P, Priyada and Udupi, Ashwini and P.K, Sarkar (2017) Estimation of neutron energy distributions from prompt gamma emissions. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 871 (1). pp. 83-89. ISSN 0168-9002
![]() |
PDF
Estimation of neutron energy distributions from prompt gamma emissions.pdf Restricted to Registered users only Download (2MB) | Request a copy |
Abstract
A technique of estimating the incident neutron energy distribution from emitted prompt gamma intensities from a system exposed to neutrons is presented. The emitted prompt gamma intensities or the measured photo peaks in a gamma detector are related to the incident neutron energy distribution through a convolution of the response of the system generating the prompt gammas to mono-energetic neutrons. Presently, the system studied is a cylinder of high density polyethylene (HDPE) placed inside another cylinder of borated HDPE (BHDPE) having an outer Pb-cover and exposed to neutrons. The emitted five prompt gamma peaks from hydrogen, boron, carbon and lead can be utilized to unfold the incident neutron energy distribution as an under-determined deconvolution problem. Such an under-determined set of equations are solved using the genetic algorithm based Monte Carlo de-convolution code GAMCD. Feasibility of the proposed technique is demonstrated theoretically using the Monte Carlo calculated response matrix and intensities of emitted prompt gammas from the Pb-covered BHDPE–HDPE system in the case of several incident neutron spectra spanning different energy ranges.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | Prompt gammaNeutron spectrum estimationUnfoldingGenetic algorithmGAMCD codeFLUKA codeMonte carlo simulation |
Subjects: | Departments at MU > Manipal Centre for Natural Sciences |
Depositing User: | MCNS Editor |
Date Deposited: | 31 Aug 2017 08:59 |
Last Modified: | 31 Aug 2017 08:59 |
URI: | http://eprints.manipal.edu/id/eprint/149622 |
Actions (login required)
![]() |
View Item |