title: Revisiting NMR composite pulses for broadband (2)H excitation.
abstract: Quadrupolar echo NMR spectroscopy of static solids often requires RF excitation that covers spectral widths exceeding 100 kHz, which is difficult to obtain due to instrumental limitations. In this work we revisit four well-known composite pulses (COM-I, II, III and IV) for broadband excitation in deuterium quadrupolar echo spectroscopy. These composite pulses are combined with several phase cycling schemes that were previously shown to decrease finite pulse width distortions in deuterium solid-echo experiments performed with two single pulses. The simulations and experiments show that COM-II and IV composite pulses combined with an 8-step phase cycling aid in achieving broadband excitation with limited pulse width distortions.
authors.affiliation: Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China; UCCS, University Lille North of France, Villeneuve d׳Ascq 59652, France.
authors.forename: Ming
authors.initials: M
authors.lastname: Shen
authors.affiliation: Department of Physics, Hunter College, New York, NY 10065, USA.
authors.forename: Rabia
authors.initials: R
authors.lastname: Roopchand
authors.affiliation: Center for Advanced Radiological Sciences, Division of Nuclear Medicine and Molecular Imaging Physics, Department of Radiology, Harvard Medical School and Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA; Department of Physics and Technology, The City University of New York, 2155 University Avenue, CPH 118, Bronx, New York, NY 10453, USA. Electronic address: emananga@gc.cuny.edu.
authors.forename: Eugene S
authors.initials: ES
authors.lastname: Mananga
authors.affiliation: Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China; UCCS, University Lille North of France, Villeneuve d׳Ascq 59652, France.
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Amoureux
authors.affiliation: Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China.
authors.forename: Qun
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Physics Department, Brooklyn College, 2900 Bedford Avenue, Brooklyn, NY 11210, USA. Electronic address: gboutis@brooklyn.cuny.edu.
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Boutis
authors.affiliation: Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai 200062, China. Electronic address: bwhu@phy.ecnu.edu.cn.
authors.forename: Bingwen
authors.initials: B
authors.lastname: Hu
mesh_terms: D003903:Deuterium / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008962:Models, Theoretical
chemical_list: D003903:Deuterium
keywords: Composite pulses; Deuterium; Phase cycling; Quadrupolar echo