LaCl3(Ce) and LaBr3(Ce) gamma-ray spectra with various plutonium isotopic and uranium enrichment standards

Sullivan, J.P.; Rawool-Sullivan, M.W.; Wenz, Tracy R.

doi:10.1007/s10967-008-0620-z

Cited by 13 publications

(12 citation statements)

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“…The measured energy range was about 50-1800 keV. Finally, some parameters embedded within the sequential Bayesian processor must be initialized to adapt to the background radiation in the laboratory environment and the intrinsic radiation from the LaBr 3 (Ce) crystal [14][15][16][17]. A typical spectrum under laboratory background was measured in 1000 s as shown in Fig.…”

Section: On-line Radionuclide Detection Experiments On-line Experimenmentioning

confidence: 99%

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

Xiang

Wang²,

Tian

et al. 2015

J Radioanal Nucl Chem

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A rapid detection method based on sequential Bayesian analysis provides a new perspective on national security in preventing the smuggling and illegal transportation of nuclear materials. In this paper, a sequential Bayesian analysis system, which mainly consists of a LaBr 3 (Ce) scintillator detector, a pulse analyzer based on a field-programmable gate array technique, and a sequential Bayesian analysis processor, is developed to directly validate the feasibility of sequential Bayesian analysis. The detection ability of 60 Co, 137 Cs, 133 Ba, and 152 Eu for a specific radioactivity is studied and quantified using the maximum detection distance and the equivalent minimum detection activity.

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Section: On-line Radionuclide Detection Experiments On-line Experimenmentioning

confidence: 99%

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

Xiang

Wang²,

Tian

et al. 2015

J Radioanal Nucl Chem

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“…Gamma rays spectra from the Pu samples have been studied making use of the LaBr(Ce) scintillator, needed to disentangle the complex spectra [9]. Few gamma ray transitions are identified: the lines at E =373, 414 and 451 keV which can be attributed to the 239 Pu decay and those at E = 662 and 772 keV from the 241 Am decay.…”

Section: Detection In Passive Modementioning

confidence: 99%

Special nuclear material detection studies with the SMANDRA mobile system

Cester¹,

Nebbia²,

Stevanato³

et al. 2012

AIP Conference Proceedings

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Abstract. The detection of special nuclear material has been studied with the SMANDRA mobile inspection system used both as a high sensitivity passive neutron/gamma spectroscopic tool and as an active inspection device using tagged neutrons. The detection of plutonium samples is possible with passive interrogation, the passive detection of uranium being much more difficult because of the low neutron yield and of the easiness of shielding the gamma rays. However, we show that active interrogation with tagged neutrons is able to provide signatures for the discrimination of uranium against other materials.

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“…Introduction of room temperature medium resolution detectors, such as CdZnTe (CZT) and LaBr 3 (Ce), with superior spectroscopic performance compared to such traditional room temperature detectors as NaI, has opened new possibilities in many radiation detection applications (Sullivan et al, 2008;Prosper et al, 2012). Indeed, their compact design and absence of cryogenics are an advantage in many practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…One of the fields where attractive features and spectroscopic performance of both detectors can be advantageous is nuclear safeguards. Indeed, CZT and LaBr 3 (Ce) detectors were proposed as possible alternatives to spectrometers based on traditional HPGe and NaI detectors for isotopic determination tasks of uranium and plutonium bearing materials (Ruhter, 1998;Sullivan et al, 2008). The energy resolution of CZT and LaBr 3 (Ce) detectors is significantly better compared to that of NaI detectors, allowing for a more detailed information available in the measured spectrum.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of a 500 mm3 CZT and a 2x2 inch LaBr3(Ce) detectors for the determination of the uranium enrichment using the enrichment-meter method and calibration standards for safeguards applications

Meleshenkovskii

Pauly

Labeau

2020

Applied Radiation and Isotopes

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Determination of the uranium enrichment is an important safeguards verification task, routinely carried out using non-destructive assay methods. The enrichment-meter method is one of the most widely used passive nondestructive X-and gamma-ray based methods used for such tasks. Among its advantages is the highly constrained physical nature of its underlying formalism, allowing it to be used with high-resolution HPGe detectors, as well as with low-resolution NaI detectors. Due to attractive features and spectroscopic performance, CdZnTe and LaBr 3 (Ce) detectors raised interest in their application to such tasks as well. However, their spectroscopic performance is different to that of the traditional detectors in many ways. Application of the enrichment-meter method requires determination of the net peak areas corresponding to 235 U signature photopeaks. The latter requires an adequate algorithm to select the region-of-interest boundaries, which may be sensitive to asymmetrical photopeaks of CZT detectors. In this paper we conduct a performance assessment of a 500 mm 3 CZT detector of a quasihemispherical design and a 2 � 2 inch LaBr 3 (Ce) scintillator with the enrichment-meter method using a set of certified uranium standards with enrichment degrees from 0.31% to 4.46% of 235 U atomic abundance. We investigate the impact of different methods used for net peak area determination, statistical quality of acquired spectra and size of region-of-interest boundaries on accuracy and uncertainty. We propose an algorithm for symmetrical/asymmetrical region-of-interest boundaries determination and make recommendations on the best combinations of the region-of-interest size and method used for the net peak area determination for each of the detectors. The underlying routines of the algorithm and analysis procedures are described in detail and results are presented.

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LaCl3(Ce) and LaBr3(Ce) gamma-ray spectra with various plutonium isotopic and uranium enrichment standards

Cited by 13 publications

References 1 publication

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

Special nuclear material detection studies with the SMANDRA mobile system

Performance assessment of a 500 mm3 CZT and a 2x2 inch LaBr3(Ce) detectors for the determination of the uranium enrichment using the enrichment-meter method and calibration standards for safeguards applications

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LaCl3(Ce) and LaBr3(Ce) gamma-ray spectra with various plutonium isotopic and uranium enrichment standards

Cited by 13 publications

References 1 publication

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

On-line experiments on rapid detection of radionuclides based on sequential Bayesian analysis

Special nuclear material detection studies with the SMANDRA mobile system

Performance assessment of a 500 mm3 CZT and a 2x2 inch LaBr3(Ce) detectors for the determination of the uranium enrichment using the enrichment-meter method and calibration standards for safeguards applications

Contact Info

Product

Resources

About

Performance assessment of a 500 mm3 CZT and a 2x2 inch LaBr3(Ce) detectors for the determination of the uranium enrichment using the enrichment-meter method and calibration standards for safeguards applications