Positron Annihilation in Undercooled Water and Ice
Positron lifetime and Doppler broadened annihilation line at wide temperature range 15-300 K was measured. The phase transition at melting temperature and its temperature shift in undercooled water was observed. The change in temperature dependence of long lifetime component in region 150 K was observed. The lifetime distributions (by program MELT) were calculated in full temperature range with an accent for the phase transition temperature range.
O. Šauša et al., "Positron Annihilation in Undercooled Water and Ice", Materials Science Forum, Vol. 666, pp. 115-118, 2011