Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons

Bhatia, C.; Fallin, B.; Gooden, Matthew; Howell, C. R.; Kelley, J. H.; Tornow, W.; Arnold, C. W.; Bond, E. M.; Bredeweg, T. A.; Fowler, M. M.; Moody, W. A.; Rundberg, R. S.; Rusev, G.; Vieira, D. J.; Wilhelmy, J.B.; Becker, J. A.; Macri, R. A.; Ryan, Christopher M.; Sheets, S. A.; Stoyer, M. A.; Tonchev, A. P.

doi:10.1016/j.nima.2014.03.022

Cited by 29 publications

(17 citation statements)

References 7 publications

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“…The incident deuteron beam passes through the Havar foil and the deuterium gas before being stopped in a tantalum beam stop. Quasi-monoenergetic neutrons are produced via the 2 H(d,n) 3 He reaction. A dual-fission chamber is located in close proximity of the deuterium gas cell.…”

Section: Experimental Overviewmentioning

confidence: 99%

“…In addition, a liquid scintillator based neutron detector was positioned about 3 m further downstream to monitor the neutron flux, and to measure the neutron energy spectrum in auxiliary measurements performed with pulsed incident deuterons. 3 He setup using a dual-fissionchamber detector and a neutron detector.…”

Section: Experimental Overviewmentioning

confidence: 99%

“…A schematic of the deuterium gas cell is shown in Fig. 4(b) of [3]. The resulting neutron beam from the 2 H(d,n) 3 He reaction at 0˚ has a calculated mean energy of 9.00 MeV with an energy spread of 0.54 MeV (FWHM).…”

Section: A Neutron Productionmentioning

confidence: 99%

“…4(b) of [3]. The resulting neutron beam from the 2 H(d,n) 3 He reaction at 0˚ has a calculated mean energy of 9.00 MeV with an energy spread of 0.54 MeV (FWHM). However, in addition to these monoenergetic neutrons there are also small components of lower energy neutrons.…”

Section: A Neutron Productionmentioning

confidence: 99%

“…However, in addition to these monoenergetic neutrons there are also small components of lower energy neutrons. These neutrons are referred to as off-energy neutrons and are described in [3].…”

Section: A Neutron Productionmentioning

confidence: 99%

See 4 more Smart Citations

Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
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Section: Experimental Overviewmentioning

confidence: 99%

Section: Experimental Overviewmentioning

confidence: 99%

Section: A Neutron Productionmentioning

confidence: 99%

Section: A Neutron Productionmentioning

confidence: 99%

Section: A Neutron Productionmentioning

confidence: 99%

See 3 more Smart Citations

Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
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25
0
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Benchmarking the repeatability of a pneumatic cyclic neutron activation analysis facility using 16 O(n,p) 16 N for nuclear forensics

Pierson

Griffin

Flaska

et al. 2015

Applied Radiation and Isotopes

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A target was prepared for cyclic neutron activation analysis by heat sealing lithium-carbonate in polyethylene. The target was cyclically irradiated 50 times using a Thermo-Scientific accelerator based deuterium-tritium fusion neutron generator. During counting periods, gamma-rays emitted by (16)N were detected using three high-purity germanium detectors acquiring data in list-mode. Total counts acquired in each spectrum were compared between the three detectors to examine variability in geometric positioning of the target and variability of the generator intensity throughout the experiment. These two effects were determined to be the primary sources of variation in the measured counts. Variation in target positioning and generator intensity were found to increase the standard deviation by 34% and 33%, respectively. Transit times to the detector were found to be slower and more variable than transit to the generator but were well below the half second threshold needed to measure short-lived radionuclides with half-lives on the order of seconds. The standard deviation in irradiation time was found to be less than 1 milliseconds. The impact on statistical variability in the measured counts was negligible relative to the two primary sources of variation. Spectra acquired from each cycle were summed together. The sum of the peak areas from the 6.1 MeV gamma-ray and its corresponding single and double escape peaks were used to measure the half-life of (16)N. The result of 7.108(15)seconds derived from data suggests that the currently published value of 7.13(2)seconds has minimal systematic bias induced by background.

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Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV

Gooden

Arnold

Becker

et al. 2016

Nuclear Data Sheets

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has performed a set of absolute Fission Product Yield (FPY) measurements. Using monoenergetic neutron at energies between 0.5 and 14.8 MeV, the excitation functions of a number of fission products from 235 U, 238 U and 239 Pu have begun to be mapped out. This work has practical applications for the determination of weapon yields and the rate of burn-up in nuclear reactors, while also providing important insight into the fission process. Combining the use of a dual-fission ionization chamber and-ray spectroscopy, absolute FPYs have been determined for approximately 15 di↵erent fission products. The dual-fission chamber is a back-to-back ionization chamber system with a 'thin' actinide foil in each chamber as a monitor or reference foil. The chamber holds a 'thick' target in the center of the system such that the target and reference foils are of the same actinide isotope. This allows for simple mass scaling between the recorded number of fissions in the individual chambers and the number of fissions in the center thick target, eliminating the need for the knowledge of the absolute fission cross section and its uncertainty. The 'thick' target was removed after activation and-rays counted with well shielded High Purity Germanium (HPGe) detectors for a period of 1.5-2 months.

show abstract

Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons

Cited by 29 publications

References 7 publications

Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
0
25
0
View full text Add to dashboard Cite

Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
0
25
0
View full text Add to dashboard Cite

Benchmarking the repeatability of a pneumatic cyclic neutron activation analysis facility using 16 O(n,p) 16 N for nuclear forensics

Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV

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Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons

Cited by 29 publications

References 7 publications

Exploratory study of fission product yields of neutron-induced fission ofU235, U238Bhatia1, Fallin2, Gooden3 et al. 2015Phys. Rev. CSelf Cite230250View full textAdd to dashboardCite

Exploratory study of fission product yields of neutron-induced fission ofU235, U238Bhatia1, Fallin2, Gooden3 et al. 2015Phys. Rev. CSelf Cite230250View full textAdd to dashboardCite

Benchmarking the repeatability of a pneumatic cyclic neutron activation analysis facility using 16 O(n,p) 16 N for nuclear forensics

Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV

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Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
0
25
0
View full text Add to dashboard Cite

Exploratory study of fission product yields of neutron-induced fission ofU235, U238
Bhatia
¹
,
Fallin
²
,
Gooden
³

et al. 2015
Phys. Rev. C
Self Cite
23
0
25
0
View full text Add to dashboard Cite