C. Cude-Woods
A5023209662- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Particle physics theoretical and experimental studies
- Astronomy and Astrophysical Research
- Space Technology and Applications
- Distributed and Parallel Computing Systems
- Advanced NMR Techniques and Applications
- Scientific Research and Discoveries
- Quantum and electron transport phenomena
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
- Neutrino Physics Research
- Advanced MRI Techniques and Applications
- Pulsars and Gravitational Waves Research
North Carolina State University
2017-2024
Los Alamos National Laboratory
2018-2024
Triangle Universities Nuclear Laboratory
2017-2022
Utah State University
2021
California Institute of Technology
2021
East Tennessee State University
2021
Indiana University Bloomington
2021
Tennessee Technological University
2021
University of Kentucky
2021
A neutron $\ensuremath{\beta}$-decay asymmetry measurement using polarized ultracold neutrons (UCN) determines the correlation between spin of and momentum decay electron. The authors extract ratio weak axial-vector to vector couplings with reduced uncertainties. This new result from first this UCN contributes a benchmark for lattice QCD calculations possibility improved precision on CKM matrix element ${V}_{u\phantom{\rule{0}{0ex}}d}$ $\ensuremath{\beta}$ decay.
The ultracold neutron (UCN) source at Los Alamos National Laboratory (LANL), which uses solid deuterium as the UCN converter and is driven by accelerator spallation neutrons, has been successfully operated for over 10 years, providing to various experiments, first production based on superthermal process. It recently undergone a major upgrade. This paper describes design performance of upgraded LANL source. Measurements cold spectrum density are presented compared Monte Carlo predictions....
It has been proposed recently that a previously unobserved neutron decay branch to dark matter particle ($\ensuremath{\chi}$) could account for the discrepancy in lifetime observed experiments use two different measurement techniques. One of possible final states discussed includes single $\ensuremath{\chi}$ along with an ${e}^{+}{e}^{\ensuremath{-}}$ pair. We data from UCNA (Ultracold Neutron Asymmetry) experiment set limits on this channel. Coincident electron-like events are detected...
In this paper, we describe a new method for measuring surviving neutrons in neutron lifetime measurements using bottled ultracold (UCN), which provides better characterization of systematic uncertainties and enables higher precision than previous measurement techniques. An active detector that can be lowered into the trap has been used to measure distribution as function height influence marginally trapped UCN on measurement. addition, have demonstrated phase-space evolution its effect
A study of the dead layer thickness and quenching factor a plastic scintillator for use in ultracold neutron (UCN) experiments is described. Alpha spectroscopy was used to determine thin surface be 630 ± 110 nm. The relative light outputs from decay 241Am Compton scattering electrons were extract Birks’ law coefficient, yielding kB value 0.087 0.003 mm/MeV, consistent with some previous reports other polystyrene-based scintillators. results these measurements are incorporated into simulation...
Protons from the Los Alamos Neutron Science Center have been used for pulsed radiography in dynamic experiments past 25 years. Pulses of protons are imaged on a scintillator, and light these images is captured by fast gated cameras. The need fast, bright scintillators has led to some compromises image quality due tiling backgrounds with totally internally reflected light. We show how large-grain scintillator screens, made using thin plastic binder, solve problems.
A new boron-coated CCD camera is described for direct detection of ultracold neutrons (UCN) through the capture reactions $^{10}$B (n,$\alpha$0$\gamma$)$^7$Li (6%) and $^{10}$B(n,$\alpha$1$\gamma$)$^7$Li (94%). The experiments, which extend earlier works using a ZnS:Ag scintillator, are based on detections neutron-capture byproducts in silicon. high position resolution, energy resolution particle ID performance scientific allows observation identification all $\alpha$, $^7$Li $\gamma$...
In this paper, we report studies of the Fermi potential and loss per bounce ultracold neutrons (UCNs) on a deuterated scintillator (Eljen-299-02D). These UCN properties enable its use in wide variety applications fundamental neutron research.
In January, 2018, Fornal and Grinstein proposed that a previously unobserved neutron decay branch to dark matter particle (χ) could account for the discrepancy in lifetime observed two different types of experiments. One possible final states discussed includes single χ along with an e + − pair. We use data from UCNA (Ultracold Neutron Asymmetry) experiment set limits on this channel. Coincident electron-like events are detected ∼ 4π acceptance using pair detectors observe volume stored...
In this paper we report studies of the Fermi potential and loss per bounce ultracold neutron (UCN) on a deuterated scintillator (Eljen-299-02D). These UCN properties enables wide variety applications in fundamental research.