The European Physical Journal A

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

List of Papers (Total 837)

Actinide targets for the synthesis of superheavy nuclei

The use of heavy actinide targets, including 243Am, 240,242,244Pu, 245,248Cm, 249Bk, and 249Cf, irradiated by intense heavy ion beams of 48Ca has resulted in a significant expansion of the periodic table since 2000, including the discovery of five new heaviest elements and more than 50 new isotopes. These actinide materials can only be produced by intense neutron irradiation in...

The s process in massive stars, a benchmark for neutron capture reaction rates

A clear definition of the contribution from the slow neutron-capture process (s process) to the solar abundances between Fe and the Sr-Zr region is a crucial challenge for nuclear astrophysics. Robust s-process predictions are necessary to disentangle the contribution from other stellar processes producing elements in the same mass region. Nuclear uncertainties are affecting s...

Cluster properties of heavy nuclei predicted with the Barcelona-Catania-Paris-Madrid energy density functional

We study the cluster emission properties of $$^{224}$$ Ra and $$^{238}$$ Pu employing the Barcelona-Catania-Paris-Madrid (BCPM) energy density functional (EDF). Starting from two-dimensional potential energy surfaces, coexisting fission paths are identified. A fission valley located at large octupole deformations, corresponding to a highly-asymmetric mass distribution, is found...

Lifetime measurement of the yrast 2 $$^+$$ state in $$^{118}$$ Te

The electromagnetic transition probabilities of the yrast $$2^+$$ states in the midshell Te isotopes, two protons above the closed shell at Sn, are of great importance for the understanding of nuclear collectivity in these isotopes and the role played by the neutron-proton interactions and cross-shell excitations. However, the large uncertainty of the experimental data for the...

Many-body correlations for nuclear physics across scales: from nuclei to quark-gluon plasmas to hadron distributions

It is an experimental fact that multi-particle correlations in the final states of high-energy nucleus-nucleus collisions are sensitive to collective correlations of nucleons in the wave functions of the colliding nuclei. Here, I show that this connection is more direct than it intuitively seems. With an energy deposition scheme inspired by high-energy quantum chromodynamics, and...

Study of the p–p–K $$^{+}$$ and p–p–K $$^{-}$$ dynamics using the femtoscopy technique

The interactions of kaons (K) and antikaons ( $$\mathrm {\overline{K}}$$ ) with few nucleons (N) were studied so far using kaonic atom data and measurements of kaon production and interaction yields in nuclei. Some details of the three-body KNN and $$\mathrm {\overline{K}}$$ NN dynamics are still not well understood, mainly due to the overlap with multi-nucleon interactions in...

Global comparison between experimentally measured isomeric yield ratios and nuclear model calculations

The level density steers transition probabilities between different states in the decay and de-excitation of excited nuclei. Reliable level density modelling is, therefore, key in describing, e.g., de-excitation of fission fragments, with implications on neutron and gamma-rays multiplicities, and also manifested in the population of isomeric states. We test six currently used...

Relativistic constraints on 3N contact interactions

In this paper we analyze the relativistic corrections to the leading order three-nucleon (3N) contact interactions. These boost corrections are derived first from the nonrelativistic reduction of covariant Lagrangians and later from the Poincaré algebra constraints on nonrelativistic theories. We show that in order to describe the 3N potential in reference frames other than the...

Lifetime measurement of excited states in $$^{116}$$ Xe

Lifetimes of excited states in $$^{116}$$ Xe were measured using the recoil-distance Doppler-shift technique. Excited $$^{116}$$ Xe nuclei were populated in the fusion-evaporation reaction $$^{102}$$ Pd( $$^{16}$$ O,2n) $$^{116}$$ Xe. Lifetimes of the 2 $$^+_1$$ and 4 $$^+_1$$ states were evaluated using the differential decay-curve method with $$\gamma $$ - $$\gamma...

Pionic final state interactions and the hypertriton lifetime

We analyze the contribution of pionic final state interactions (FSI) in the weak decay of the hypertriton. Focusing on the $$^3$$ He channel, we find a contribution of the pionic FSI of the order of $$18\%$$ . Assuming a fixed value for the branching ratio $$R_3$$ for the decay width into $$^3$$ He over the decay width into $$^3$$ He and pd final states, we find values for the...

Probe nuclear structure using the anisotropic flow at the Large Hadron Collider

Recent studies have shown that the shape and radial profile of the colliding nuclei have strong influences on the initial condition of the heavy ion collisions and the subsequent development of the anisotropic flow. Using A Multi-Phase Transport model (AMPT) model, we investigated the impact of nuclear quadrupole deformation $$\beta _2$$ and nuclear diffuseness $$a_0$$ of $$^{129...

Systematics of yields of strange hadrons from heavy-ion collisions around threshold energies

The parametrizations of experimental yields of K $$^{\pm ,0}$$ , $$\phi $$ and $$\Lambda +\Sigma ^0$$ are proposed as function of available energy, $$\sqrt{s_{\textrm{NN}}}$$ , and number of participants, $$\langle A_{\textrm{part}} \rangle _{\textrm{b}}$$ , for $$\sqrt{s_{\textrm{NN}}}$$ from 2.15 to 3 GeV. For all the dataset the $$\langle A_{\textrm{part}} \rangle _{\textrm{b...

