Related Experiment Video
Updated: Aug 11, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
Published on: April 12, 2017
Radium content in ground water from a granitic batholith of the metamorphic basement, eastern São Paulo State, Brazil
Fábio de Oliveira Lucas1, Fernando Brenha Ribeiro
1Departamento de Geofísica do Instituto de Astronomia, Geofísica e Ciências Atmosféricas da Universidade de São Paulo, Rua do Matão, 1226, 05508-090 São Paulo, SP, Brazil.
Abstract:
The radon emanation method was applied to measure the activity of 226Ra, dissolved and associated with suspended solids, in the ground waters from two wells drilled in the Morungaba Batholith fractured granites, intruded in the metamorphic basement, eastern border of the Paraná basin in São Paulo State, Brazil. The water samples were collected from March 2003,to April 2004, with a time interval of about one month between sampling campaigns. The mean observed dissolved 226Ra activity concentrations in the two wells were 47.9 +/- 7.1 and 51.6 +/- 8.8 mBq/L. No systematic time dependence of the 226Ra activity concentration was clearly identified. The activity of 226Ra associated with suspended solids contained in 1L of ground water fell, during the sampling period, from 13 +/- 1 to 0.8 +/- 0.1 mBq in one well and from 4.9 +/- 0.3 to 0.6 +/- 0.1 mBq in the second well.
More Related Videos
Related Concept Videos
Radioactive Decay and Radiometric Dating
Radioactivity and Nuclear Equations
A nuclide of an element has a specific number of protons and...
Radiation: Applications
The average...
Ionic Radii
Radiation Pressure: Problem Solving
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...
Radical Halogenation: Thermodynamics

