M. Pomerantz, A. Segmüller, et al.
Thin Solid Films
We applied pulses of heat to liquid He and found that below the λ transition pulses of lower-than-ambient temperature propagate in the He II. This "cool" pulse is attributed to the temperature change that accompanies a compressive first-sound pulse. The temperature pulse is negative because the thermal expansion of He II is negative near the λ transition. © 1971 The American Physical Society.
M. Pomerantz, A. Segmüller, et al.
Thin Solid Films
M. Pomerantz, A. Aviram, et al.
Journal of Applied Physics
R.J. Purtell, M. Pomerantz
ACS PMSE 1989
M. Pomerantz, F.H. Dacol, et al.
Physical Review Letters