One-neutron knockout reactions on proton-rich nuclei with N=16
نویسندگان
چکیده
A. Gade, D. Bazin, B. A. Brown, C. M Campbell, J. A. Church, D. C. Dinca, J. Enders,* T. Glasmacher, P. G. Hansen, Z. Hu, K. W. Kemper, W. F. Mueller, H. Olliver, B. C. Perry, L. A. Riley, B. T. Roeder, B. M. Sherrill, J. R. Terry, J. A. Tostevin, and K. L. Yurkewicz National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA Department of Physics, Florida State University, Tallahassee, Florida 32306, USA Department of Physics and Astronomy, Ursinus College, Collegeville, Pennsylvania 19426, USA Department of Physics, School of Electronics and Physical Sciences, Guildford, Surrey GU2 7XH, United Kingdom (Received 18 September 2003; published 8 March 2004)
منابع مشابه
Two-proton knockout on neutron-rich nuclei
Two-proton knockout reactions on neutron-rich nuclei [1] have been studied in inverse kinematics at intermediate energy. Strong evidence that the two-proton removal from a neutron-rich system proceeds as a direct reaction is presented, together with a preliminary theoretical discussion of the partial cross sections based on eikonal reaction theory and the many-body shell model. They show that t...
متن کاملExperimental Studies of Unbound Neutron-rich Nuclei
The three-body description of two-neutron halo nuclei relies on the two-body interactions between the constituents. In order to provide constraints on calculations devoted to 14 Be and 17 B, the neutron unbound states of 13 Be and 16 B have been investigated by one-proton knockout. The experimental techniques and results are discussed here.
متن کاملDirect evidence for the onset of intruder configurations in neutron-rich Ne isotopes
Monte Carlo shell-model calculations with the modern SDPF-M interaction successfully describe neutron-rich nuclei in the vicinity of N = 20 where normal and intruder configurations coexist at low excitation energy. We report on direct experimental evidence of the population of the 3/2− intruder state in 27Ne in the knockout of a single neutron from the ground state of 28Ne. This low-lying negat...
متن کاملDiffraction dissociation contributions to two-nucleon knockout reactions and the suppression of shell-model strength
The contributions to the cross sections of intermediate energy two-nucleon knockout reactions from events in which one nucleon is removed by the stripping (inelastic breakup) mechanism and a second by the diffraction (elastic breakup) mechanism are discussed. The small additional contributions from two-nucleon diffraction events are also estimated. The approach used combines the eikonal reactio...
متن کاملNew direct reaction: two-proton knockout from neutron-rich nuclei.
The reaction 9Be(28Mg,26Ne+gamma)X has been studied at 82 MeV/nucleon together with two similar cases, 30Mg and 34Si. Strong evidence that the reactions are direct is offered by the parallel-momentum distributions of the reaction residues and by the inclusive cross sections. The pattern of the partial cross sections for 28Mg suggests the presence of correlations. A preliminary theoretical discu...
متن کاملConstraining the neutron-proton effective mass splitting in neutron-rich matter
One of the most fundamental properties characterizing the propagation of a nucleon in nuclear medium is its effective mass[1, 2, 3]. The latter describes to leading order the effects related to the non-locality of the underlying nuclear effective interactions and the Pauli exchange effects in many-fermion systems. In neutron-rich matter, an interesting new question arises as to whether the effe...
متن کامل