Peter Karpius
A5067872283- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Superconducting and THz Device Technology
- Nuclear Materials and Properties
- Nuclear and radioactivity studies
- Particle Detector Development and Performance
- Radioactive contamination and transfer
- thermodynamics and calorimetric analyses
- Nuclear physics research studies
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Graphite, nuclear technology, radiation studies
- Radioactive element chemistry and processing
- Radioactivity and Radon Measurements
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- History and advancements in chemistry
- Quantum, superfluid, helium dynamics
- Advanced X-ray and CT Imaging
- Superconductivity in MgB2 and Alloys
- Mining Techniques and Economics
Los Alamos National Laboratory
2010-2021
University of New Hampshire
2007-2017
University of New Hampshire at Manchester
2008-2011
We report the first precision measurement of proton electric to magnetic form factor ratio from spin-dependent elastic scattering longitudinally polarized electrons a hydrogen internal gas target. The was performed at MIT-Bates South Hall Ring over range four-momentum transfer squared Q2 0.15 0.65 (GeV/c)(2). Significantly improved results on and factors are obtained in combination with existing cross-section data electron-proton same region.
We report new measurements of the neutron charge form factor at low momentum transfer using quasielastic electrodisintegration deuteron. Longitudinally polarized electrons an energy 850 MeV were scattered from isotopically pure, highly deuterium gas target. The and coincident neutrons measured by Bates Large Acceptance Spectrometer Toroid (BLAST) detector. ratio GEn/GMn was extracted beam-target vector asymmetry AedV four-momentum transfers Q2=0.14, 0.20, 0.29, 0.42 (GeV/c)2.Received 26...
We discuss recent developments in using cryogenic microcalorimeter detectors for x- and gamma-ray spectroscopy. are currently operating a detector array consisting of thirteen pixels with time-domain multiplexed readout. With single pixel from this detector, we have measured 97.43-keV gamma rays 153-Gd 22-eV resolution (FWHM). also made the first measurements plutonium gamma-rays 45-eV resolution. testing 66-pixel next-generation chip. Preliminary new indicate improved energy linearity...
The roles played by mesons in the electromagnetic form factors of nucleon are explored using as a basis model containing vector with coupling to continuum together asymptotic Q2 behavior perturbative QCD. Specifically, dominance (GKex) developed E. L. Lomon is employed, it known be very successful representing existing high-quality data published date. An analysis made experimental uncertainties present when differences between GKex and expanded orthonormal functions. A main motivation for...
We report a precision measurement of the deuteron tensor analyzing powers T(20) and T(21) at MIT-Bates Linear Accelerator Center. Data were collected simultaneously over momentum transfer range Q=2.15-4.50 fm(-1) with Bates Large Acceptance Spectrometer Toroid using highly polarized deuterium internal gas target. The data are in excellent agreement calculations framework effective field theory. charge monopole quadrupole form factors G(C) G(Q) separated improved precision, location first...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation N. Hoteling, M. K. Bacrania, A. S. Hoover, W. Rabin, Croce, P. J. Karpius, Ullom, D. Bennett, R. Horansky, L. Vale, B. Doriese; Issues in energy calibration, nonlinearity, signal processing for gamma‐ray microcalorimeter detectors. AIP Conference Proceedings 16 December 2009; 1185 (1): 711–714....
We present results from the largest array of gamma-ray microcalorimeters operated to date. The consist Mo/Cu transition-edge sensors with attached Sn absorbers. detector contains 66 pixels each an active area 2.25 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Out pixels, 55 are active, and 31 were used acquire a high statistics Pu spectrum. energy resolution best 21 was found be 120 eV FWHM. is read out using time domain SQUID...
We report the measurement of beam-vector and tensor asymmetries A_{ed}^{V} A_{d}^{T} in quasielastic (e[over →],e^{'}p) electrodisintegration deuteron at MIT-Bates Linear Accelerator Center up to missing momentum 500 MeV/c. Data were collected simultaneously over a transfer range 0.1<Q^{2}<0.5 (GeV/c)^{2} with Bates Large Acceptance Spectrometer Toroid using an internal deuterium gas target polarized sequentially both vector states. The data are compared calculations. asymmetry is found be...