Deconvolution of alpha spectra from air filters applied for measurements of the short-lived radon progeny concentration

• Autorzy: Skubacz K.

Identyfikatory

DOI

10.1515/nuka-2017-0033

• Języki publikacji: EN

Abstrakty

EN

The paper contains a description of a method for the analysis of the complex alpha spectra generated during the measurement of the activity of filters outside of a vacuum chamber under environmental conditions. The peaks corresponding to the energies of alpha particles emitted by the specific isotopes are particularly large on the low-energy side of the peak maximum, and the energy resolution strongly depended on the applied filters. The analysis was based on the non-linear regression to a function designed for four, six and eight parameters. Satisfactory results were obtained for each of these functions, and the best-fitting results were achieved for the eight-parameter function. In addition, the uncertainties related to the estimated parameters, as well as the signals corresponding to functions that describe the shape of the energy peak, have been evaluated. There are also examples of the implementation of the method with respect to short-lived radon progeny and thoron decay products.

Słowa kluczowe

EN

alpha spectroscopy; ambient pressure; spectrum analysis; non-linear regression; radon progeny; thoron progeny

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2017
• Tom: Vol. 62, No. 3
• Strony: 229--234
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Skubacz K.

• Central Mining Institute, Silesian Centre for Environmental Radioactivity (BCR), Plac Gwarków 1, 40-166 Katowice, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Pöllänen, R., & Siiskonen, T. (2006). High-resolution alpha spectrometry under field conditions – fast identification of alpha particle emitting radionuclides from air samples. J. Env. Radioact., 87, 279–288.
• 2. Pöllänen, R., Peräjärvi, K., Siiskonen, T., & Turunen, J. (2013). In-situ alpha spectrometry from air fi lters at ambient air pressure. Radiat. Meas., 53/54, 65–70.
• 3. Kesten, J., Butterweck, G., Porstendörfer, J., & Reineking, A. (1992). An online alpha impactor for short-lived radon daughter. Aerosol Sci. Technol., 18, 156–164.
• 4. Porstendörfer, J., Zock, Ch., & Reineking, A. (2000). Aerosol size distribution of the radon progeny in outdoor air. J. Environ. Radioact., 51, 37–48.
• 5. Cheng, Y. S., Su, Y. F., Newton, G. J., & Yeh, H. C. (1992). Use of a graded diffusion battery in measuring the activity size distributions of thoron progeny. J. Aerosol Sci., 23(4), 361–372.
• 6. Reineking, A., Becker, K. H., & Porstendörfer, J. (1988). Measurements of the activity size distributions of the short-lived radon daughters in the indoor and outdoor environment. Radiat. Prot. Dosim., 24, 245–250.
• 7. Reineking, A., & Porstendörfer, J. (1986). Highvolume screen diffusion batteries and α-spectroscopy for measurement of the radon daughter activity size distributions in the daughter activity size distribution in the environment. J. Aerosol Sci., 17(5), 873–879.
• 8. Reineking, A., & Porstendörfer, J. (1990). Unattached fraction of short-lived Rn decay products in indoor and outdoor environments: an improved single-screen method and results. Health Phys., 58(6), 715–727.
• 9. Pöllänen, R., & Siiskonen, T. (2014). Unfolding alphaparticle energy spectrum from a membrane air filter containing radon progeny. Radiat. Meas., 70, 15–20.
• 10. Lin, Z., Berne, A., Cummings, B., Filliben, J. J., & Inn, K. G. (2002). Competence of alpha spectrometry analysis algorithms used to resolve the 241Am and 243Am alpha peak overlap. Appl. Radiat. Isot., 56, 57–63.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).