jan 1, 1961 - Solid Helium-4 discovery
Description:
In 1961, Vignos and Fairbank reported the existence of a different phase of solid helium-4, designated the gamma-phase. It exists for a narrow range of pressure between 1.45 and 1.78 K.Added to timeline:
Date:
jan 1, 1961
Now
~ 65 years ago