FROM an examination of the hyperfine structure of certain lines of the arc spectrum of iridium, Prof. B. Venkatesachar and L. Sibaiya 1 have recently concluded that iridium must have two isotopes, and ...
This week marked the World Day to Combat Desertification and Drought, highlighting the importance of accelerating progress to restore 1.5 billion hectares of degraded land around the world. The IAEA ...
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