Abstract
A study of the nuclear-magnetic-resonance (NMR) absorption line shape in solid hcp D2 in the nondiffusive region is presented. The mole fraction C of paramolecules (i. e., those with) a rotational angular momentum J=1) ranged from 0.02 to 0.93, and the temperature was varied between 0.5 and 10 °K. Both continuous-wave (cw) and pulse (free-induction-decay) methods were used to obtain complementing information on the NMR absorption line shape. It is shown that the line shape attributed to J=1 molecules broadens rapidly with decreasing temperature. At low enough temperatures, cw experiments record only the absorption from the J=0 molecules. Second moments M2 were obtained from the analysis of both cw and pulse experiments. Over a restricted range of molé fractions and temperatures, M2 both for the signal from all the molecules and for that from the J=0 molecules alone could be obtained separately from the free induction decay. The extrapolation of M2 to the high-temperature limit where the line shape is determined by random intermolecular nuclear dipole-dipole interactions is in good agreement with theoretical predictions. A discussion is presented of the observed and theoretically expected temperature variation of M2 for both J=1 and J=0 molecules. The results support the calculations by Harris which take account of admixtures of the J=2 excited state in the J=0 ground-state wave function, caused by the interactions with J=1 molecules.
| Original language | English |
|---|---|
| Pages (from-to) | 3730-3737 |
| Number of pages | 8 |
| Journal | Physical Review B |
| Volume | 3 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1971 |
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- Condensed Matter Physics
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Study of the nuclear-magnetic-resonance line shape in hcp D2. / Weinhaus, F.; Myers, S. M.; Maraviglia, B.; Meyer, H.
In: Physical Review B, Vol. 3, No. 11, 1971, p. 3730-3737.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study of the nuclear-magnetic-resonance line shape in hcp D2
AU - Weinhaus, F.
AU - Myers, S. M.
AU - Maraviglia, B.
AU - Meyer, H.
PY - 1971
Y1 - 1971
N2 - A study of the nuclear-magnetic-resonance (NMR) absorption line shape in solid hcp D2 in the nondiffusive region is presented. The mole fraction C of paramolecules (i. e., those with) a rotational angular momentum J=1) ranged from 0.02 to 0.93, and the temperature was varied between 0.5 and 10 °K. Both continuous-wave (cw) and pulse (free-induction-decay) methods were used to obtain complementing information on the NMR absorption line shape. It is shown that the line shape attributed to J=1 molecules broadens rapidly with decreasing temperature. At low enough temperatures, cw experiments record only the absorption from the J=0 molecules. Second moments M2 were obtained from the analysis of both cw and pulse experiments. Over a restricted range of molé fractions and temperatures, M2 both for the signal from all the molecules and for that from the J=0 molecules alone could be obtained separately from the free induction decay. The extrapolation of M2 to the high-temperature limit where the line shape is determined by random intermolecular nuclear dipole-dipole interactions is in good agreement with theoretical predictions. A discussion is presented of the observed and theoretically expected temperature variation of M2 for both J=1 and J=0 molecules. The results support the calculations by Harris which take account of admixtures of the J=2 excited state in the J=0 ground-state wave function, caused by the interactions with J=1 molecules.
AB - A study of the nuclear-magnetic-resonance (NMR) absorption line shape in solid hcp D2 in the nondiffusive region is presented. The mole fraction C of paramolecules (i. e., those with) a rotational angular momentum J=1) ranged from 0.02 to 0.93, and the temperature was varied between 0.5 and 10 °K. Both continuous-wave (cw) and pulse (free-induction-decay) methods were used to obtain complementing information on the NMR absorption line shape. It is shown that the line shape attributed to J=1 molecules broadens rapidly with decreasing temperature. At low enough temperatures, cw experiments record only the absorption from the J=0 molecules. Second moments M2 were obtained from the analysis of both cw and pulse experiments. Over a restricted range of molé fractions and temperatures, M2 both for the signal from all the molecules and for that from the J=0 molecules alone could be obtained separately from the free induction decay. The extrapolation of M2 to the high-temperature limit where the line shape is determined by random intermolecular nuclear dipole-dipole interactions is in good agreement with theoretical predictions. A discussion is presented of the observed and theoretically expected temperature variation of M2 for both J=1 and J=0 molecules. The results support the calculations by Harris which take account of admixtures of the J=2 excited state in the J=0 ground-state wave function, caused by the interactions with J=1 molecules.
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U2 - 10.1103/PhysRevB.3.3730
DO - 10.1103/PhysRevB.3.3730
M3 - Article
AN - SCOPUS:35949040399
VL - 3
SP - 3730
EP - 3737
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 11
ER -