helium-4

(redirected from Superfluid helium 4)

helium-4

[′hē·lē·əm ′fȯr]
(nuclear physics)
The isotope of helium with mass number 4, constituting nearly all naturally occurring helium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.