alexa Measurements of atmospheric 7Be properties using high-efficiency gamma spectroscopy.
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Yu KN, Lee LY

Abstract Share this page

Abstract Two 7Be-related properties have been measured using a high-efficiency germanium gamma spectrometer (relative efficiency of 90\%), namely, the activity median aerodynamic diameter (AMAD) of 7Be-associated atmospheric aerosols and the airborne 7Be radioactivity. With time resolutions of about 1-3d correlations between these 7Be-related properties and different meteorological parameters were identified. We found that AMAD is anti-correlated to 7Be counts. It is correlated with the relative humidity (RH) and mean cloud cover with high confidence, but not with temperature. We also found that 7Be radioactivity was correlated with the RH with a moderate confidence, but not with the mean cloud cover or temperature. Furthermore, wet precipitation present in the middle of the sampling period decreased the 7Be activity and increased the AMAD, while wet precipitation before or at the beginning of the sampling period decreased both 7Be activity and AMAD. Finally, after a cold front passed by, the AMAD decreased and the 7Be activity increased. Possible explanations are also given.
This article was published in Appl Radiat Isot and referenced in Journal of Analytical & Bioanalytical Techniques

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords