J. Brudvik
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View article: ExPaNDS Testing and Validation Framework
ExPaNDS Testing and Validation Framework Open
This document presents a framework for testing and validating ExPaNDS services against reference data sets. The process is demonstrated for the case of Jupyter notebook type services.
View article: Near-threshold <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> photoproduction on the deuteron
Near-threshold photoproduction on the deuteron Open
The first experimental investigation of the near-threshold cross section for\nincoherent $\\pi^-$ photoproduction on the deuteron $\\gamma$ d -> $\\pi^-$ pp is\npresented. The experimental technique involved detection of the ~131 MeV gamma…
View article: CROSS SECTION ASYMMETRY OF THE 12C(γ,p0)11B AND 12C(γ,p1)11B REACTIONS AT PHOTON ENERGIES 40...55MeV
CROSS SECTION ASYMMETRY OF THE 12C(γ,p0)11B AND 12C(γ,p1)11B REACTIONS AT PHOTON ENERGIES 40...55MeV Open
The asymmetry of the cross section of the 12C(γ,p0)11B and 12C(γ,p1)11B reactions has been measured in the energy range 40...55MeV using linearly polarized tagged photons of the MAX-lab facility. The asymmetry of the process 12C(⃗γ,p0)11B i…
View article: Compton scattering from the deuteron above pion-production threshold
Compton scattering from the deuteron above pion-production threshold Open
The electromagnetic polarizabilities of the nucleon are fundamental nucleon-structure observables that characterize its response to external electromagnetic fields. The neutron polarizabilities can be accessed from Compton-scattering data …
View article: New results for Compton scattering on deuterium: A better determination of the neutron electromagnetic polarizabilities
New results for Compton scattering on deuterium: A better determination of the neutron electromagnetic polarizabilities Open
The electric and magnetic polarizabilities of the proton are now well known, owing to Compton scattering measurements on hydrogen targets; however, the neutron polarizabilities are still relatively uncertain, compared to the proton values.…
View article: Photoproduction of $ \pi^{0}$ -pairs off protons and off neutrons
Photoproduction of $ \pi^{0}$ -pairs off protons and off neutrons Open
Total cross sections, angular distributions, and invariant-mass distributions have been measured for the photoproduction of π0π0 pairs off free protons and off nucleons bound in the deuteron. The experiments were perf…
View article: Photoproduction of $π^0$-pairs off protons and off neutrons
Photoproduction of $π^0$-pairs off protons and off neutrons Open
Total cross sections, angular distributions, and invariant-mass distributions have been measured for the photoproduction of $π^0π^0$ pairs off free protons and off nucleons bound in the deuteron. The experiments were performed at the MAMI …
View article: Compton scattering from the deuteron below pion-production threshold
Compton scattering from the deuteron below pion-production threshold Open
Differential cross sections for elastic scattering of photons from the\ndeuteron have recently been measured at the Tagged-Photon Facility at the MAX\nIV Laboratory in Lund, Sweden. These first new measurements in more than a\ndecade furth…
View article: The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region
The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region Open
View article: The isospin structure of photoproduction of pi-eta pairs from the nucleon in the threshold region
The isospin structure of photoproduction of pi-eta pairs from the nucleon in the threshold region Open
Photoproduction of $πη$-pairs from nucleons has been investigated from threshold up to incident photon energies of $\approx$~1.4~GeV. The quasi-free reactions $γp\rightarrow pπ^0η$, $γn\rightarrow nπ^0η$, $γp\rightarrow nπ^+η$, and $γn\rig…
View article: Photoproduction of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>ω</mml:mi></mml:math>meson on the proton near threshold
Photoproduction of themeson on the proton near threshold Open
An experimental study of $\omega$ photoproduction on the proton was conducted by using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. The $\gamma p\to\omega p$ dif…
View article: A Helium Gas-Scintillator Active Target for Photoreaction Measurements
A Helium Gas-Scintillator Active Target for Photoreaction Measurements Open
A multi-cell He gas-scintillator active target, designed for the measurement of photoreaction cross sections, is described. The target has four main chambers, giving an overall thickness of 0.103 $\mathrm{g/cm^{2}}$ at an operating pressur…