A proposal to design a new high volume standard air filter for efficiency calibration of HPGe detector

The study of the different pollutants present in atmospheric aerosols such as trace elements and radionuclides is essential to assess the air quality. To analyze the particulate matter (PM), atmospheric filters with different dimensions and geometries (rectangular, circular, slotted, and square filters) are usually employed. Regarding the pollutants existing in atmospheric aerosols, radionuclides are usually analyzed due to their multiple applications such as either in the environmental radiological control or as tracers of atmospheric processes. Therefore, this study aims to develop a new and general methodology to calibrate in efficiency coaxial Ge detectors to properly determine radionuclides present in the PM by gamma-ray spectrometry for several filter types. For this, granular certified reference materials (CRM) containing only natural radionuclides (238U-series, 232Th-series, and 40 K) were selected. Several granular solid CRMs were chosen allowing us to reproduce the same PM deposition geometry and to assure the homogeneity of the added CRMs. These are the main advantages in relation to the typical methods that use liquid CRMs. Furthermore, for filters whose surfaces are relatively large, they were cut in several pieces and placed one on top of the other, achieving the same geometry than the PM deposited onto the filter. Then, the experimental full-energy peak efficiencies (FEPEs) were obtained for each energy of interest (Eγ) and they were fitted versus Eγ, finding a general FEPE function for each filter type. Finally, this methodology was validated for both natural and artificial radionuclides (from 46 to 1332 keV) by using different filter types employed in proficiency test exercises, obtaining |zscore|< 2 for all cases.

show abstract

A new efficiency calibration methodology for different atmospheric filter geometries by using coaxial Ge detectors

Barba-Lobo

Bolı́var

2023

Air Qual Atmos Health

View full text Add to dashboard Cite

show abstract

List mode data acquisition technique for Compton suppression and minimum detectable activity (MDA) reduction in standard high-volume air samples

Tourang

Hadadi

Allaf

et al. 2022

Radiation Physics and Chemistry

View full text Add to dashboard Cite

More accurate suppression of compton continuum based on list mode data acquisition technique

Moshkbar-Bakhshayesh,

Mohtashami,

Tourang

et al. 2024

Radiation Physics and Chemistry

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

A proposal to design a new high volume standard air filter for efficiency calibration of HPGe detector

Cited by 3 publications

References 11 publications

A new efficiency calibration methodology for different atmospheric filter geometries by using coaxial Ge detectors

A new efficiency calibration methodology for different atmospheric filter geometries by using coaxial Ge detectors

List mode data acquisition technique for Compton suppression and minimum detectable activity (MDA) reduction in standard high-volume air samples

More accurate suppression of compton continuum based on list mode data acquisition technique

Contact Info

Product

Resources

About