We report a high energy-resolution neutron backscattering study, combined with in situ diffraction, to investigate slow molecular motions on nanosecond time scales in the fluid phase of phospholipid bilayers of 1,2-dimyristoyl-sn-glycero-3-phoshatidylcholine. A cooperative structural relaxation process was observed. From the in-plane scattering vector dependence of the relaxation rates in hydro...

Photodesintegration rates – like (γ ,n), (γ ,p), and (γ ,α) – play an important role in the nucleosynthesis of the so-called p nuclei. These proton-rich, in general very low-abundant isotopes cannot be produced by neutron capture reactions. Experiments using continuous-energy bremsstrahlung and the activation technique are perfectly suited to carry out systematic surveys on (γ ,n) reactions. In...

Ginga and Rossi X-ray Timing Explorer (RXTE) observations have allowed an unprecedented view of the recurrent systematic pulse shape changes associated with the 35-day cycle of Hercules X-1, a phenomenon currently unique among the known accretion-powered pulsars. We present observations of the pulse shape evolution. An explanation for the pulse evolution in terms of a freely precessing neutron ...

The purpose of this study is to build the binary logit model of an airport pavement that could monitor the pavement condition in near real time using microwave remote sensing satellite, then the relationship between the international roughness index (IRI) of an airport and backscattering values from PALSAR images of the ALOS satellite was determined. Total 390 data were used in analysis. This m...

background: miniature neutron sources with high neutron flux have abundant applications in medicine, industry and researches. the most important general characteristic of miniature neutron sources is their diameter which is 3mm in average. in this research, we have surveyed and designed an am-be miniature neutron source fabrication. materials and methods: this investigation resulted in creation...

A parametrized conceptual design for a radial collimator in neutron backscattering instrument is presented, with application to the characteristic geometry of MIRACLES spectrometer, that will be constructed at European Spallation Source (ESS). The analytic development this has considered both forward scattering (sample-analyzer) and (analyzer-detectors) pathways. All dimensions (internal extern...