SOME PROBLEMS CONCERNING THE MIGRATION AND DISTRIBUTION OF HELIUM-4 AND RADON-222 IN THE UPPER SEDIMENTS OF THE CRUST - A THEORETICAL MODEL; AND THE DEVELOPMENT OF A QUADRUPOLE ION FILTER FOR MEASURING HELIUM AT THE SOIL-AIR INTERFACE
The generation, distribution, and migration process of helium-4 and radon-222 in the upper lithosphere and their fluxes at the soil-air interface were extensively reviewed. Global baseline concentration values were obtained calculated from more than 11,000 natural gas analyses of helium and 1,600 fo...
| Main Author: | |
|---|---|
| Format: | Others |
| Language: | English |
| Published: |
2007
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1911/15577 |