✦ LIBER ✦
On the single relaxation time approximation (SRTA) in the kinetic theory of gas phase NMR
✍ Scribed by Wing-Ki Liu; F.R. McCourt
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 407 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The use of single-relaxation-time approximations (SRTA) in describing nuclear magnetic relaxation (NMR) is discussed and the proper identification of the relaxation parameters with collision cross sections is addressed. Two different SRTA curves giving the variation of the longitudinal relaxation time T, with number density R are evaluated using the exact numerical closccoupled results of Shafer and Gordon for molecular hydrogen infmitely dilute in helium and both SRTA curves are compared with that obtained from the full matrix inversion procedure.