|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(05) [May 2004] >
| Title: | Four-level approximation in disordered medium |
| Authors: | Sakwa, W T
Khanna, K M
Mueni, M
Rotich, S
Torongey, P K |
| Keywords: | Superfluidity
Disordered medium
Four-level approximation |
| Issue Date: | May-2004 |
| Publisher: | CSIR |
| IPC Code: | H01B 12/00 |
| Abstract: | The adsorption of superfluid 4He into a disordered
medium, the disappearance of superfluidity due to adsorption, and the
subsequent appearance of superfluidity when more 4He flows into the
disordered medium have been described by the four-level approximation. The
adsorption of superfluid 4He into a disordered medium depletes the
ZMS as the particles shift to higher excited levels resulting in ‘four-level
approximation’. Superfluidity reappears on further adsorption but at a lower
temperature implying that the Tc value of a four-level system
should be lower than the Tc value for a three-level system,
which is in agreement with the experimental observations. |
| Page(s): | 355-360 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(05) [May 2004]
|
|
