Adaptation of triple axis neutron spectrometer for SANS measurements using alumina samples at TRIGA reactor of Bangladesh

• Published in: Physica. B, Condensed matter Condensed matter, 2005-09, Vol.366 (1), p.11-16
• Main Authors: Ahmed, F.U., Kamal, I., Yunus, S.M., Datta, T.K., Azad, A.K., Zakaria, A.K.M., Goyal, P.S.
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Monochromator; Neutron diffraction and scattering; Neutron scattering techniques (including small-angle scattering); Neutron spectrometer; Particle size; Physics; Radius of gyration; SANS; Structure of solids and liquids; crystallography
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2005.03.045

Double crystal method known as Bonse and Hart's technique has been employed to develop small angle neutron scattering (SANS) facility on a triple axis neutron spectrometer at TRIGA Mark II (3 MW) research reactor of Atomic Energy Research Establishment (AERE), Savar, Dhaka, Bangladesh. Two Si(1 1 1) crystals with very small mosaic spread ∼1 min have been used for this purpose. At an incident neutron wavelength of 1.24 Å, this device is useful for SANS in the Q range between 1.6×10 −3 and 10 −1 Å −1. This Q range allows investigating particle sizes and interparticle correlations on a length scale of ∼200 Å. Results of SANS experiments on three alumina (Al 2O 3) samples as performed using above setup are presented. It is seen that Al 2O 3 particles, indeed, scatter neutrons in regions of small angles. It is also seen that scattering is different for different samples showing that it changes with a change in particle size.