The European Physical Journal A

http://link.springer.com/journal/10050

List of Papers (Total 372)

A cautionary tale: The Coulomb modified ANC for the 1/2+2 state in 17O

Abstract.We discuss the impact of the uncertainty (\(\pm 8\) keV) in the excitation energy of the astrophysically important 6.356 MeV \( 1/2^{+}_{2}\) state of 17O on the precision with which the Coulomb reduced ANC (\(\widetilde{C}\)) for the \( \langle {}^{17}\mathrm{O} (1/2^+_2) | {}^{13}\mathrm{C} + \alpha\rangle\) overlap can be extracted from direct reaction data. We find a...

Activation cross section and isomeric cross section ratio for the 76Ge(n,2n)75m,gGe process

Abstract.We measured neutron-induced reaction cross sections for the 76Ge(n,2n)75m,gGe reactions and their isomeric cross section ratios \(\sigma_{m}/\sigma_{g}\) at three neutron energies between 13 and 15MeV by an activation and off-line \(\gamma\)-ray spectrometric technique using the K-400 Neutron Generator at the Chinese Academy of Engineering Physics (CAEP). Ge samples and...

Heavy quarks in turbulent QCD plasmas

Abstract.The quark-gluon plasma, which is produced at an early stage of ultrarelativistic heavy-ion collisions, is expected to be initially strongly populated with chromodynamic fields. We address the question of how heavy quarks interact with such a turbulent plasma in comparison with an equilibrated one of the same energy density. For this purpose we derive a Fokker-Planck...

Hyperfine splitting in ordinary and muonic hydrogen

We provide an accurate evaluation of the two-photon exchange correction to the hyperfine splitting of S energy levels in muonic hydrogen exploiting the corresponding measurements in electronic hydrogen. The proton structure uncertainty in the calculation of \( \alpha^5\) contribution is sizably reduced.

The nucleon as a test case to calculate vector-isovector form factors at low energies

Extending a recent suggestion for hyperon form factors to the nucleon case, dispersion theory is used to relate the low-energy vector-isovector form factors of the nucleon to the pion vector form factor. The additionally required input, i.e. the pion-nucleon scattering amplitudes are determined from relativistic next-to-leading-order (NLO) baryon chiral perturbation theory...

Simulated production rates of exotic nuclei from the ion guide for neutron-induced fission at IGISOL

An investigation of the stopping efficiency of fission products, in the new ion guide designed for ion production through neutron-induced fission at IGISOL in Jyväskylä, Finland, has been conducted. Our simulations take into account the new neutron converter, enabling measurements of neutron-induced fission yields, and thereby provide estimates of the obtained yields as a...

Potential problems with interpolating fields

A potential can have features that do not reflect the dynamics of the system it describes but rather arise from the choice of interpolating fields used to define it. This is illustrated using a toy model of scattering with two coupled channels. A Bethe-Salpeter amplitude is constructed which is a mixture of the waves in the two channels. The potential derived from this has a...

Determination of lifetimes of nuclear excited states using the Recoil Distance Doppler Shift Method in combination with magnetic spectrometers

The current work presents the determination of lifetimes of nuclear excited states using the Recoil Distance Doppler Shift Method, in combination with spectrometers for ion identification, normalizing the intensity of the peaks by the ions detected in the spectrometer as a valid technique that produces results comparable to the ones obtained by the conventional shifted-to...

Evaluation of cross sections for neutron interactions with 238U in the energy region between 5 keV and 150 keV

Cross sections for neutron interactions with 238U in the energy region from 5keV to 150keV have been evaluated. Average total and capture cross sections have been derived from a least squares analysis using experimental data reported in the literature. The resulting cross sections have been parameterised in terms of average resonance parameters maintaining full consistency with...

General operator form of the non-local three-nucleon force

This paper describes a procedure to obtain the general form of the three-nucleon force. The result is an operator form where the momentum space matrix element of the three-nucleon potential is written as a linear combination of 320 isospin-spin-momentum operators and scalar functions of momenta. Any spatial and isospin rotation invariant three-nucleon force can be written in this...

AdS gravity and the scalar glueball spectrum

The scalar glueball spectrum has attracted much attention since the formulation of Quantum Chromodynamics. Different approaches give very different results for the glueball masses. We revisit the problem from the perspective of the AdS/CFT correspondence.

Correction to: Flow shapes and higher harmonics in anisotropic transverse collective flow

After publication of the paper, the authors realized that the affiliation of the fourth author (Tiberiu Esanu) was given incorrectly. Its correct version appears above. Moreover, a second funding grant was missed in the acknowledgements. We give their complete correct version below.

A neutron source for IGISOL-JYFLTRAP: Design and characterisation

A white neutron source based on the Be(p, nx) reaction for fission studies at the IGISOL-JYFLTRAP facility has been designed and tested. 30MeV protons impinge on a 5mm thick water-cooled beryllium disc. The source was designed to produce at least 1012 fast neutrons/s on a secondary fission target, in order to reach competitive production rates of fission products far from the...

Analysis of the exclusive final state npe+e- in the quasi-free np reaction

We report on the investigation of dielectron production in tagged quasi-free neutron-proton collisions by using a deuteron beam of kinetic energy 1.25GeV/u impinging on a liquid hydrogen target. Our measurements with HADES confirm a significant excess of \(e^{+}e^{-}\) pairs above the \(\pi^{0}\) mass in the exclusive channel \(dp \rightarrow npe^{+}e^{-}(p_{spect})\) as compared...

Ranking and validation of spallation models for isotopic production cross sections of heavy residua

The production cross sections of isotopically identified residual nuclei of spallation reactions induced by 136Xe projectiles at 500AMeV on hydrogen target were analyzed in a two-step model. The first stage of the reaction was described by the INCL4.6 model of an intranuclear cascade of nucleon-nucleon and pion-nucleon collisions whereas the second stage was analyzed by means of...

Prolate over oblate dominance in deformed nuclei as a consequence of the SU(3) symmetry and the Pauli principle

We show that the dominance of prolate over oblate shapes in even-even deformed nuclei can be derived from the SU(3) symmetry and the Pauli principle.

PANDORA, a new facility for interdisciplinary in-plasma physics

PANDORA, Plasmas for Astrophysics, Nuclear Decays Observation and Radiation for Archaeometry, is planned as a new facility based on a state-of-the-art plasma trap confining energetic plasma for performing interdisciplinary research in the fields of Nuclear Astrophysics, Astrophysics, Plasma Physics and Applications in Material Science and Archaeometry: the plasmas become the...

The electromagnetic Sigma-to-Lambda hyperon transition form factors at low energies

Using dispersion theory the low-energy electromagnetic form factors for the transition of a Sigma to a Lambda hyperon are related to the pion vector form factor. The additionally required input, i.e. the two-pion-Sigma-Lambda amplitudes are determined from relativistic next-to-leading-order (NLO) baryon chiral perturbation theory including the baryons from the octet and...