DEVELOPMENT OF ISOTOPICALLY ENRICHED BORON-DOPED ALUMINA DOSIMETER FOR THERMAL NEUTRONS

Radiation Protection Dosimetry
Fuminobu SatoIsao Murata

Abstract

A novel optically stimulated luminescence (OSL) detector containing isotopically enriched boron was developed for thermal neutron dosimetry. Alumina containing isotopically enriched boron (Al2O3:B) was synthesised by the sol-gel method. The Al2O3:B was annealed up to ~1800 K. For X-ray diffractometer (XRD) analysis, the diffraction pattern of the Al2O3:B had reflex peaks corresponding to α-Al2O3. The sensitivity of Al2O3:B to photons was slightly 2% of that of a commercial Al2O3:C. The Al2O3:B detector had satisfactory linearity in X-ray dose measurement. A thermal neutron field was constructed using a 241Am-Be neutron source and graphite blocks. A pair of Al2O3:10B and Al2O3:11B detectors were set in the thermal neutron field. The response of Al2O3:10B was larger than that of Al2O3:11B owing to the 10B(n,α)7Li reactions. The sensitivity of Al2O3:10B to thermal neutrons was estimated to be two orders less than the photon sensitivity. Therefore, the pair of Al2O3:10B and Al2O3:11B detectors were useful for thermal neutron dosimetry.

References

Jun 2, 2001·Science·UNKNOWN Governing Council of the Organization for Human Brain
Sep 9, 2004·Radiation Protection Dosimetry·Francesco d'Errico, Adrie J J Bos
Apr 6, 2006·Radiation Protection Dosimetry·Eduardo G Yukihara, Stephen W S McKeever
Jun 1, 2006·Radiation Protection Dosimetry·M Sommer, J Henniger
Oct 21, 2010·Radiation Protection Dosimetry·C Passmore, M Kirr
Jan 13, 2011·Radiation Protection Dosimetry·Daisuke MakiToshiyuki Iida
Dec 19, 2014·Radiation Protection Dosimetry·Kenta TakadaAkira Matsumura
Sep 24, 2015·Radiation Protection Dosimetry·M Hajek, R Cruz Suárez

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