Small angle neutron scattering with nuclear polarization on polymers

Abstract

The concept of contrast variation due to nuclear polarization has been reformulated with the emphasis on small angle neutron scattering (SANS) of polymers in solution. SANS has been performed on solid solutions of polystyrene in deuterated toluene. The hydrogen nuclei have been polarized dynamically by the solid effect. Using an unpolarized neutron beam, a nuclear polarization of 50 % enhanced the intensity of the small angle scattering by a factor of 2 with respect to a non-polarized sample

Small-angle scattering and its interplay with crystallography, contrast variation in SAXS and SANS

“…In the mid 80's, several groups embarked on experiments of polarized SANS from dynamically polarized proton spins in crown ethers (Kohgi et al, 1987), polymers (Glä ttli et al, 1989) and biological macromolecules (Knop et al, 1986(Knop et al, , 1992. All of them took advantage of a new type of polarized target material which had been optimized for high-energy-physics experiments.…”

Polarized proton spin density images the tyrosyl radical locations in bovine liver catalase

“…This was realised 40 years ago, when the dynamically polarized proton spins in an Nd 3+doped crystal of lanthanum magnesium nitrate were studied by polarized neutron scattering (Hayter et al, 1974;Leslie et al, 1980). It took another ten years before dynamically polarized protons in noncrystalline targets considerably widened the range of applications of neutron scattering (Knop et al, 1986;Kohgi et al, 1987;Glä ttli et al, 1989). These and later experiments on nuclear spin contrast variation (e.g.…”

Unique aspects of neutron scattering for the study of biological systems

“…'Ideal' neutron scattering experiments using polarized neutrons and polarized nuclei were very rare for a long time (Leslie et al 1980, Motoya et al 1980. In fact, their renaissance started only in the mid-1980s thanks to an extremely fruitful co-operation with particle physicists (Knop et al 1986, 1991, Koghi et al 1987, Glättli et al 1989. First results obtained at the ILL have been reported by van den Brandt et al (2002).…”