Search for Interstellar Beacons at the 3He+ Hyperfine Transition Frequency

Observers
BANIA
ROOD
Reference
BANIA, T.M and ROOD, R.T., "Search for Interstellar Beacons at the 3He+ Hyperfine Transition Frequency," Third Decennial US-USSR Conference on SETI, Santa Cruz, August 1991. ASP Conf. Series 47, S. Shostak (ed.), Astronomical Society of the Pacific, San Francisco, pp. 357-365 (1993).
Comments

Searching for narrow band, obviously artificial, signal at the frequency of 3He+ spin-flip, being radiated by advanced civilizations that have colonized their planetary systems.