Detection of materials using nuclear quadrupole resonance (NQR) is often hampered by interference from remote radio frequency sources such as radio stations, and from local sources such as piezoelectric and magneto-acoustic ringing. NQR pulse sequences have been devised that reduce or eliminate the ringing, but these pulse sequences also reduce the NQR signal. We show that the signal reduction is the result of destructive interference between spin echoes created by multiple echo formation pathways. The destructive interference can be greatly reduced using composite refocusing pulses in the NQR pulse sequences to force the echoes into selected echo formation pathways.
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References
J. B. Miller, “Nuclear Quadrupole Resonance Detection of Explosives”, in “Counterterrorist Detection Techniques of Explosives”, J. Yinon ed., Elsevier, Amsterdam/London, 157 (2007).
M. L. Buess and G. L. Petersen, Rev. Sci. Instrum., 49, 1151 (1978).
E. Fukushima and S. B. W. Roeder, J. Magn. Reson., 33, 199 (1979).
K. Choi and I. Yu, Rev. Sci. Instrum., 60, 3249 (1989).
D. I. Hoult, C. -N. Chen, and V. J. Sank, Magn. Reson. Med., 1, 339 (1984).
C. -N. Chen and D. I. Hoult, “Biomedical Magnetic Resonance Technology” Adam Hilger, New York (1989).
Y. K. Lee, H. Robert, and D. K. Lathrop, J. Magn. Reson., 148, 355 (2001).
J. B. Miller, B. H. Suits, and A. N. Garroway, J. Magn. Reson., 151, 228 (2001).
J. B. Miller, A. N. Garroway, and B. H. Suits, Nuclear Quadrupole Resonance (NQR) Method and Probe for Generating RF Magnetic Fields in Different Directions to Distinquish NQR from Acoustic Ringing Induced in the Sample, US Patent No. 6 522 135 (2003).
R. A. Marino and S. M. Klainer, J. Chem. Phys., 67, 3388 (1977).
H. Y. Carr and E. M. Purcell, Phys. Rev., 94, 630(1954); S. Meiboom and D. Gill, Rev. Sci. Instrum., 29, 688 (1958).
D. Ya. Osokin, J. Mol. Struct., 83, 243 (1982); D. Ya. Osokin, Mol. Phys., 48, 283 (1983); D. Ya. Osokin, V. L. Ermakov, R. H. Kurbanov, and V. A. Shagalov, Z. Naturforsch., Teil A 47, 439 (1992).
A. K. Dubey and P. T. Narasimhan, J. Mol. Struct., 192, 321 (1989).
V. T. Mikhaltsevitch, T. N. Rudakov, J. H. Flexman, P. A. Hayes, and W. P. Chisholm, Appl. Magn. Reson., 25, 449 (2004).
G. A. Barrall, L. J. Burnett, and A. G. Shelton, Method and System for Cancellation of Extraneous Signals in Nuclear Quadrupole Resonance Spectroscopy, US Patent No. 6 392 408 (2002).
M. L. Buess, A. N. Garroway, and J. P. Yesinowski, Removing the Effects of Acoustic Ringing and Reducing Temperature Effects in the Detection of Explosives by NQR, US Patent No. 5 365 171 (1994).
K. L. Sauer and C. A. Klug, Phys. Rev. B, 74, 174410 (2006).
M. H. Levitt, R. Freeman, and T. A. Frenkiel, J. Magn. Reson., 47, 328 (1982).
M. H. Levitt, Prog. NMR Spectroscop., 18, 61 (1986).
M. Garwood and L. DelaBarre, J. Magn. Reson., 153, 155 (2001).
A. Ramamoorthy and P. T. Narasimhan, J. Mol. Struct., 192, 333 (1989).
G. -Y. Li and X. -W. Wu, Chem. Phys. Lett., 204, 529 (1993).
A. Ramamoorthy, N. Chandrakumar, A. K. Dubey, and P. T. Narasimhan, J. Magn. Reson., 102, 274 (1993).
A. Ramamoorthy, Mol. Phys., 93, 757 (1997).
V. T. Mikhaltsevitch, T. N. Rudakov, J. H. Flexman, P. A. Hayes, and W. P. Chisholm, Sol. St. Nucl. Magn. Reson., 25, 61 (2004).
G. -Y. Li, Y. Jiang, and X. -W. Wu, Chem. Phys. Lett., 202, 82 (1993).
V. P. Anferov and G. V. Mozzhukhin, Russ. Phys. J., 42, 826 (1999).
K. L. Sauer, C. A. Klug, J. B. Miller, and A. N. Garroway, Appl. Magn. Reson., 25, 485 (2004).
S. Z. Ageev and B. C. Sanctuary, Chem Phys. Lett., 225, 499 (1994).
C. Schurrer and S. C. Perez, Appl. Magn. Reson., 16, 135 (1999).
J. B. Miller and A. N. Garroway, Appl. Magn. Reson., 25, 475 (2004).
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Miller, J.B., Sauer, K.L., Klug, C.A., Buess, M.L. (2009). Efficient Excitation and Ringing Suppression in Nuclear Quadrupole Resonance. In: Fraissard, J., Lapina, O. (eds) Explosives Detection Using Magnetic and Nuclear Resonance Techniques. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3062-7_4
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DOI: https://doi.org/10.1007/978-90-481-3062-7_4
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