C. R. Brune
A5047736959- Nuclear physics research studies
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Laser-Plasma Interactions and Diagnostics
- Medical Imaging Techniques and Applications
- Scientific Research and Discoveries
- Inorganic Fluorides and Related Compounds
- Superconducting Materials and Applications
Ohio University
2016-2025
Joint Institute for Nuclear Astrophysics
2016-2023
University of Notre Dame
2011-2021
Massachusetts Institute of Technology
2017-2018
University of Rochester
2017-2018
Energetics (United States)
2017-2018
Indiana University Bloomington
2017-2018
Atomic Weapons Establishment
2017-2018
General Atomics (United States)
2017-2018
Los Alamos National Laboratory
2017-2018
The ${}^{12}$C(\ensuremath{\alpha},\ensuremath{\gamma})${}^{16}$O reaction is essential for the production of carbon and oxygen in Universe, also composition stellar cores after helium burning, a key determinant supernova explosions. This review summarizes current experimental understanding, theoretical underpinning, interpretation data this critical reaction. It shown that desired level uncertainty, \ensuremath{\approx}10%, may be sight, but several inconsistencies need to overcome. Ways...
The paper describes a multilevel, multichannel $R$-matrix code, AZURE, for applications in nuclear astrophysics. code allows simultaneous analysis and extrapolation of low-energy particle scattering, capture, reaction cross sections relevance to stellar hydrogen, helium, carbon burning. presents summary theory, description, number demonstrate the applicability versatility AZURE.
The ${}^{12}\mathrm{C}(\ensuremath{\alpha},\ensuremath{\gamma}{)}^{16}\mathrm{O}$ reaction is crucial for the understanding of He burning in massive stars, but low-energy cross section highly uncertain. To address this problem we have measured at sub-Coulomb energies total sections ${}^{12}\mathrm{C}{(}^{6}\mathrm{Li},d{)}^{16}\mathrm{O}$ and ${}^{12}\mathrm{C}{(}^{7}\mathrm{Li},t{)}^{16}\mathrm{O}$ reactions to bound ${2}^{+}$ ${1}^{\ensuremath{-}}$ states ${}^{16}\mathrm{O}$. data are...
An alternative parameterization of R-matrix theory is presented which mathematically equivalent to the standard approach, but possesses features simplify fitting experimental data. In particular there are no level shifts and boundary-condition constants allows positions partial widths an arbitrary number levels be easily fixed in analysis. These parameters can converted by a straightforward matrix diagonalization procedure. addition it possible express collision directly terms parameters.
The authors evaluate the potential of a brushless doubly fed generation system for wind power applications. A 1.5 kW proof-of-concept laboratory prototype is used to investigate feasibility proposed variable-speed principle. Experimental results show that can achieve high efficiency over range speeds. efficiencies achieved at levels considered compare favorably with conventional squirrel cage induction machines. It experimentally demonstrated double achieves operation converter reduced...
Knowledge of the astrophysical rate ${}^{18}\mathrm{F}(p,\ensuremath{\alpha}{)}^{15}\mathrm{O}\mathrm{}$ reaction is important for understanding \ensuremath{\gamma}-ray emission expected from novae and heavy-element production in x-ray bursts. The this dominated at temperatures above $\ensuremath{\sim}0.4$ GK by a resonance near 7.08 MeV excitation energy ${}^{19}\mathrm{Ne}.$ ${}^{18}\mathrm{F}(p,\ensuremath{\alpha}{)}^{15}\mathrm{O}$ has been uncertain part because disagreements among...
The generation of dynamic high energy density plasmas in the pico- to nano-second time domain at high-energy laser facilities affords unprecedented nuclear science research possibilities. At National Ignition Facility (NIF), primary goal inertial confinement fusion has led synergistic development a unique brightness neutron source, sophisticated diagnostic instrumentation, and versatile experimental platforms. These novel capabilities provide new path investigate processes structural effects...
Phenomenological R -matrix has been a standard framework for the evaluation of resolved resonance cross section data in nuclear physics many years. It is powerful method comparing different types experimental and combining results measurements order to gain better estimation true underlying sections. Yet practical challenge always uncertainty on both sections at energies interest fit parameters, which can take form level parameters. Frequentist ( χ 2 -based) norm. In this work, Markov Chain...
The synthesis of heavy elements in supernovae is affected by low-energy <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mo>(</a:mo><a:mi>n</a:mi><a:mo>,</a:mo><a:mi>p</a:mi><a:mo>)</a:mo></a:mrow></a:math> and <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mo>(</b:mo><b:mi>p</b:mi><b:mo>,</b:mo><b:mi>n</b:mi><b:mo>)</b:mo></b:mrow></b:math> reactions on unstable nuclei, yet experimental data such reaction rates are scarce. SECAR (SEparator for CApture...
We discuss nuclear reactions which could play a role in Big Bang Nucleosynthesis (BBN). Most of these involve lithium and beryllium isotopes the rates for some have not previously been included BBN calculations. Few are well studied laboratory. also novel effects reactions, including thermal population target states, resonant enhancement, non-thermal neutron reaction products. perform sensitivity studies show that even given considerable physics uncertainties, most minimal leverage on...
Angular distributions of the analyzing powers ${\mathrm{iT}}_{11},$ ${T}_{20},$ and ${T}_{22}$ for ${}^{1}\mathrm{H}(d\ensuremath{\rightarrow},\ensuremath{\gamma}{)}^{3}\mathrm{He}$ at $40<~{E}_{\mathrm{c}.\mathrm{m}.}<~110$ keV angular distribution power ${A}_{y}$ ${}^{2}\mathrm{H}(p\ensuremath{\rightarrow},\ensuremath{\gamma}{)}^{3}\mathrm{He}$ $70<~{E}_{\mathrm{c}.\mathrm{m}.}<~210$ have been measured first time. In addition, absolute differential cross sections proton-deuteron capture...