Positronium in Phase IV and Rotator Phase of Long-Chain Alkanes

• Authors: B. Zgardzińska , T. Goworek
• Languages of publication: EN

Abstracts

EN

Ortho-positronium lifetime and intensity was measured as a function of temperature and pressure for some n-alkanes in which so-called "phase IV" appears. This phase is characterized by slightly increased ortho-positronium lifetime compared to low-temperature phases. It was found that the effect of quenching positronium by light does not appear in all phases from phase IV upwards. The lifetime in the rotator phases becomes equal to that in liquids, and only the change of positronium formation intensity allows to detect the solid-liquid transition in positron lifetime measurements.

Keywords

EN

36.10.Dr   61.80.Fe   71.60.+z   78.70.Bj  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 5
• Pages: 1551-1555

Dates

published

2008-05

received

2007-09-03

References

• 1. T. Oyama, K. Takamizawa, Y. Ogawa, Kobunshi Ronbunshu 37, 711 (1980) (in Japanese)
• 2. J. Kansy, Nucl. Instrum. Methods Phys. Res. A 374, 235 (1996)
• 3. M. Maroncelli, Song Ping Qi, H.L. Strauss, R.G. Snyder, J. Am. Chem. Soc. 104, 6237 (1982)
• 4. T. Hirade, F.H.J. Maurer, M. Eldrup, Radiat. Phys. Chem. 58, 465 (2000)
• 5. T. Goworek, J. Wawryszczuk, R. Zaleski, B. Zgardzińska, Radiat. Phys. Chem. 76, 185 (2007)
• 6. J. Doucet, I. Denicol`o, A.F. Craievich, C. Germain, J. Chem. Phys. 80, 1647 (1980)

Identifiers

DOI

10.12693/APhysPolA.113.1551