Self-absorption correction and efficiency calibration for radioactivity measurement of environmental samples by gamma-ray spectrometry

• Autorzy: Misiak R. , Hajduk R. , Stobiński M. , Bartyzel M. , Szarłowicz K. , Kubica B.
• Języki publikacji: EN

Abstrakty

EN

In this work empirical functions which relate the full-energy peak efficiency with sample height, energy, matrix composition and bulk density for voluminal samples in a cylindrical counting geometry were found. Accurate determination of the radioactivity of gamma-emitting radionuclides in environmental samples requires taking into account self-absorption. For the obtained self-absorption correction factor, a direct transmission method was chosen. Finally, this paper proposes a simple correlation between the self-absorption correction factor and the bulk density and height of the measured sample for a given energy.

Słowa kluczowe

EN

gamma spectrometry; efficiency calibration; self-absorption; environmental

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2011
• Tom: Vol. 56, No. 1
• Strony: 23--28
• Opis fizyczny: Bibliogr. 30 poz., rys.

Twórcy

autor

Misiak R.

autor

Hajduk R.

autor

Stobiński M.

autor

Bartyzel M.

autor

Szarłowicz K.

autor

Kubica B.

• Division of Applications of Physics and Interdisciplinary Research, The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Álvarez-Iglesias P, Quintana B, Rubio B, Pérez-Arlucea M (2007) Sedimentation rates and trace metal input history in intertidal sediments from San Simón Bay (Ría de Vigo, NW Spain) derived from 210Pb and 137Cs chronology. J Environ Radioactiv 98:229–250
• 2. Bolivar JP, Garcia-Leon M, Garcia-Tenorio R (1997) On self-attenuation corrections in gamma-ray spectrometry. Appl Radiat Isot 48:1125–1126
• 3. Bolivar JP, Garcia-Tenorio R, Garcia-Leon M (1994) A generalized transmission method for gamma-efficiency determination in soil samples. Nucl Geophys 8:485–492
• 4. Bolivar JP, Garcia-Tenorio R, Garcia-Leon M (1996) A method for the determination of counting efficiencies in γ-spectrometric measurements with HPGe detectors. Nucl Instrum Methods Phys Res A 382:495–502
• 5. Boshkova T, Minev L (2001) Corrections for self-attenuation in gamma-ray spectrometry of bulk samples. Appl Radiat Isot 54:777–783
• 6. Custhall NH, Larsen IL, Olsen CR (1983) Direct analysis of 210Pb in sediment samples: self-absorption correction. Nucl Instrum Methods Phys Res 206:309–312
• 7. Daza MJ, Quintana B, Garcia-Talavera M, Fernandez F (2001) Efficiency calibration of an HPGe detector in the [46.54–2000] keV energy range for the measurement of environmental samples. Nucl Instrum Methods Phys Res A 470:520–532
• 8. Galloway RB (1991) Correction for sample self-absorption in activity determination by gamma spectrometry. Nucl Instrum Methods Phys Res A 300:367–373
• 9. Garcia-Talavera M, Pena V (2004) A hybrid method to compute accurate efficiencies for volume samples in γ-ray spectrometry. Appl Radiat Isot 60:227–232
• 10. Gelen A, Soto J, Gómez J, Díaz O (2004) Sediment dating of Santander Bay, Spain. J Radioanal Nucl Chem 261:437–441
• 11. Haase G, Tait D, Wiechen A (1993) Application of a new Monte Carlo method for determination of summation and self-attenuation corrections in gamma spectrometry. Nucl Instrum Methods Phys Res A 336:206–214
• 12. Harb S (2007) Measurement of the radioactivity of 238U, 226Ra, 210Pb, 228Th, 232Th, 228Ra, 137Cs and 40K in tea using gamma-spectrometry. J Radioanal Nucl Chem 274:63–66
