title: Determination of neutron energy spectrum at KAMINI shielding experiment location.
abstract: The neutron spectrum at KAMINI reactor south beam tube end has been determined using multifoil activation method. This beam tube is being used for characterizing neutron attenuation of novel shield materials. Starting from a computed guess spectrum, the spectrum adjustment/unfolding procedure makes use of minimization of a modified constraint function representing (a) least squared deviations between the measured and calculated reaction rates, (b) a measure of sharp fluctuations in the adjusted spectrum and (c) the square of the deviation of adjusted spectrum from the guess spectrum. The adjusted/unfolded spectrum predicts the reaction rates accurately. The results of this new procedure are compared with those of widely used SAND-II code.
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India. Electronic address: sujoy@igcar.gov.in.
authors.forename: Sujoy
authors.initials: S
authors.lastname: Sen
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India.
authors.forename: Subhrojit
authors.initials: S
authors.lastname: Bagchi
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India.
authors.forename: R R
authors.initials: RR
authors.lastname: Prasad
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India.
authors.forename: D
authors.initials: D
authors.lastname: Venkatasubramanian
authors.affiliation: MCNS, Manipal University, Manipal, India.
authors.forename: P
authors.initials: P
authors.lastname: Mohanakrishnan
authors.affiliation: M.S. Ramaiah University of Applied Sciences, Bangaluru, India.
authors.forename: R S
authors.initials: RS
authors.lastname: Keshavamurty
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India.
authors.forename: Adish
authors.initials: A
authors.lastname: Haridas
authors.affiliation: Radiation Shielding and Data Division, IGCAR, Kalpakkam, India.
authors.forename: A John
authors.initials: AJ
authors.lastname: Arul
authors.affiliation: Reactor Design Group, IGCAR, Kalpakkam, India.
authors.forename: P
authors.initials: P
authors.lastname: Puthiyavinayagam
keywords: Foil activation; KAMINI; Monte Carlo modeling; Spectrum unfolding