Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

SELECTION OF SUITABLE MONOCHROMATOR & NEUTRON WAVELENGTH FOR TAS AT AERE (Pages : 44 - 49)

Four single crystals Cu(222), Cu(111), Si(111) and PG(002) are used as a monochromator crystal in spectrometer of Atomic Energy Research Establishment (AERE), Savar, Dhaka. The present work consists of a theoretical study in which the suitable range of wavelength of neutron and a monochromator has been chosen for which the diffraction pattern would be contamination free. The neutron flux ratio at half wave wavelength (i.e. percentage of) is determined by examining the Maxwell wavelength distribution of the neutron flux in the TRIGA reactor at AERE. The structure factor ratio of the mentioned monochromator has been calculated. It is found that Neutrons having wavelength 0.05 to 0.95Å are suitable for those monochromators and Si(111) is the best monochromator to get second order contamination free neutron beam for experiments. This may provide a great help in selecting suitable neutron wavelength and proper monochrommator to get 22/?Ind order contamination free patterns.Download