1948/12/01 by L. T. Aldrich, A. O. Nier · 6 citations
Physics and Astronomy · Earth and Planetary Sciences · #Quantum, superfluid, helium dynamics #Atomic and Subatomic Physics Research #Geophysics and Gravity Measurements
paper · doi:10.1103/physrev.74.1590
openalex publication_date 1948/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/17
An investigation of the He3/He4 abundance ratio in helium extracted from the atmosphere, gas wells and a number of minerals has been made. Wide variations in this ratio are observed indicating that a more comprehensive program would be well worth while. He3 is observed in all sources of helium except radioactive minerals. This suggests the possibility of a primordial source as well as more recent sources for this isotope.