An epithermal neutron camera based on energy-filtered imaging with gas electron multipliers was developed. Epithermal neutron imaging is achievable without time-of-flight detection of neutrons by using a resonance filter and a thermal neutron absorber. This technique is applicable to compact accelerator-based neutron sources. Blurring of epithermal neutron images caused by neutron scattering in...

The structure of the two-neutron halo C is investigated by means of a renormalized zero-range three-body model, with interactions in the s-wave channel, and a finite-range model with twoand three-body forces provided by the hyperspherical adiabatic expansion method. In both models the halo wave function in configuration space is obtained by using as inputs the two-body scattering lengths and th...

Proton and neutron densities have been obtained for the even-even isotopes of Sn from 100 Sn to 176 Sn using a Hartree-Fock-Bogoliubov model with a Skyrme interaction. The matter densities so defined have been used with realistic nucleon-nucleon interactions in a folding model to specify optical potentials for the elastic scattering of protons with energies in the range 40 to 200 MeV. Those pot...

The neutron powder diffractometer NPD at the Manuel Lujan Neutron Scattering Center (MLNSC) at Los Alamos National Laboratory is the neutron powder diffractometer with the highest resolution in the United States. We are currently upgrading NPD by adding a large number of position-sensitive detectors in the backscattering position. The upgraded instrument will make it possible to collect data fr...

It is a long debated question whether catalytic activities of enzymes, which lie on the millisecond timescale, are possibly already reflected in variations in atomic thermal fluctuations on the pico- to nanosecond timescale. To shed light on this puzzle, the enzyme human acetylcholinesterase in its wild-type form and complexed with the inhibitor huperzine A were investigated by various neutron ...

Beginning from the first neutron spin-echo study of the shape fluctuations of mi-croemulsion droplets [J.] these experiments are incorrectly interpreted in the literature. This is due to an inappropriate account for the fluctuations and the erroneous application of the original theory to the description of the experiments (see [V. Lisy and B. Bru-tovsky, Czech J. Phys. 50, 239 (2000)]). In the ...

Quantitative structures were obtained for the fully hydrated fluid phases of dioleoylphosphatidylcholine (DOPC) and dipalmitoylphosphatidylcholine (DPPC) bilayers by simultaneously analyzing x-ray and neutron scattering data. The neutron data for DOPC included two solvent contrasts, 50% and 100% D(2)O. For DPPC, additional contrast data were obtained with deuterated analogs DPPC_d62, DPPC_d13, ...

8 collimations 109-209-209-209 we obtained a wavevector resolution of dQ=Q ˆ 0:0020. Inelastic neutron scattering. A 50-g powder sample was sealed with He exchange gas in a thin-walled aluminium can for the inelastic neutronscattering experiments at the NIST centre for neutron research. For energy transfers ,40 meV we used a direct geometry time-of̄ight (TOF) spectrometer in the neutron energy g...