Effective field theory analysis of the Coulomb breakup of the one-neutron halo nucleus $$^{19}$$ C

We analyse the Coulomb breakup of $$^{19}$$ C measured at 67A MeV at RIKEN. We use the Coulomb-Corrected Eikonal (CCE) approximation to model the reaction and describe the one-neutron halo nucleus $$^{19}$$ C within Halo Effective Field Theory (Halo EFT). At leading order we obtain a fair reproduction of the measured cross section as a function of energy and angle. The...

Production of $${^{180\textrm{m}}}$$ Hf in photoproton reaction $${^{181}}$$ Ta $$(\gamma ,p)$$ at energy $$E_{\mathrm{\gamma max}} = 35$$ –95 MeV

The production of the $$^{180\textrm{m}}\textrm{Hf}$$ nuclei in the photoproton reaction $${^{181}\textrm{Ta}}(\gamma ,p)$$ was studied at end-point bremsstrahlung energies $$E_{\mathrm{\gamma max}}=35$$ –95 MeV. The experiment was performed at the electron linear accelerator LUE-40 NSC KIPT with the use of the $$\gamma $$ activation and off-line $$\gamma $$ -ray spectroscopy...

Precision mass measurement of $$^{173}$$ Hf for nuclear structure of $$^{173}$$ Lu and the $$\gamma $$ process

We report on the precise mass measurement of the $$^{173}$$ Hf isotope performed at the Ion Guide Isotope Separator On-Line facility using the JYFLTRAP double Penning trap mass spectrometer. The new mass-excess value, $${\textrm{ME} = -55390.8(30)}$$  keV, is in agreement with the literature while being nine times more precise. The newly determined $$^{173}$$ Hf electron-capture...

Aspects of scaling and scalability for flow-based sampling of lattice QCD

Recent applications of machine-learned normalizing flows to sampling in lattice field theory suggest that such methods may be able to mitigate critical slowing down and topological freezing. However, these demonstrations have been at the scale of toy models, and it remains to be determined whether they can be applied to state-of-the-art lattice quantum chromodynamics calculations...

Measurement of the $$\gamma n\rightarrow K^0\Sigma ^0$$ differential cross section over the $$K^*$$ threshold

The differential cross section for the quasi-free photoproduction reaction $$\gamma n\rightarrow K^0\Sigma ^0$$ was measured at BGOOD at ELSA from threshold to a centre-of-mass energy of $$2400\,\hbox {MeV}$$ . Close to threshold the results are consistent with existing data and are in agreement with partial wave analysis solutions over the full measured energy range, with a...

Impact of NNLO QED corrections on lepton-proton scattering at MUSE

We present the complete next-to-next-to-leading order (NNLO) pure pointlike QED corrections to lepton-proton scattering, including three-photon-exchange contributions, and investigate their impact in the case of the MUSE experiment. These corrections are computed with no approximation regarding the energy of the emitted photons and taking into account lepton-mass effects. We...

Quantum entanglement patterns in the structure of atomic nuclei within the nuclear shell model

Quantum entanglement offers a unique perspective into the underlying structure of strongly-correlated systems such as atomic nuclei. In this paper, we use quantum information tools to analyze the structure of light and medium-mass berillyum, oxygen, neon and calcium isotopes within the nuclear shell model. We use different entanglement metrics, including single-orbital...

The Gerasimov-Drell-Hearn sum rule with nuclear targets

Hadron properties are modified when the hadron is embedded in a nuclear medium. Here we discuss the Gerasimov-Drell-Hearn, GDH, sum rule for polarised photoproduction from a polarised nucleon within a polarised nuclear target. Strong enhancement is expected with the suppression of the proton and nucleon resonance masses and enhancement of the proton’s anomalous magnetic moment in...

Measurement of polarization observables $$\textbf{T}$$ , $${\textbf{P}}$$ , and $${\textbf{H}}$$ in $$\mathbf {\pi ^0}$$ and $$\mathbf {\eta }$$ photoproduction off quasi-free nucleons

The target asymmetry T, recoil asymmetry P, and beam-target double polarization observable H were determined in exclusive $$\pi ^0$$ and $$\eta $$ photoproduction off quasi-free protons and, for the first time, off quasi-free neutrons. The experiment was performed at the electron stretcher accelerator ELSA in Bonn, Germany, with the Crystal Barrel/TAPS detector setup, using a...

Non-forward radiative corrections to electron-carbon scattering

Radiative corrections to elastic scattering represent an important part of the interpretation of electron-induced nuclear reactions at small energy transfers, where they represent a dominant part of the background. Here we present and validate a new event generator for simulating QED radiative processes in electron-carbon scattering that exactly calculates the coherent sum of the...

The electromagnetic fine-structure constant in primordial nucleosynthesis revisited

We study the dependence of the primordial nuclear abundances as a function of the electromagnetic fine-structure constant $$\alpha $$ , keeping all other fundamental constants fixed. We update the leading nuclear reaction rates, in particular the electromagnetic contribution to the neutron-proton mass difference pertinent to $$\beta $$ -decays, and go beyond certain...