The vapor deposition of high specific activity actinides

Silveira, Matthew J.; Pica, Ashley; Loveland, W.

doi:10.1016/j.nima.2020.164570

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…The combination of similar measurement times and the thinner 237 Np target lead to larger uncertainties in the 237 Np measurements. The actinides were deposited on ∼ 100 µg/cm 2 C foil by vapor deposition [4].…”

Section: Methodsmentioning

confidence: 99%

Total kinetic energy release in the fast neutron induced fission of actinide nuclei

2021

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The total kinetic energy (TKE) release in the fast neutron-induced fission of various actinide nuclei was measured for neutron energies for En =2.6-100 MeV at the Weapons Neutron Research facility of the Los Alamos National Laboratory. The data are compared to the GEF model of the fission process. The variances of the TKE distributions appear to decrease with increasing Z and A of the fissioning systems.

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Section: Methodsmentioning

confidence: 99%

Total kinetic energy release in the fast neutron induced fission of actinide nuclei

2021

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“…A 1 cm-radius circular target of 58.0 µg/cm 2 239 PuF 4 (determined by α-counting) was deposited by the vapor deposition method onto a ∼100 µg/cm 2 carbon foil that was previously glued to an aluminum frame. [49] The target assembly was then attached to the interior of an evacuated container for transport. After the scattering chamber was evacuated, the transport container was withdrawn and the target was exposed to the beam.…”

Section: Target Preparationmentioning

confidence: 99%

Total kinetic energy and mass yields from the fast neutron-induced fission of $^{239}$Pu

Chemey,

Pica,

Yao

et al. 2020

Preprint

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The total kinetic energy (TKE) release in fission is an important observable, constituting over 80% of the energy released in fission (E f ≈ 200 MeV). While the TKE release in the 239 Pu(n,f) reaction was previously measured up to 50 MeV incident neutron energy (E n ), there were features in TKE release at the highest values of E n that were puzzling. There was a marked flattening of TKE release from E n = 30 to 50 MeV, in disagreement with the clearly decreasing TKE observed from E n = 0.5 to 30 MeV. To verify and clarify this trend, TKE measurements at higher values of E n were made. We present absolute measurements of TKE release in 239 Pu(n,f) from E n = 2.4 to 100 MeV. We used silicon PIN detectors to measure the fragment energies and deduce mass-yield curves using the 2Emethod. We also discuss fission asymmetry and the relationships between approximate fission fragment mass and distortion.

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“…The vapor-phase method has attracted a lot of attention in recent years due to its efficient preparation of high-quality organic crystals. It can precisely conduct the process of purifying the substance, [1,2] growing various crystals, [3][4][5] and depositing thin films with organic [6][7][8][9][10][11] and inorganic [12][13][14][15][16][17] materials. Different from the solvent evaporation method, which is one of the most common crystal growth means, the vapor phase method allows for more direct control of the deposition rate as well as the sequence to obtain higher quality crystals.…”

Section: Introductionmentioning

confidence: 99%

Vapor‐Phase Growth Strategies of Fabricating Organic Crystals for Optoelectronic Applications

Xia

Ding

et al. 2022

Adv Elect Materials

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Vapor‐phase growth methods, taking the advantages of producing high‐quality crystals with low defects, thin thickness, and homogeneous composition, are of great significance in the field of organic crystal growth and their high‐performance applications. At present, the requirements for organic crystals as building blocks for the construction of optoelectronic devices are increasing with the constant advances in organic optoelectronics. Therefore, the vapor‐phase growth method would become one of the practical techniques that cannot be ignored to fabricate organic crystals. In this paper, an overview of different vapor‐phase growth methods for the preparation of organic single crystals is provided. An introduction to the current status of the vapor phase method is presented and the view on the challenges it faces with some promising solution ideas. It is believed that this review will serve as a reference for further development and an inspiration for the new way forward.

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The vapor deposition of high specific activity actinides

Cited by 9 publications

References 55 publications

Total kinetic energy release in the fast neutron induced fission of actinide nuclei

Total kinetic energy release in the fast neutron induced fission of actinide nuclei

Total kinetic energy and mass yields from the fast neutron-induced fission of $^{239}$Pu

Vapor‐Phase Growth Strategies of Fabricating Organic Crystals for Optoelectronic Applications

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