NDLI: Prompt neutrons from photofission and its use in homeland security applications

Content Provider	IEEE Xplore Digital Library
Author	Danagoulian, A. Bertozzi, W. Hicks, C.L. Klimenko, A.V. Korbly, S.E. Ledoux, R.J. Wilson, C.M.
Copyright Year	2010
Description	Author affiliation: Passport Systems Inc., Billerica, MA, USA (Danagoulian, A.; Bertozzi, W.; Hicks, C.L.; Klimenko, A.V.; Korbly, S.E.; Ledoux, R.J.; Wilson, C.M.)
Abstract	Photofission is the process in which a nucleus disintegrates into two daughter products after absorbing a photon. Photofission near threshold in actinides is very similar to spontaneous fission in terms of the number of emitted decay neutrons and their energy distribution. Most of the neutrons are in the ∼2 MeV energy range, and can be efficiently detected with liquid scintillator detectors. Thus, Prompt Neutrons from Photofission (PNPF) near threshold can be used as an excellent tool for the detection of actinides. Since the photofission cross section for most fissionable materials drops to near zero for incident photon energies of less than 6 MeV, a source of photons with a higher energy is needed, for example 9 MeV. At this energy interference from (γ, n) processes is minimal. Photon sources in this energy range are well suited for other non-intrusive inspection applications as well as searching for fissionable materials. Passport Systems, Inc. is currently operating a continuous wave (CW) 9 MeV electron accelerator and an array of liquid scintillator detectors to achieve this goal. Pulse shape discrimination (PSD) techniques are used determine the particle type. The remaining neutrons are also filtered through an in-house developed pileup rejection algorithm. The resulting neutron count is compared with the known background to determine the confidence level for possible shielded Special Nuclear Material identification. Initial testing of this system has been performed and the results will be presented. The results show the utility of a CW photon source as well as the ability to fuse the PNPF data with other data to reduce the dose to cargo, or scan times.
Starting Page	379
Ending Page	384
File Size	623026
Page Count	6
File Format	PDF
ISBN	9781424460472
e-ISBN	9781424460489
DOI	10.1109/THS.2010.5654938
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protons Computational modeling Nondestructive testing Nuclear Physics Materials Neutron detectors Neutrons Photonics Radiation Detectors Nuclear fuels Detectors Alarm systems Scintillation Detectors Nuclear Measurements System Analysis & Design Testing
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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