Spin exchange optical pumping at pressures near 1 bar for neutron spin filters

Rich, D. R.; Gentile, T. R.; Smith, T. B.; Thompson, A. K.; Jones, G. L.
March 2002
Applied Physics Letters;3/25/2002, Vol. 80 Issue 12, p2210
Academic Journal
Motivated by applications to neutron spin filters and recent advances in spectrally narrowed laser diode arrays (LDAs), we are exploring spin exchange optical pumping of [sup 3]He at pressures near 1 bar. Among our more interesting results has been the production of glass cells with extremely long relaxation times. The best of these has a lifetime of T[sub 1] = 840 h [where the polarization decays versus time, t, as exp(-t/T[sub 1])], dominated by the dipole-dipole contribution of 950 h at a [sup 3]He partial pressure of 0.85 bar. Using a broadband LDA, we have obtained 55% [sup 3]He nuclear polarization in this cell. These results are particularly relevant to the application of [sup 3]He-based neutron spin filters to neutron scattering and weak interaction experiments. Applications to magnetometry and polarized gas magnetic resonance imaging are also possible.


Related Articles

  • Multiple-spin effects in fast magic angle spinning Lee–Goldburg cross-polarization experiments in uniformly labeled compounds. Ladizhansky, V.; Vinogradov, E.; van Rossum, B.-J.; de Groot, H. J. M.; Vega, S. // Journal of Chemical Physics;3/22/2003, Vol. 118 Issue 12, p5547 

    The proton-carbon polarization exchange in Lee-Goldburg cross-polarization magic angle spinning (LG-CP MAS) nuclear magnetic resonance experiments on uniformly [sup 13]C-labeled compounds at high spinning frequency is studied. It is shown that the multiple carbon labels in the samples greatly...

  • Multiple quantum filtering and spin exchange in solid state nuclear magnetic resonance. Yong Ba; Ripmeester, John A. // Journal of Chemical Physics;5/22/1998, Vol. 108 Issue 20, p8589 

    Examines the multiple quantum filtering and spin exchange in solid state nuclear magnetic resonance (NMR). Influence of radio frequency pulses on coupled spins; Dynamics of multiple quantum NMR; Application of solid state NMR to detect the different domains of heterogeneous solids.

  • Chaos in spin clusters: Correlation functions and spectral properties. Srivastava, Niraj; Kaufman, Charles; Müller, Gerhard // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p4154 

    Presents a study which investigated the dynamic correlation functions for a pair of exchange-coupled spins with biaxial exchange and/or single-site anisotropy. Impact of nonintegrability on the autocorrelation functions and their spectral properties; Numerical results; Comparison of results...

  • Heavy electrons and the symplectic symmetry of spin. Flint, Rebecca; Dzero, M.; Coleman, P. // Nature Physics;Aug2008, Vol. 4 Issue 8, p643 

    The recent discovery of two heavy-fermion materials PuCoGa5 and NpPd5Al2, which transform directly from Curie paramagnets into superconductors, reveals a new class of superconductors where local moments quench directly into the superconducting condensate. Unlike other heavy-electron...

  • Exploring hyperpolarized 83Kr by remotely detected NMR relaxometry. Cleveland, Zackary I.; Pavlovskaya, Galina E.; Stupic, Karl F.; LeNoir, Catherine F.; Meersmann, Thomas // Journal of Chemical Physics;1/28/2006, Vol. 124 Issue 4, p044312 

    For the first time, a hyperpolarized (hp) noble gas with a nuclear electric quadrupole moment is available for high-field nuclear-magnetic-resonance (NMR) spectroscopy and magnetic-resonance imaging. Hp 83Kr (I=9/2) is generated by spin-exchange optical pumping and separated from the rubidium...

  • Note: Spin-exchange optical pumping in a van. Chauvin, C.; Liagre, L.; Boutin, C.; Mari, E.; Léonce, E.; Carret, G.; Coltrinari, B.; Berthault, P. // Review of Scientific Instruments;Jan2016, Vol. 87 Issue 1, p1 

    The advent of spin-hyperpolarization techniques designed to overcome the sensitivity issue of nuclear magnetic resonance owing to polarization transfer from more ordered systems has recently raised great enthusiasm. However, the out-of-equilibrium character of the polarization requires a close...

  • Odd behavior of giant quadrupole resonance.  // Physics Today;Jan75, Vol. 28 Issue 1, p18 

    Focuses on the behavior of a giant electric quadrupole resonance in nuclear spectra. Properties; Details on the resonance's mass number; Significance of radiative-capture experiments.

  • Magnetic Resonance in Beta-Active Nuclei [sup 8]Li at the Doubled Larmor Frequency in LiF Polycrystals Containing Dislocations. Abov, Yu. G.; Gul�ko, A. D.; Dzheparov, F. S.; Stepanov, S. V.; Trostin, S. S. // Physics of Atomic Nuclei;Nov2002, Vol. 65 Issue 11, p1999 

    The nuclear magnetic resonance in beta-active nuclei &[SUP8]Li at the doubled Larmor frequency in LiF polycrystals is studied before and after treating these polycrystals with an external pressure. A quantitative approach is proposed that makes it possible to calculate the parameters of the...

  • Nuclear spin echo with allowance for the dynamic frequency shift. Buishvili, T. L.; Chotorlishvili, L. L.; Tsanava, M. G. // Low Temperature Physics;Jul2000, Vol. 26 Issue 7, p537 

    The two-pulse nuclear spin echo is studied with allowance for the dynamic frequency shift due to the Suhl-Nakamura interaction. The time dependence of the echo signal amplitude is obtained for small angles of deviation of the magnetization. © 2000 American Institute of Physics.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics