Positronium in Alkanes at High Pressure of Argon and Nitrogen
Positron lifetime spectra were measured for several alkanes under high pressure of argon and nitrogen. In the case of argon intercalation, the dependence of melting temperature on pressure is nonmonotonous, while in nitrogen this effect does not appear.
S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean
B. Zgardzińska et al., "Positronium in Alkanes at High Pressure of Argon and Nitrogen", Materials Science Forum, Vol. 607, pp. 45-47, 2009