Isoscalar multipole strength decomposition in 40Ca with the (e,e′α0) reaction

Giant Resonances in the Doubly Magic NucleusC48afrom the (e,Strauch1, Neumann-Cosel2, Rangacharyulu3 et al. 2000Phys. Rev. Lett.Self Cite465340View full textAdd to dashboardCite

“…A competition between direct single-particle emission from the initially excited particle-hole states and mixing into a dense background of complex multiparticle-multihole configurations is expected, but the quantitative role of both processes is not clear. Again, results in 48 Ca would be of particular interest because 48 Ca represents (besides 208 Pb) the best shell-model nucleus known.So far, experiments of the type ͑e, e 0 x͒ have mainly concentrated on charged particle emission which dominates in lighter nuclei [4][5][6][7][8][9][10][11]. The coincident detection of neutrons in the hostile environment of an electron accelerator represents a considerable experimental task, and only a few exploratory investigations have been performed [12][13][14][15][16][17].…”

Complete Spectroscopy of an Isobaric Analog Resonance with the(e,e′p)Reaction

“…The advent of new high-resolution continuous-wave electron beam facilities in nuclear research has, as one of its main purposes, to measure the excitation and deexcitation properties of nuclear levels by coincidence measurements [1]. One major success of such ͑e, e 0 x͒ experiments, where the inelastically scattered electron and the heavy particle x neutron, proton, a particle, etc., are detected, has been the ability to decompose overlapping giant resonance strength of different multipolarities, either from form factor [2][3][4][5] or from angular correlation [6][7][8][9] data. Because of the combination of an electromagnetic probe and a background-free response due to the coincidence technique the deduced strengths in terms of sum rules are the most reliable available for stringent tests of nuclear model predictions, and many discrepancies between different experiments in the literature using hadronic probes could be resolved.…”