NEUTRON RESPONSE FUNCTION OF BONNER SPHERE SPECTROMETER WITH 6LiI(Eu) DETECTOR

Rasito Tursinah, Bunawas Bunawas, Jungho Kim

DOI: http://dx.doi.org/10.17146/gnd.2017.20.2.3319

Sari


Neutron Response Function of Bonner Sphere Spectrometer With 6LiI(Eu) Detector. The detector response function was needed to measure the neutron fluence based on the count rates from Bonner Sphere Spectrometer (BSS). The determination of response function of a BSS with 6LiI(Eu) detector has been performed using Monte Carlo MCNPX code. This calculation was performed for BSS using scintillation detector of 4 mm × 4 mm 6LiI(Eu) which is placed at the center of a set of polyethylene spheres i.e bare, 2", 3", 5", 8", 10", and 12" diameters. The BSS response functions were obtained for neutron energy of 1x10-9 MeV - 1x102  MeV in 111 energy bins and each value has an uncertainty less or equal to 2 %. The response function were compared with two response functions reported in the literature i.e IAEA document in Technical Reports Series 403 (TRS-403) and the calculation from Vega-Carrillo, et al. Also validated with measurement 252Cf neutron spectra, that shown the simulated BSS spectra were quite close to the experimental measured with a differrence of 3%.


Kata Kunci


Neutron response function, BSS, 6LiI(Eu) detector, MCNPX

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REFERENCES

[1] J. M. Ortiz-Rodríguez, A. Reyes Alfaro, A. Reyes Haro, J. M. Cervantes Viramontes, and H. R. Vega- Carrillo, “A neutron spectrum unfolding computer code based on artificial neural networks,” Radiat. Phys. Chem., vol. 95, pp. 428–431, 2014.

[2] T. Ogata, S. Kudo, Y. Watanabe, T. Muramatsu, H. Yamamoto, S. Iwai, S. Takagi, H. Harano, T. Matsumoto, and J. Nishiyama, “The calibration of bonner sphere spectrometer,” Radiat. Prot. Dosimetry, vol. 146, no. 1–3, pp. 107–110, 2011.

[3] A. Masuda, T. Matsumoto, H. Harano, J. Nishiyama, Y. Iwamoto, M. Hagiwara, D. Satoh, H. Iwase, H. Yashima, T. Nakamura, T. Sato, T. Itoga, Y. Nakane, H. Nakashima, Y. Sakamoto, C. Theis, E. Feldbaumer, L. Jaegerhofer, C. Pioch, V. Mares, A. Tamii, and K. Hatanaka, “Response measurement of a Bonner sphere spectrometer for high-energy neutrons,” IEEE Trans. Nucl. Sci., vol. 59, no. 1 PART 2, pp. 161–166, 2012.

[4] M. Marek and L. Viererbl, “Bonner sphere spectrometer for characterization of BNCT beam,” Appl. Radiat. Isot., vol. 69, no. 12, pp. 1918–1920, 2011.

[5] R. Bedogni, C. Domingo, K. Amgarou, M. De-San-Pedro, A. Esposito, A. Gentile, and A. Pola, “Spectrometry of 50 and 100 MeV quasi monochromatic neutron fields with extended range Bonner spheres,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 746, pp. 59–63, 2014.

[6] R. Bedogni, A. Esposito, A. Gentile, M. Angelone, and M. Pillon, “Comparing active and passive bonner sphere spectrometers in the 2.5 MeV quasi mono-energetic neutron field of the ENEA frascati neutron generator (FNG),” in Radiation Measurements, 2011, vol. 46, no. 12, pp. 1757–1760.

[7] S. Garny, V. Mares, H. Roos, F. M. Wagner, and W. Rühm, “Measurement of neutron spectra and neutron doses at the Munich FRM II therapy beam with Bonner spheres,” Radiat. Meas., vol. 46, no. 1, pp. 92–97, 2011.

[8] W. H. Chu, J. H. Lan, T. C. Chao, C. C. Lee, and C. J. Tung, “Neutron spectrometry and dosimetry around 15 MV linac,” in Radiation Measurements, 2011, vol. 46, no. 12, pp. 1741–1744.

[9] G. Medkour Ishak-Boushaki, K. Boukeffoussa, Z. Idiri, and M. Allab, “Thick activation detectors for neutron spectrometry using different unfolding methods: Sensitivity analysis and dose calculation,” Applied Radiation and Isotopes, vol. 70, no. 3. pp. 515–519, 2012.

[10] J. Cao, X. Jiang, C. Jiang, H. Cao, and Y. Zejie, “Calculation of Response Function for Bonner Sphere Spectrometer,” Plasma Sci. Technol., vol. 17, no. 1, pp. 2013–2016, 2015.

[11] International Atomic Energy Agency, Compendium of neutron spectra and detector responses for radiation Protection purposes, IAEA Technical Reports Series 403. Vienna, Austria: International Atomic Energy Agency, 2001.

[12] J. I. G. Hector R. Vega-Carrillo, I. Donaire, E. Gallego, E. Manzanares, A. Lorente, M.P. Iniguez, A. Martin, dan, “Calculation of response matrix of a BSS with 6LiI(Eu) scintillator,” Rev. Mex. Fis., vol. S 54(1), pp. 57–62, 2008.

[13] K. Nafisah and M. Rachid, “Neutron and Scintillator Gamma-ray Detection using a Cs2LiYCl6 Scintillator,” EPJ Web Conf., vol. 11018, pp. 4–7, 2014.

[14] S. Esteban, C. Fleta, T. Ino, and H. Otono, “Measurement of fast neutron detection efficiency with 6 Li and 7 Li enriched CLYC scintillators,” J. Phys. Conf. Ser., vol. 763, pp. 1–5, 2016.

[15] R. J. McConn, C. J. Gesh, R. T. Pagh, R. A. Rucker, and R. G. Williams, Compendium of Material Composition Data for Radiation Transport Modeling. 2011.

[16] W. R. C. Pioch, V. Mares, “Influence of Bonner sphere response functions above 20 MeV on unfoldedneutron spectra and doses,” Radiat. Meas., vol. 45(10), pp. 1263–1267, 2010.

[17] W. Rühm, V. Mares, C. Pioch, S. Agosteo, A. Endo, M. Ferrarini, I. Rakhno, S. Rollet, D. Satoh, and V. H, “Comparison of Bonner sphere responses calculated by different Monte Carlo codes at energies between 1 MeV and 1 GeV – Potential impact on neutron dosimetry at energies higher than 20 MeV,” Radiat. Meas., vol. 67, pp. 24–34, 2014.

[18] C. Pioch, V. Mares, E. . Vashenyuk, Y. . Balabin, and W. Rühm, “Measurement of cosmic ray neutrons with Bonner sphere spectrometer and neutron monitor at 79°N,” Nucl. Instruments Methods Phys. Res. Sect. A, vol. 626, pp. 51–57, 2011


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