A nuclear magnetic resonance (NMR) study of the molecular quantum dynamics of hydrogen trapped in solid C60 is presented. Rotational-state selective NMR spectra are shown. The analysis of the spectra provides a direct map of the molecular orientational probability distribution and of the rotational wave functions. Perturbations of the free rotor behavior due to rotor-phonon interactions and due to the S6 symmetry of the confining cage potential are discussed.

1.
H. W.
Kroto
et al.,
Nature (London)
318
,
162
(
1985
).
2.
P. H. M.
van Loosdrecht
et al.,
Phys. Rev. Lett.
73
,
3415
(
1994
).
3.
J. E.
Fischer
and
P. A.
Heiney
,
J. Phys. Chem. Solids
54
,
1725
(
1993
).
4.
M.
Saunders
et al.,
Nature (London)
367
,
256
(
1994
).
5.
I.
Holleman
et al.,
Phys. Rev. Lett.
79
,
1138
(
1997
).
6.
M.
Tomaselli
et al.,
J. Chem. Phys.
113
,
5141
(
2000
).
7.
S. A.
FitzGerald
et al.,
Phys. Rev. B
60
,
6439
(
1999
).
8.
N. F.
Ramsey
,
Phys. Rev.
85
,
60
(
1952
);
R. F.
Code
and
N. F.
Ramsey
,
Phys. Rev. A
4
,
1945
(
1971
).
9.
Negligible leakage of the interstitial hydrogen was observed below 120 K.
10.
W. I. F.
David
et al.,
Europhys. Lett.
18
,
219
(
1992
).
11.
R.
Tycko
et al.,
Phys. Rev. Lett.
67
,
1886
(
1991
).
12.
G. Herzberg, Molecular Spectra and Molecular Structure Vol. I (Krieger, 1950, Malabar).
13.
M. P.
Volz
et al.,
Phys. Rev. Lett.
63
,
2582
(
1989
).
14.
N.
Weiden
et al.,
Phys. Rev. Lett.
85
,
1544
(
2000
).
15.
A. C.
Dillon
et al.,
Nature (London)
386
,
377
(
1997
);
P.
Chen
et al.,
Science
285
,
91
(
1999
);
C.
Lui
et al.,
Science
286
,
1127
(
1999
).
This content is only available via PDF.
You do not currently have access to this content.