R.J. Von Gutfeld, H.L. Caswell
Applied Physics Letters
Results of heat-pulse measurements between 4 and 54°K are reported for sapphire and show that the propagation is ballistic below 18°K and diffusive above 40°K. In the intermediate range, the propagation is a superposition of the two. © 1966 The American Physical Society.
R.J. Von Gutfeld, H.L. Caswell
Applied Physics Letters
A.H. Nethercot, R.J. Von Gutfeld
Physical Review
Charles Weiss Jr., Kenneth T. Solnit, et al.
BBA - Bioenergetics
R.J. Von Gutfeld
Applied Physics Letters