• 13. Helmer RG, Nica N, Hardy JC, Iacob VE (2004) Precise efficiency calibration of an HPGe detector up to 3.5 MeV, with measurements and Monte Carlo calculations. Appl Radiat Isot 60:173–177
• 14. Hernandez F, El-Daoushy F (2002) Semi-empirical method for self-absorption correction of photons with energies as low as 10 keV in environmental samples. Nucl Instrum Methods Phys Res A 484:625–641
• 15. Jodłowski P (2006) Self-absorption correction in gamma-ray spectrometry of environmental samples – an overview of methods and correction values obtained for the selected geometries. Nukleonika 51;S2:S21–S25
• 16. Joshi SR (1989) Determination of 241Am in sediments by direct counting of low-energy photons. Int J Appl Radiat Instrum, Part A, Appl Radiat Isot 40:691–699
• 17. Landsberger S, Mann C (2003) Determination and correlation of 137Cs and unsupported 210Pb activities in soil. J Radioanal Nucl Chem 258:55–57
• 18. McMahon CA, Fegan MF, Wong J, Long SC, Ryan TP, Colgan PA (2004) Determination of self-absorption corrections for gamma analysis of environmental samples: comparing gamma-absorption curves and spiked matrix-matched samples. Appl Radiat Isot 60:571–577
• 19. Melquiades FL, Appoloni CR (2001) Self-absorption correction for gamma spectrometry of powdered milk samples using Marinelli beaker. Appl Radiat Isot 55:697–700
• 20. Mostajaboddavati M, Hassanzadeh S, Faghihian H, Abdi MR, Kamali M (2006) Efficiency calibration and mea-surement of self-absorption correction for environmental gamma-spectroscopy of soil samples using Marinelli beaker. J Radioanal Nucl Chem 268:539–544
• 21. Park TS, Jeon WJ (1995) Measurement of radioactive samples in Marinelli beakers by gamma-ray spectrometry. J Radioanal Nucl Chem, Articles 193:133–144
• 22. Perez-Moreno JP, San Miguel EG, Bolivar JP, Aguado JL (2002) A comprehensive calibration method of Ge detectors for low-level gamma-spectrometry measurements. Nucl Instrum Methods Phys Res A 491:152–162
• 23. Presler O, German U, Pelled O, Alfassi ZB (2004) The validity of the virtual point detector concept for absorbing media. Appl Radiat Isot 60:213–216
• 24. Quindos LS, Sainz C, Fuente I, Quindos L, Arteche J (2006) Correction by self-attenuation in gamma-ray spectrometry for environmental samples. J Radioanal Nucl Chem 270:339–343
• 25. Ramos-Lerate I, Barrera M, Ligero RA, Casa-Ruiz M (1998) A new method for gamma-efficiency calibration of voluminal samples in cylindrical geometry. J Environ Radioactiv 38:47–57
• 26. Rekha AK, Dingankar MV, Anilkumar S, Narayani K, Sharma DN (2006) Determination of the activity ratios of 231Pa to 235U and 227Th to 235U in ore samples using gamma-spectrometry. J Radioanal Nucl Chem 268:453–460
• 27. Ruiz-Fernández AC, Páez-Osuna F, Machain-Castillo ML, Arellano-Torres E (2004) 210Pb geochronology and trace metal fluxes (Cd, Cu and Pb) in the Gulf of Tehuantepec, South Pacific of Mexico. J Environ Radioactiv 76:161–175
• 28. Sanchez F, Navarro E, Ferrero JL et al. (1991) A Monte Carlo based method of including gamma self-absorption for the analysis of environmental samples. Nucl Instrum Method Phys Res B 61:535–540
• 29. San Miguel EG, Bolivar JP, García-Tenorio R (2004) Vertical distribution of Th-isotope ratios, 210Pb, 226Ra and 137Cs in sediment cores from an estuary affected by anthropogenic releases. Sci Total Environ 318:143–157
• 30.Vargas MJ, Timon AF, Diaz NC, Sanchez DP (2002) Monte Carlo simulation of the self-absorption corrections for natural samples in gamma-ray spectrometry. Appl Radiat Isot 57:893–898