title: Polarization enhancement technique for nuclear quadrupole resonance detection.
abstract: We demonstrate a dramatic increase in the signal-to-noise ratio (SNR) of a nuclear quadrupole resonance (NQR) signal by using a polarization enhancement technique. By first applying a static magnetic field to pre-polarize one spin subsystem of a material, and then allowing that net polarization to be transferred to the quadrupole subsystem, we increased the SNR of a sample of ammonium nitrate by one-order of magnitude.
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA. Electronic address: youngjin@lanl.gov.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: T
authors.initials: T
authors.lastname: Karaulanov
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: A N
authors.initials: AN
authors.lastname: Matlashov
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: S
authors.initials: S
authors.lastname: Newman
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: A
authors.initials: A
authors.lastname: Urbaitis
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: P
authors.initials: P
authors.lastname: Volegov
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: J
authors.initials: J
authors.lastname: Yoder
authors.affiliation: Los Alamos National Laboratory, P.O. Box 1663, MS-D454, Los Alamos, NM 87545, USA.
authors.forename: M A
authors.initials: MA
authors.lastname: Espy
mesh_terms: D053834:Explosive Agents / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*
chemical_list: D053834:Explosive Agents
keywords: Ammonium nitrate; Nitrogen-14; Nuclear quadrupole resonance (NQR); Polarization enhancement NQR