Achim Richter

TL;DR: In this article, the effect of tapering depth on various important free electron laser characteristics such as the wavelength corresponding to the peak of the spectral distribution, the spectral width, the small signal gain and the electron energy extraction efficiency has been experimentally observed.

TL;DR: The journal has elucidated all the major advances in the science of the densest phases of matter as mentioned in this paper, and has been widely cited as a seminal journal in the field of particle physics.

TL;DR: In this article, the excitation mechanism of the electric pygmy dipole resonance (PDR) was investigated in various nuclear reactions, and it was shown that the PDR states in these reactions are predominantly of transversal nature for scattering angles, being mediated by the convection and spin nuclear currents.

TL;DR: In this article, high-resolution inelastic electron and proton scattering experiments on 92Zr and 94Mo with emphasis on E2 transitions are presented, and measured form factors and angular distributions provide a measure for the F•spin purity, respectively the isovector nature, of the proposed one-phonon mixed symmetry states and furthermore provide a sensitive test of a possible two-phase character of excited 2+ states.

TL;DR: In this paper, the 4He(3He, n)6Be reaction was investigated at 36.20 MeV bombarding energy in search for a narrow resonance near the 3He-3He threshold which has been proposed as a possible explanation for the missing solar neutrinos in Davis' experiment.