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- Operations Division purification of fission-product rare earths by ion exchange
- Separation of americium and promethium
- Preparation of fission rare-earth isotopes
- Purification of Pm¹⁴⁷ from fission-produced reare earths
- Purification of kilocurie quantities of promethium-147 by ion exchange
- Evidence of the absence of long-lived isotopes of promethium from fission of uranium, and the purification of promethium for the establishment of a primary spectrographic standard