✦ LIBER ✦
An experiment to detect vacancies and their possible Bose-Einstein condensation in solid4He
✍ Scribed by P. G. Haar; C. M. C. M. Woerkens; M. W. Meisel; G. Frossati
- Publisher
- Springer US
- Year
- 1992
- Tongue
- English
- Weight
- 664 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0022-2291
No coin nor oath required. For personal study only.
✦ Synopsis
Using a capacitive pressure gauge, the pressure of a constant-volume 4Hesample was measured in the temperature range 1.5-120 mK, at pressures of 25.3 bar (on the melting curve) and26.0 bar. A gradual pressure change occurring as a consequence of the ideal gas behavior of vacancies, or a pressure anomaly corresponding to a Bose-Einstein condensation of the vacancies, was not observed. Within the sensitivity of the pressure gaug e (2 Pa), this result sets upper limits to the density of zero-point vacancies.