12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Observation of crossover from ballistic to diff...
View graph of relations

« Back

Observation of crossover from ballistic to diffusion regime for excimer molecules in superfluid 4He

Research output: Contribution to journalJournal article

Published

Journal publication date05/2013
JournalJournal of Low Temperature Physics
Journal number3-4
Volume171
Number of pages7
Pages207-213
Early online date14/09/12
Original languageEnglish

Abstract

We have measured the temperature dependence of the time of flight of helium excimer molecules He2 (a3 Σ + u ) in superfluid 4He and find that the molecules behave ballistically below ∼100 mK and exhibit Brownian motion above ∼200 mK. In the intermediate temperature range the transport cannot be described by either of the models.