Use of delayed gamma rays for active non-destructive assay of 235U irradiated by pulsed neutron source (plasma focus)

被引：5

作者：

Andola, Sanjay ^{[1
]}

Niranjan, Ram ^{[1
]}

Kaushik, T. C. ^{[1
]}

Rout, R. K. ^{[1
]}

Kumar, Ashwani ^{[2
]}

Paranjape, D. B. ^{[2
]}

Kumar, Pradeep ^{[2
]}

Tomar, B. S. ^{[2
]}

Ramakumar, K. L. ^{[2
]}

Gupta, S. C. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Appl Phys, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Radioanalyt Chem Div, Bombay 400085, Maharashtra, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2014年 / 753卷

关键词：

Non-destructive assay; Active interrogation; Delayed gammas; U-235; Plasma focus; Pulsed neutron source; FISSILE MATERIALS; INTERROGATION; SIGNATURES;

D O I：

10.1016/j.nima.2014.03.020

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A pulsed neutron source based on plasma focus device has been used for active interrogation and assay of U-235 by monitoring its delayed high energy gamma-rays. The method involves irradiation of fissile material by thermal neutrons obtained after moderation of a burst of neutrons emitted upon fusion of deuterium in plasma focus (PF) device. The delayed gamma rays emitted from the fissile material as a consequence of induced fission were detected by a large volume sodium iodide (Nal(Tl)) detector. The detector is coupled to a data acquisition system of 2k input size with 2k ADC conversion gain. Counting was carried out in pulse height analysis mode for time integrated counts up to 100 s while the temporal profile of delayed gamma has been obtained by counting in multichannel scaling mode with dwell time of 50 ms. To avoid the effect of passive (natural) and active (from surrounding materials) backgrounds, counts have been acquired for gamma energy between 3 and 10 NleV. The lower limit of detection of U-235 in the oxide samples with this set-up is estimated to be 14 mg. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：138 / 142

页数：5

共 26 条

[1]

[Anonymous], 2013, GENIE 35

[2] Identification of fissile materials from fission product gamma-ray spectra [J].

Beddingfield, DH ;

Cecil, FE .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 417 (2-3) :405-412

[3] Detection of high-energy delayed gammas for nuclear waste packages characterization [J].

Carrel, F. ;

Agelou, M. ;

Gmar, M. ;

Laine, F. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2011, 652 (01) :137-139

[4] Novel methodology for the quantitative assay of fissile materials using temporal and spectral β-delayed γ-ray signatures [J].

Chivers, D. H. ;

Alfonso, K. ;

Goldblum, B. L. ;

Ludewigt, B. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2011, 269 (16) :1829-1835

[5] Delayed gamma studies from photo-fission of 237Np for nuclear waste characterization [J].

Dighe, P. M. ;

Berthoumieux, E. ;

Dore, D. ;

Laborie, J. M. ;

Ledoux, X. ;

Macary, V. ;

Panebianco, S. ;

Ridikas, D. .

ANNALS OF NUCLEAR ENERGY, 2009, 36 (03) :399-403

[6]

Ferrari A., FLUKA: A multiparticle transport code (program version 2023)

[7]

FILIPPOV NV, 1962, NUCL FUSION, P577

[8] DELAYED GAMMAS FROM FAST-NEUTRON FISSION OF TH232 U233 U235 U238 + PU239 [J].

FISHER, PC ;

ENGLE, LB .

PHYSICAL REVIEW B, 1964, 134 (4B) :B796-+

[9] Fission Signatures for Nuclear Material Detection [J].

Gozani, Tsahi .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2009, 56 (03) :736-741

[10]

Gupta S.C., 2011, 20 IAEA TECHN M RES

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