Explanipedia

Manufacturing and characterization of a boron-loaded fast-cured plastic organic scintillator Open

Tyler D. Doležal, J. Manfredi, Brian G. Frandsen, James E. Bevins, Connor M. Gautam , et al. · 2023

Effects of Gamma Ray Radiation on the Performance of Microelectromechanical Resonators Open

David D. Lynes, Hengky Chandrahalim, James E. Bevins, James C. Petrosky · 2023

This illustration portrays the effect of Co-60 gamma ray radiation on piezoelectric microelectromechanical resonators. Compton scattering initially occurs, resulting in electron ionization and the scattering of a lower-energy X-ray photon.…

Effects of Gamma Ray Radiation on the Performance of Microelectromechanical Resonators Open

David D. Lynes, Hengky Chandrahalim, James E. Bevins, James C. Petrosky · 2023

While much radiation test data are available for metal‐oxide‐semiconductor (MOS) devices, research into the effects of radiation on microelectromechanical systems (MEMS) is in its relative infancy. Piezoelectrically transduced MEMS resonat…

Fast-, Light-Cured Scintillating Plastic for 3D-Printing Applications Open

Brian G. Frandsen, M. Febbraro, Thomas Ruland, Theodore W. Stephens, Paul Hausladen , et al. · 2023

Additive manufacturing techniques enable a wide range of possibilities for novel radiation detectors spanning simple to highly complex geometries, multi-material composites, and metamaterials that are either impossible or cost prohibitive …

Boron-loaded deuterated liquid scintillator response characterization for neutron spectroscopy Open

Bryan V. Egner, M. Febbraro, Darren E. Holland, James E. Bevins · 2022

The False Dilemma: Rethinking AF Science and Technology Officer Talent Management Open

James E. Bevins · 2022

In 2019, Secretary of the Air Force (SECAF) Heather Wilson launched the 2030 Science and Technology (S&T) Strategy by stating, “The advantage will go to those who create the best technologies and who integrate and field them in creative op…

Spatially-variant isotope production burnup modeling in a CANDU-6 reactor for nuclear treaty monitoring Open

Aaron W. Burkhardt, Abigail A. Bickley, James E. Bevins · 2021

A CANDU-6 nuclear reactor is modeled as a 3D quarter-core model using Monte-Carlo and burnup techniques to quantify the spatially-variant isotope production for Nuclear Treaty Monitoring applications. Fuel shuffling and refueling technique…

ATHENA: A unique radiation environment platform at the National Ignition Facility Open

Nicholas J. Quartemont, George Peterson, Colton M. Moran, Adib J. Samin, Buguo Wang , et al. · 2021

Uranium integral fission product yields for a spectrally-shaped 14.1 MeV neutron source at the National Ignition Facility Open

Nicholas J. Quartemont, N. Gharibyan, K. J. Moody, James E. Bevins · 2021

Regenerative neural network for rotating scatter mask radiation imaging Open

Robert J. Olesen, James B. Cole, Darren E. Holland, E. Brubaker, James E. Bevins · 2021

Impact of neutron energy on asteroid deflection performance Open

Lansing S. Horan, Darren E. Holland, Megan Bruck Syal, James E. Bevins, Joseph Wasem · 2021

Measurement of the 160Gd(p,n)160Tb excitation function from 4–18 MeV using stacked-target activation Open

Ryan K. Chapman, Andrew S. Voyles, N. Gharibyan, L. A. Bernstein, James E. Bevins · 2021

Characterization of a boron-loaded deuterated liquid scintillator for fast and thermal neutron detection Open

Bryan V. Egner, M. Febbraro, James E. Bevins · 2021

AN ASSESSMENT OF THE SPATIAL VARIATION OF ISOTOPIC RATIOS IN A CANDU REACTOR FOR NUCLEAR TREATY MONITORING Open

Aaron W. Burkhardt, James E. Bevins, Stephen H. Baxter · 2021

A 3-D Quarter-Core CANDU-6 is modeled using Serpent 2 for nuclear treaty monitoring. The spatial variation of flux spectra and isotopic concentrations is analyzed to determine the potential isotopic distribution of key radionuclides from s…

Comparative scintillation performance of EJ-309, EJ-276, and a novel organic glass Open

T. A. Laplace, B. L. Goldblum, James E. Bevins, D. L. Bleuel, Edith Bourret , et al. · 2020

An organic glass scintillator developed by Sandia National Laboratories was characterized in terms of its light output and pulse shape discrimination (PSD) properties and compared to commercial liquid (EJ-309) and plastic (EJ-276) organic …

Comparative scintillation performance of EJ-309, EJ-276, and a novel organic glass Open

