Determination of Neutron Spectrum at LINAC Using a Passive Single Sphere Spectrometer

Muhammad Helmi Hakim, Chomsin Sulistya Widodo, Bunawas Bunawas, Rasito Rasito

Abstract


Neutron spectra at Linear Acceleration (LINAC) facility was needed to protect neutron radiation. The purpose of determination of neutron spectra at LINAC using Passive Single Sphere Spectrometer is getting spectra and neutron fluence from LINAC and knowing the influence of input voltage at LINAC to its spectra and neutron fluence output. Single Sphere Spectrometer (SSS) with diameters 30 cm using seven gold foil detectors was set in position a half of diameter (0, 3, 6, 9, 11, 12, 13 cm) from center of the SSS. Measurement of neutron count rate was performed by placing SSS under gantry of LINAC with SSD 100 cm in distances. Next, neutron count rate was used as input data in UMG 3.3 program to get spectra. Based on measurement, total of neutron fluence at LINAC 10 MV and 15 MV is 5,78 ´ 104 n/cm2.s ± 0,01 ´ 104and 9,44 ´ 105 n/cm2.s ± 0,22 ´ 105, so increasing input voltage at LINAC was followed by increased neutron fluence.


Keywords


Faloak extract; Pb; tilapia egg; membrane potential

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References


Allardice, A. (2014), Neutron Production and Transport at a Medical Linear Accelerator, Thesis, Department of Environmental and Radiological Health Sciences, Colorado State University Colorado.

Barquero, R., R. Mendez, H. R. Vega-Carrillo, M. P. I. Iguez and T. M. Edwards (2005), Neutron Spectra and Dosimetric Features around an 18 Mv Linac Accelerator, Health Physics. 88(1): 48-58.

Ovalle, S.A.M. (2013), Neutron Dose Equivalent in Tissue Due to Linacs of Clinical Use, InTech, Rijeka, Croatia.

Hyne (2014), Resume of Non Technical Guide to Petroleum Geology. Vol 7.

Futse, M.J.G., C. Domingo and K. Amgarau (2010), Neutron Spectrometry in Complex N-Y Fields: Application to Linac and Pet Facilities, Thesis, Facultat de Ciencies, Universitat Autònoma de Barcelona, Spain.

Panjeh, H., R.I. Najafabadi, M. Abbasi and J. Kettler (2012), Direct Simulation Monte Carlo Code for Time Dependent Foil Activation Measurements, International Journal of Science and Advanced Technology. 3(12): 1-8.

Knoll, G.F. (2010), Radiation Detection and Measurement. Fourth edition, John Wiley & Sons, Inc. Hoboken, USA.

Chen, K.L., E.E. Klein, S.K. Loyalka and W.H. Miller. (2011), Neutron Exposure from Electron Linear Accelerators and a Proton Accelerator: Measurements and Simulations. Dissertation, Faculty of the Graduate School, University of Missouri, Columbia.

Reginatto, M. (2004), UMG Package. Version 3.3. Nuclear Agency Energy. Boulogne-Billancourt, France.

Turner, J. E. (2007), Atoms, Radiation, and Radiation Protection. 3rd, Completely Revised and Enlarged Edition, Wiley-VCH. Weinheim, Germany.

Domingo, C., M. J. Garcia-Futse, E. Morales, K. Amgarau, J. A. Terron, J. Rosello, L. Brualla, L. Nunez, R. Colmenares, F. Gomez, G. H. Hartman, F. Sanchez-Doblado and F. Fernandez (2010), Neutron Spectrometry and Determination of Neutron Ambient Dose Equivalents in Different Linac Radiotherapy Rooms, Radiation Measurements, 45(10): 1391–1397.

NCRP (1984), Neutron Contamination from Medical Electron Accelerator, Report No.079, Bethesda, USA.




DOI: http://dx.doi.org/10.21776/ub.natural-b.2016.003.04.7

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