Home About us Editorial board Search Ahead of print Current issue Archives Submit article Instructions Subscribe Contacts Login 
Home Print this page Email this page Small font size Default font size Increase font size Users Online: 301
Year : 2017  |  Volume : 40  |  Issue : 2  |  Page : 90-94

Choosing an appropriate method for measurement of 232Th in environmental samples

1 Radiation safety Systems Division, Bhabha Atomic Research Centre, Trombay; Homi Bhabha National Institute, TSH Complex, Anushakti Nagar, Mumbai, India
2 Radiation safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India

Correspondence Address:
R S Sathyapria
Radiation Safety Systems Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai - 400 085, Maharashtra
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/rpe.RPE_20_17

Rights and Permissions

The article discusses the anomalies in using gamma spectrometry for the determination of 232Th in environmental samples against other methods. 232Th in environmental samples (soil, sediment, etc.,) is measured using several techniques, the most commonly used are gamma spectrometry, neutron activation analysis (NAA), and inductively coupled plasma-mass spectrometry. However, gamma spectrometry measurement is based on the assumption that 232Th is in secular equilibrium with its progenies, which is often not true, particularly in the case of vegetation and biological samples. Food samples collected from a high background radiation area in Tamil Nadu, India, were analyzed for 232Th by gamma spectrometry and NAA. This paper gives details of measurements and results obtained from both NAA and gamma spectrometry. 232Th activity concentration determined using gamma spectrometry was an order or two higher than those measured using NAA indicating an extreme overestimation of 232Th by gamma spectrometry technique.

Print this article     Email this article
Next article
Previous article
Table of Contents
Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
Citation Manager
Access Statistics
Reader Comments
Email Alert *
Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded233    
    Comments [Add]    
    Cited by others 4    

Recommend this journal