R. Henderson
YOU?
Author Swipe
View article: Towards the Discovery of New Elements: Production of Livermorium (Z=116) with 50Ti
Towards the Discovery of New Elements: Production of Livermorium (Z=116) with 50Ti Open
The $^{244}$Pu($^{50}$Ti,$xn$)$^{294-x}$Lv reaction was investigated at Lawrence Berkeley National Laboratory's 88-Inch Cyclotron facility. The experiment was aimed at the production of a superheavy element with $Z\ge 114$ by irradiating a…
View article: Fission neutron output measurements at LANSCE
Fission neutron output measurements at LANSCE Open
Accurate data for both physical properties and fission properties of materials are necessary to properly model dynamic fissioning systems. To address the need for accurate data on fission neutron energy spectra, especially at outgoing neut…
View article: Liquid semiconductor-halogen based electronics
Liquid semiconductor-halogen based electronics Open
According to one embodiment, a device includes a first electrode, a second electrode spaced from the first electrode, a well extending between the first electrode and the second electrode, one or more chalcogens in the well, and at least o…
View article: Quick Look Report of Godiva U233 shot March 2022 Data Collection Activities
Quick Look Report of Godiva U233 shot March 2022 Data Collection Activities Open
This report discussing the March 2022 irradiation of U233 on the Godiva critical assembly using burst mode and subsequent analysis of the fission products starting at 65 minutes post irradiation, and ending 12 days later. The Short-Lived F…
View article: Three dimensional radioisotope battery and methods of making the same
Three dimensional radioisotope battery and methods of making the same Open
According to one embodiment, a product includes an array of three dimensional structures, where each of the three dimensional structure includes a semiconductor material; a cavity region between each of the three dimensional structures; an…
View article: Radiation tolerant microstructured three dimensional semiconductor structure
Radiation tolerant microstructured three dimensional semiconductor structure Open
According to one embodiment, a product includes an array of three dimensional structures, a cavity region between each of the three dimensional structures, and a first material in contact with at least one surface of each of the three dime…
View article: Experimental Prompt Fission Neutron Spectra Comparisons for the <sup>235,238</sup>U(<i>n, f</i>) and <sup>239</sup>Pu(<i>n, f</i>) Reactions
Experimental Prompt Fission Neutron Spectra Comparisons for the <sup>235,238</sup>U(<i>n, f</i>) and <sup>239</sup>Pu(<i>n, f</i>) Reactions Open
The Chi-Nu project to measure prompt fission neutron energy spectra for the major actinides has now completed two measurements, for neutron-induced fission of 239 Pu and 235 U for incident neutron energies from 1 to 20 MeV, and has almost …
View article: LANL/LLNL <sup>240</sup>Pu(<em>n,f</em>) Prompt Fission Neutron Spectrum Measurement (Q4 FY2022 Progress Report)
LANL/LLNL <sup>240</sup>Pu(<em>n,f</em>) Prompt Fission Neutron Spectrum Measurement (Q4 FY2022 Progress Report) Open
The report details the joint LANL/LLNL measurement of the 240Pu(n,f) prompt fission neutron spectrum (PFNS) for incident neutron energies from 1–20 MeV. A summary of the experimental setup, including details of the parallel-plate avalanche…
View article: Measurement of the <sup>240</sup>Pu(n,f) Prompt Fission Neutron Spectra with Chi-Nu
Measurement of the <sup>240</sup>Pu(n,f) Prompt Fission Neutron Spectra with Chi-Nu Open
The DOE Nuclear Criticality Safety Program has funded a multi-year effort to measure the 240Pu(n,f) Prompt Fission Neutron Spectrum at Chi-Nu. This project is a joint LANL-LLNL effort, involving the preparation of 12 240Pu foils and constr…
View article: Beta Radiation Hardness of GYGAG(Ce) Transparent Ceramic Scintillators
Beta Radiation Hardness of GYGAG(Ce) Transparent Ceramic Scintillators Open
GYGAG(Ce) transparent ceramic garnet scintillators were irradiated with electrons from 0.5 to 2 MeV with fluences from 1016e– /cm2 to 1019e– /cm2, corresponding to doses from 0.3 to 310 Gigarad. Absorption spectra were measured before and …
View article: Parallel-Plate Avalanche Counter (PPAC) Fabrication for <sup>240</sup>Pu PFNS Measurement [Slides]
Parallel-Plate Avalanche Counter (PPAC) Fabrication for <sup>240</sup>Pu PFNS Measurement [Slides] Open
A LANL-LLNL joint program has been developed successfully to measure PFNS and established the most precisely determined $\\chi$ matrices for 235,238U and 239Pu. It has been extended to 240Pu now and possibly to 233U in the future. An alter…
View article: A parallel-plate avalanche counter for the prompt fission neutron spectrum measurement
A parallel-plate avalanche counter for the prompt fission neutron spectrum measurement Open
Neutrons, gamma’s, and fission fragments are among the prompt fission observables. Their precision measurements are fundamental to advance our understanding of fission and any application of fission. For our programmatic need, the χ matrix…
View article: Analysis of Interdicted Samples From Australia (Final Report)
Analysis of Interdicted Samples From Australia (Final Report) Open
U3O8 and UO2. While aliquoting NSR-F-270409-2 for analysis, a metal staple of unknown origin was discovered in the sample. The presence of 236U and 232U in both samples indicates that the uranium feed stocks for these samples experienced a…
View article: Electrodeposition of Uranium and Plutonium on Thin Carbon and Titanium Substrates
Electrodeposition of Uranium and Plutonium on Thin Carbon and Titanium Substrates Open
Preparation of Pu and U targets on thin natural C (100 {micro}g/cm{sup 2}) and ti (2 and 3 {micro}m) substrates is described. The Actinide material of interest was first purified using ion exchange chromatography to remove any matrix conta…
View article: Preview Issue 205
Preview Issue 205 Open
Ted Tyne: PresidentTel: 0434 074 123Email: [email protected] Annetts: President ElectTel: 0411 756 129Email: [email protected] Atkinson: Secretary (Membership Committee Cha...
View article: Report on Short-Lived Fission Product Yields from <sup>239</sup>Pu
Report on Short-Lived Fission Product Yields from <sup>239</sup>Pu Open
The Short-Lived Fission Product Yield (SLFPY) project is one of many efforts in the NA22 F2016 Venture Project. The objective of the SLFPY project is to provide improved measurements of fission product yields for select nuclides. The measu…
View article: Observations of poorly-known features of the <sup>239</sup>Pu and <sup>235</sup>U prompt fission neutron spectra
Observations of poorly-known features of the <sup>239</sup>Pu and <sup>235</sup>U prompt fission neutron spectra Open
Prompt fission neutron spectrum (PFNS) evaluations use provide nuclear data for the PFNS across a wide range of incident and outgoing neutron energies. However, experimental data underlying the evaluation are sparse, inconsistent, and inco…
View article: Comparing fission-product yields from photon-induced fission of <sup>240</sup>Pu and neutron-induced fission of <sup>239</sup>Pu as a test of the Bohr hypothesis in nuclear fission
Comparing fission-product yields from photon-induced fission of <sup>240</sup>Pu and neutron-induced fission of <sup>239</sup>Pu as a test of the Bohr hypothesis in nuclear fission Open
Fission product yields (FPYs) are a uniquely sensitive probe of the fission process, with well established dependence on the species of nucleus undergoing fission, its excitation energy and spin. Thus FPYs are well suited for testing Bohr’…