Applied Magnetic Resonance

, Volume 25, Issue 3–4, pp 475–483 | Cite as

Applications of adiabatic half passage to NQR

  • J. B. Miller
  • A. N. Garroway


The application of nuclear quadrupole resonance (NQR) to the detection of materials can be hampered by the low sensitivity of the technique. The use of surface coils for remote detection only exacerbates this problem. In this paper we demonstrate the advantages of adiabatic half passage (AHP) for NQR detection ofI=1 spins in powder samples. Under optimal conditions, AHP provides a 15% sensitivity enhancement over traditional optimized, pulsed excitation. AHP excitation is independent of ω1 over more than an order of magnitude variation in radio-frequency (rf) field strength, and can provide up to a factor of two or more sensitivity enhancement over traditional pulsed excitation in inhomogeneous rf magnetic fields. In pulsed spin-locking-type experiments, AHP as a prepulse can provide near constant signal amplitude over a factor of two variation in rf magnetic field strength.


Nuclear Magnetic Resonance Pulse Excitation Surface Coil Nuclear Quadrupole Resonance Sodium Nitrite 
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  1. 1.
    Bloch F.: Phys. Rev.70, 460–474 (1946)CrossRefADSGoogle Scholar
  2. 2.
    Bloch F., Hansen W.W., Packard M.: Phys. Rev.70, 474–485 (1946)CrossRefADSGoogle Scholar
  3. 3.
    Haase J., Conradi M.S.: Chem. Phys. Lett.209, 287–291 (1993)CrossRefADSGoogle Scholar
  4. 4.
    Grey C.P., Eijkelenboom A.P.A.M., Veeman W.S.: Solid-State Nucl. Magn. Reson.4, 113–120 (1995)CrossRefGoogle Scholar
  5. 5.
    Gullion T.: Chem. Phys. Lett.246, 325–330 (1995)CrossRefADSGoogle Scholar
  6. 6.
    De Graaf R.A., Nicolay K.: Concepts Magn. Reson.9, 247–268 (1997)CrossRefGoogle Scholar
  7. 7.
    Silver M.S., Joseph R.I., Hoult D.I.: Phys. Rev. A31, 2753–2755 (1985)CrossRefADSGoogle Scholar
  8. 8.
    De Graaf R.A., Luo Y., Terpstra M., Merkle H., Garwood M.: J. Magn. Reson. B106, 245–252 (1995)CrossRefGoogle Scholar
  9. 9.
    Bottomley P.A., Ouwerkerk R.: J. Magn. Reson. A103, 242–244 (1993)CrossRefGoogle Scholar
  10. 10.
    Garroway A.N., Buess M.L., Miller J.B., Suits B.H., Hibbs A.D., Barrall G.A., Matthews R., Burnett L.J.: IEEE Trans. Geosci. Remote Sens.39, 1108–1118 (2001)CrossRefADSGoogle Scholar
  11. 11.
    Hardy C.J., Edelstein W.A., Vatis D.: J. Magn. Reson.66, 470–482 (1986)Google Scholar
  12. 12.
    Chingas G.C., Garroway A.N., Moniz W.B. in: Topics in Carbon-13 NMR Spectroscopy, vol. 4 (Levy G.C., ed.), pp. 160–177. New York: Wiley 1984.Google Scholar
  13. 13.
    Das T.P., Hahn E.L.: Nuclear Quadrupole Resonance Spectroscopy. New York: Academic Press 1958.Google Scholar
  14. 14.
    Miller J.B., Suits B.H., Garroway A.N.: J. Magn. Reson.151, 228–234 (2001)CrossRefADSGoogle Scholar
  15. 15.
    Miller J.B., Garroway A.N.: Surface Coil Pair for Circularly Polarized Magnetic Resonance, presented at the 44th Experimental NMR Conference, Savannah, Georgia, 2003.Google Scholar
  16. 16.
    Li G.Y., Jiang Y., Wu X.W.: Chem. Phys. Lett.202, 82–86 (1993)CrossRefADSGoogle Scholar
  17. 17.
    Ramamoorthy A., Narasimhan P.T.: Z. Naturforsch. A45, 581–586 (1990); Ramamoorthy A.: Mol. Phys.93, 757–766 (1998)Google Scholar
  18. 18.
    Sauer K.L., Klug C.A., Miller J.B., Garroway A.N.: Appl. Magn. Reson.25, 485–500 (2004)Google Scholar
  19. 19.
    Marino R.A., Klainer S.M.: J. Chem. Phys.67, 3388–3389 (1977)CrossRefADSGoogle Scholar
  20. 20.
    Carr H.Y., Purcell E.M.: Phys. Rev.94, 630–638 (1954); Meiboom S., Gill D.: Rev. Sci. Instrum.29, 688–691 (1958)CrossRefADSGoogle Scholar
  21. 21.
    Rudakov T.N., Mikhaltsevitch V.T., Flexman J.H., Hayes P.A., Chisholm W.P.: Appl. Magn. Reson.25, 467–474 (2004)CrossRefGoogle Scholar

Copyright information

© Springer 2004

Authors and Affiliations

  • J. B. Miller
    • 1
  • A. N. Garroway
    • 1
  1. 1.Code 6120, Naval Research LaboratoryWashington, DCUSA

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