| Autor: | I. I. Lukashevich, A. Safonov, I. Yasnikov, S. Jaakkola, S. Vasilyev |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Hydrogen Bose gas Condensation chemistry.chemical_element Condensed Matter Physics Atomic and Molecular Physics and Optics Superfluidity Reaction rate constant Adsorption chemistry General Materials Science Atomic physics Degeneracy (mathematics) Recombination |
| Zdroj: | Journal of Low Temperature Physics. 113:201-210 |
| ISSN: | 0022-2291 |
| DOI: | 10.1023/a:1022521910889 |
| Popis: | We have obtained two-dimensional (2D) Bose gas with the degeneracy parameter (phase-space density) up to 9 compressing magnetically atomic hydrogen adsorbed on liquid 4 He at about 0.2 K. We observed this 2D gas to go over to a state where the rate constant K bbb of three-body recombination of hydrogen atoms decreases with respect to its normal value. A steep decline in K bbb begins when the degeneracy parameter exceeds 3, i.e., before the criterion for 2D superfluidity is satisfied. The maximum observed suppresion of K bbb is essentially larger than 3! predicted for a three-body process in a fully (quasi)condensed sample. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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