez, J. B., Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Apdo. Postal 336, 98000 Zacatecas, Zac., & Posgrado en CBAP, Universidad Autonoma de Nayarit, Carretera Tepic-Compostela km 9. C.P. 63780. Xalisco, Nayarit. Spectra of photons and neutrons generated in a heterogeneous head of a 15 MV LINAC at differents field sizes. United States. doi:10.1063/1.4764585.
Benites-Rengifo, J. L., Vega-Carrillo, H. R., Velazquez-Fernandez, J. B., Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Apdo. Postal 336, 98000 Zacatecas, Zac., and Posgrado en CBAP, Universidad Autonoma de Nayarit, Carretera Tepic-Compostela km 9. C.P. 63780. Xalisco, Nayarit. Tue . "Spectra of photons and neutrons generated in a heterogeneous head of a 15 MV LINAC at differents field sizes". United States. doi:10.1063/1.4764585.
@article{osti_22075696,
title = {Spectra of photons and neutrons generated in a heterogeneous head of a 15 MV LINAC at differents field sizes},
author = {Benites-Rengifo, J. L. and Vega-Carrillo, H. R. and Velazquez-Fernandez, J. B. and Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Apdo. Postal 336, 98000 Zacatecas, Zac. and Posgrado en CBAP, Universidad Autonoma de Nayarit, Carretera Tepic-Compostela km 9. C.P. 63780. Xalisco, Nayarit},
abstractNote = {Spectra of photons and neutrons were calculated, using the Monte Carlo code MCNP-5 using the e/p/n mode. A heterogeneous model was used to define the linac head where the collimators were modeled to produce five different treatment fields at the isocenter. Photon and neutron spectra were estimated in several points along two directions from the isocenter. The total photon fluence beyond 60 cm behaves according to 1/r{sup 2} rule, while total neutron fluence, beyond 80 cm, can be described by diffusion theory using an infinite plane as a neutron source.},
doi = {10.1063/1.4764585},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1494,
place = {United States},
year = {2012},
month = {10}
}