Neutron Spectra in a 15 MV LINAC

Journal Article · Tue Dec 07 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3531596· OSTI ID:21506971

Vega-Carrillo, H R ^[1]; Chu, Wei-Han ^[2]; Tung, Chuan-Jong ^[3]; Lan, Jen-Hong ^[4]

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1. Unidad Academica de Estudios Nucleares de la Universidad Autonoma de Zacatecas. Apdo. Postal 336, 98000 Zacatecas, Zac. (Mexico)
2. National Tsing Hua University, Hsinchu, Taiwan (China)
3. Chan Gung University, Taiwan (China)
4. Chan Gung Memorial Hospital-Kaohsiung Medical Center and National Kaohsiung University, Kaohsiung, Taiwan (China)

Neutron spectra were calculated inside the treatment hall of a 15 MV LINAC, calculations were carried out using Monte Carlo methods. With a Bonner sphere spectrometer with pairs of thermoluminiscent dosimeters the neutron spectrum at 100 cm from the isocenter was measured and compared with the calculated spectrum. All the spectra in the treatment hall show the presence of evaporation and knock-on neutrons; also the room-return due to the hall features is shown. In the maze the large contribution are due to epithermal and thermal neutrons. A good agreement between the calculated and measured spectrum at 100 cm was noticed, from this comparison the differences are attributed to the water content in the concrete of the hall.

• OSTI ID: 21506971
• Journal Information: AIP Conference Proceedings, Vol. 1310, Issue 1; Conference: 11. Mexican symposium on medical physics, Mexico City (Mexico), 19-22 Mar 2010; Other Information: DOI: 10.1063/1.3531596; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BONNER SPHERE SPECTROMETERS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
DOSEMETERS
EVAPORATION
KNOCK-ON
LINEAR ACCELERATORS
MONTE CARLO METHOD
NEUTRON SPECTRA
THERMAL NEUTRONS
THERMOLUMINESCENCE
ACCELERATORS
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
EMISSION
EVALUATION
FERMIONS
HADRONS
LUMINESCENCE
MEASURING INSTRUMENTS
NEUTRON SPECTROMETERS
NEUTRONS
NUCLEONS
PHASE TRANSFORMATIONS
PHOTON EMISSION
SIMULATION
SPECTRA
SPECTROMETERS