High quality actinide targets

Loveland, W.

doi:10.1007/s10967-015-4337-5

Cited by 13 publications

(7 citation statements)

References 12 publications

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“…The targets were produced at Oregon State University and the process is described in Ref. [16]. The target isotopic composition is discussed in Sec.…”

Section: Fissiontpc Designmentioning

confidence: 99%

“…The α-band from spontaneous decay and (n, α) reactions appears to the right of the proton recoils. The lightly populated bands at energies above the α-band are recoils from heavier nuclei (such as 12 C or 16 O) or break-up reactions from high energy neutron interactions in the detector or gas. Removal of potential α backgrounds in the fission count is discussed in Sec.…”

Section: Particle Identification With the Fissiontpcmentioning

confidence: 99%

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Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

Snyder

Anastasiou²,

Bowden³

et al. 2021

Preprint

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The 239 Pu(n,f)/ 235 U(n,f) cross-section ratio has been measured with the fission Time Projection Chamber (fissionTPC) from 100 keV to 100 MeV. The fissionTPC provides three-dimensional reconstruction of fission-fragment ionization profiles, allowing for a precise quantification of measurement uncertainties. The measurement was performed at the Los Alamos Neutron Science Center which provides a pulsed white source of neutrons. The data are recommended to be used as a cross-section ratio shape. A discussion of the status of the absolute normalization and comparisons to ENDF evaluations and previous measurements is included.

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“…The targets were produced at Oregon State University and the process is described in Ref. [16]. The target isotopic composition is discussed in Sec.…”

Section: Fissiontpc Designmentioning

confidence: 99%

Section: Particle Identification With the Fissiontpcmentioning

confidence: 99%

Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

Snyder

Anastasiou²,

Bowden³

et al. 2021

Preprint

Self Cite

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“…The actinide deposits were made at the center of the disk, on opposite sides, with a diameter of 2 cm. The uranium sample was deposited with vacuum volatilization, while the plutonium sample was molecular plated [9,10]. The fis-sionTPC was used to image the target through tracking of the α-particles from the decaying actinides.…”

Section: Actinide Targetmentioning

confidence: 99%

Measurement of material isotopics and atom number ratio with alpha-particle spectroscopy for the NIFFTE fission Time Projection Chamber actinide target

Monterial,

Schmitt,

Prokop

et al. 2021

Preprint

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We present the results of a measurement of isotopic concentrations and atomic number ratio of a double-sided actinide target with α-spectroscopy and mass spectrometry. The double-sided actinide target, with primarily 239 Pu on one side and 235 U on the other, was used in the fission Time Projection Chamber (fissionTPC) for a measurement of the neutron-induced fission cross-section ratio between the two isotopes. The measured atomic number ratio is intended to provide an absolute normalization of the measured fission cross-section ratio. The 239 Pu/ 235 U atom number ratio was measured with a combination of mass spectrometry and α-spectroscopy with a planar silicon detector with uncertainties of less than 1%.

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“…Constant current density molecular plating was used to create this sample [6]. The plating solvent used in this process, an isopropanol-isobutanol mixture, has been shown to result in a residual layer of cracked solvent molecules on the surface of the target referred to as crud [7]. Energy loss of fission fragments travel through the solvent layer, backing and target material itself is corrected.…”

Section: Experimental Set Upmentioning

confidence: 99%

Total kinetic energy and fragment mass distributions from fission of Th-232 and U-233

et al. 2018

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Properties of fission in Th-232 and U-233 were studied at the Los Alamos Neutron Science Center at incident neutron energies from subthermal to 40 MeV. Fission fragments are observed in coincidence using a twin ionization chamber with Frisch grids. The average total kinetic energy released from fission and fragment mass distributions are calculated from observations of energy deposited and conservation of mass and momentum. Accurate experimental measurements of these parameters are necessary to better understand the fission process in isotopes relevant to the thorium fuel cycle, in which Th-232 is used as a fertile material to generate the fissile isotope of U-233. This process mirrors the uranium breeder process used to produce Pu-239 with several potential advantages including the comparative greater abundance of thorium, inherent nuclear weapons proliferation resistance, and reduced actinide production. Thus, there is increased interest in the thorium fuel cycle to meet future energy demands and improve safety and security while increasing profitability for the nuclear power industry. This research is ongoing and preliminary results are presented.

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High quality actinide targets

Cited by 13 publications

References 12 publications

Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

Measurement of material isotopics and atom number ratio with alpha-particle spectroscopy for the NIFFTE fission Time Projection Chamber actinide target

Total kinetic energy and fragment mass distributions from fission of Th-232 and U-233

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