Combination of proton-nitrogen level crossing polarization transfer and pulsed spin-locking sequence makes N14 nuclear quadrupole resonance (NQR) in trinitrotoluene fast and sensitive enough to be used in routine detection of explosives. Enhancement factors for all three N14 NQR lines (the case with η0) were calculated and compared with experimental values. Good agreement between measured and calculated signal enhancement factors was observed. N14 NQR signals in a 15g trinitrotoluene sample of predominantly monoclinic modification were measured in 15s in different polarization magnetic fields. The conditions for optimal proton-nitrogen level crossing were determined.

1.
V. S.
Grechishkin
and
N. J.
Sinjavsky
,
Phys. Usp.
40
,
393
(
1997
).
2.
J. P.
Yesinowski
,
M. L.
Buess
, and
A. N.
Garroway
,
Anal. Chem.
67
,
2256
(
1995
).
3.
V. S.
Grechishkin
,
Appl. Phys. A: Solids Surf.
55
,
505
(
1992
).
4.
A. N.
Garroway
,
M. L.
Buess
,
J. B.
Miller
,
B. H.
Suits
,
A. D.
Hibbs
,
G. A.
Barrall
,
R.
Matthews
, and
L. J.
Burnett
,
IEEE Trans. Geosci. Remote Sens.
GE-39
,
1108
(
2001
).
5.
J. A. S.
Smith
,
R. M.
Deas
, and
M. J.
Gaskell
,
International Conference on Requirements and Technologies for the Detection, Removal and Neutralization of Landmines and UXO
, edited by
H.
Shali
,
A. M.
Bottoms
, and
J.
Cornelis
, 15–18 September
2003
(
Vrije Universiteit Brussels
,
Brussels, Belgium
,
2003
), Vol.
2
, p.
715
.
6.
J. A. S.
Smith
,
Chem. Soc. Rev.
15
,
225
(
1986
).
7.
E.
Balchin
,
D. J.
Malcolme-Lawes
,
I. J. F.
Poplett
,
M. D.
Rowe
,
J. A. S.
Smith
,
D. E. S.
Pearce
, and
S. A. C.
Wren
,
Anal. Chem.
77
,
3925
(
2005
).
8.
R.
Blinc
,
J.
Seliger
,
A.
Zidansek
,
V.
Zagar
,
F.
Milia
, and
H.
Robert
,
Solid State Nucl. Magn. Reson.
30
,
61
(
2006
).
9.
J.
Seliger
,
R.
Blinc
,
M.
Mali
,
R.
Osredkar
, and
A.
Prelesnik
,
Phys. Rev. B
11
,
27
(
1975
).
10.
R. E.
Slusher
and
E. L.
Hahn
,
Phys. Rev.
166
,
332
(
1968
).
11.
R.
Blinc
,
J.
Seliger
,
D.
Arcon
,
P.
Cevc
, and
V.
Zagar
,
Phys. Status Solidi A
180
,
541
(
2000
).
12.
M.
Nolte
,
A.
Privalov
,
J.
Altmann
,
V.
Anferov
, and
F.
Fujara
,
J. Phys. D
35
,
939
(
2002
).
13.
J.
Seliger
,
V.
Žagar
, and
R.
Blinc
,
J. Magn. Reson., Ser. A
106
,
214
(
1994
).
14.
D.
Kruk
,
J.
Altmann
,
F.
Fujara
,
A.
Gaedke
,
M.
Nolte
, and
A. F.
Privalov
,
J. Phys.: Condens. Matter
17
,
519
(
2005
).
15.
K. R.
Thurber
,
K. L.
Sauer
,
M. L.
Buess
,
C. A.
Klug
, and
J. B.
Miller
,
J. Magn. Reson.
177
,
118
(
2005
).
16.
J.
Luznik
,
J.
Pirnat
, and
Z.
Trontelj
,
Solid State Commun.
121
,
653
(
2002
).
17.
R.
Blinc
,
T.
Apih
, and
J.
Seliger
,
Appl. Magn. Reson.
25
,
523
(
2004
).
18.
V. S.
Grechishkin
,
V. P.
Anferov
, and
N. J.
Sinjavsky
,
Adv. Nucl. Quadrupole Reson.
5
,
13
(
1983
).
19.
T.
Mikhaltsevitch
and
A. V.
Beliakov
,
Solid State Commun.
138
,
409
(
2006
).
20.
A.
Abragam
,
The Principles of Nuclear Magnetism
(
Clarendon
,
Oxford
,
1961
).
21.
M.
Goldman
,
Spin Temperature and Nuclear Magnetic Resonance in Solids
(
Oxford University Press
,
Oxford
,
1970
).
22.
D. T.
Edmonds
,
Phys. Rep., Phys. Lett.
29
,
233
(
1977
).
23.
T. P.
Das
and
E. L.
Hahn
,
Nuclear Quadrupole Resonance Spectroscopy
(
Academic
,
New York
,
1958
).
24.
R. A.
Marino
and
R. F.
Connors
,
J. Mol. Struct.
111
,
323
(
1983
).
25.
R. M.
Deas
,
M. J.
Gaskell
,
K.
Long
,
N. F.
Pierson
,
M. D.
Rowe
, and
J. A. S.
Smith
,
Proc. SPIE
5415
,
510
(
2004
).
26.
A.
Naito
,
A.
Root
, and
C. A.
McDowell
,
J. Phys. Chem.
95
,
3578
(
1991
).
27.
J.
Luznik
,
J.
Pirnat
,
V.
Jazbinsek
,
T.
Apih
,
A.
Gregorovic
,
R.
Blinc
,
J.
Seliger
, and
Z.
Trontelj
,
Appl. Phys. Lett.
89
,
123509
(
2006
).
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