T. A. Laplace, B. L. Goldblum, J. Manfredi, Joshua Brown, Joseph S. Carlson , et al. · 2020

An organic glass scintillator developed by Sandia National Laboratories was characterized in terms of its light output and pulse shape discrimination (PSD) properties and compared to commercial liquid (EJ-309) and plastic (EJ-276) organic …

Maximum likelihood reconstructions for rotating scatter mask imaging Open

Robert J. Olesen, Darren E. Holland, E. Brubaker, James E. Bevins · 2020

Nuclear Data Covariance Analysis in Radiation-Transport Simulations Utilizing SCALE Sampler and the IRDFF Nuclear Data Library Open

Nicholas J. Quartemont, Abigail A. Bickley, James E. Bevins · 2020

This article describes the nuclear data covariance analysis of an experimental design for a neutron energy-tuning assembly (ETA) created to shape a 14-MeV neutron point source to an objective spectrum. Underlying nuclear data uncertainties…

The nuclear network: multiplex network analysis for interconnected systems Open

B. L. Goldblum, Andrew W. Reddie, Thomas C. Hickey, James E. Bevins, Sarah Laderman , et al. · 2019

Performance evaluation of an energy tuning assembly for neutron spectral shaping Open

James E. Bevins, Z. W. Sweger, Naseem A. Munshi, B. L. Goldblum, J. A. Brown , et al. · 2019

Characterization of novel rotating scatter mask designs for gamma direction identification Open

Robert J. Olesen, Buckley E. O’Day, Darren E. Holland, Larry W. Burggraf, James E. Bevins · 2018

Gnowee: A Hybrid Metaheuristic Optimization Algorithm for Constrained, Black Box, Combinatorial Mixed-Integer Design Open

James E. Bevins, Rachel Slaybaugh · 2018

This paper introduces Gnowee, a modular, Python-based, open-source hybrid metaheuristic optimization algorithm (Available from https://github.com/SlaybaughLab/Gnowee). Gnowee is designed for rapid convergence to nearly globally optimum sol…

Rotating scatter mask optimization for gamma source direction identification Open

Darren E. Holland, James E. Bevins, Larry W. Burggraf, Buckley E. O’Day · 2018

Gnowee: A Hybrid Metaheuristic Optimization Algorithm for Constrained,\n Black Box, Combinatorial Mixed-Integer Design Open

James E. Bevins, Rachel Slaybaugh · 2018

This paper introduces Gnowee, a modular, Python-based, open-source hybrid\nmetaheuristic optimization algorithm (Available from\nhttps://github.com/SlaybaughLab/Gnowee). Gnowee is designed for rapid\nconvergence to nearly globally optimum …

A framework for assessing alternate proliferation pathways in the age of non-state actors Open

James E. Bevins, Sarah Laderman, B. L. Goldblum, Elie Katzenson, James Kendrick , et al. · 2018

While the nonproliferation community has long acknowledged the possibility of nuclear terrorism, its prevention has become a central focus area in recent years. For decades it has been assumed that, with access to special nuclear material …

Neutron Spectroscopy for pulsed beams with frame overlap using a double time-of-flight technique Open

K.P. Harrig, B. L. Goldblum, J. A. Brown, D. L. Bleuel, L. A. Bernstein , et al. · 2017

The 88-Inch Cyclotron: A one-stop facility for electronics radiation and detector testing Open

M. Kireeff Covo, Robert A. Albright, B. Ninemire, Michael Johnson, A. Hodgkinson , et al. · 2017

Targeted Modification of Neutron Energy Spectra for National Security Applications Open

James E. Bevins · 2017

At its core, research represents an attempt to break from the "this is the way we have always done it" paradigm. This idea is evidenced from the start in this research effort by the problem formulation to develop a new way to generate synt…

Magnetic moment and lifetime measurements of Coulomb-excited states in Open

N. Benczer-Koller, G. Kumbartzki, K.‐H. Speidel, D. A. Torres, S. J. Q. Robinson , et al. · 2016

The Cd isotopes are well studied, but experimental data for the rare isotopes are sparse. At energies above the Coulomb barrier, higher states become accessible. Remeasure and supplement existing lifetimes and magnetic moments of low-lying…

core stability infrom magnetic-moment and lifetime measurements Open

G. Kumbartzki, N. Benczer-Koller, K.‐H. Speidel, D. A. Torres, J. M. Allmond , et al. · 2016

In this study, the structure of the semimagic Sn50 isotopes were previously studied via measurements of B(E2;2₁⁺ → 0₁⁺) and g factors of 2₁⁺ states. The values of the B(E2;2…

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