Structure of low-lying states ofC10,11from proton elastic and inelastic scattering

Abstract

To probe the ground state and transition densities, elastic and inelastic scattering on a proton target were measured in inverse kinematics for the unstable 10 C and 11 C nuclei at 45.3 and 40.6 MeV/nucleon, respectively. The detection of the recoil proton was performed by the MUST telescope array, in coincidence with a wall of scintillators for the quasiprojectile. The differential cross sections for elastic and inelastic scattering to the first excited states are compared to the optical model calculations performed within the framework of the microscopic nucleon-nucleus Jeukenne-Lejeune-Mahaux potential. Elastic scattering is sensitive to the matter-root-mean square radius found to be 2.42 ± 0.1 and 2.33 ± 0.1 fm, for 10,11 C, respectively. The transition densities from cluster and mean-field models are tested, and the cluster model predicts the correct order of magnitude of cross sections for the transitions of both isotopes. Using the Bohr-Mottelson prescription, a profile for the 10 C transition density from the 0 + ground to the 2 + 1 state is deduced from the data. The corresponding neutron transition matrix element is extracted: M n = 5.51 ± 1.09 fm 2 .

Reexamination ofLi6+pelastic scattering in inverse kinematics

“…For example for energies well above E proj. = 10 MeV/u, the microscopic approach of the Jeukenne, Lejeune, and Mahaux (JLM) potential was the basis for several such studies [1][2][3][4][5][6][7][8][9]. This potential was derived by Jeukenne-Lejeune-Mahaux [10] and applied in Refs.…”

“…This will be considered as a predecessor measurement to one with radioactive projectiles, such as 8 Li. The final goal, for both stable and radioactive projectiles, will be the breakup measurement, which can be easily accessible in inverse kinematics since all the ejectiles are confined at forward angles and MAGNEX is a powerful tool, capable of detecting them with good angular and energy resolutions.…”

Microscopic calculation of inelastic proton scattering off O18, Be10, Be12Kanada-En’yo1, Ogata2 2019Phys. Rev. C14050View full textAdd to dashboardCite

“…It should be commented that a similar approach of the MCC calculation with the Jeukenne-Lejeune-Mahaux (JLM) interaction [56] has been applied to the proton inelastic scattering off 10 Be and 12 Be in the earlier work by Takashina et al [11]. It was used also in continuum-discretized coupled-channels calculation for nucleon-induced breakup reactions of 6,7 Li [57-59] and 11 Li [60]. The JLM interaction is another kind of the gmatrix effective interaction that has only the direct term.…”

“…For instance, in 18 O and 48 Ca, the ratio becomes significantly larger than N/Z, which indicates the neutron dominance in the 2 + 1 excitation because of the proton shell closure. The phenomena of the shape difference and/or the neutron dominance have been suggested also in unstable nuclei such as 10 Be, 12 Be, and 16 C [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

“…In study of unstable nuclei, the neutron collectivity, i.e., the M n /M p ratio has been investigated ex-tensively with the inelastic proton scattering experiments in inverse kinematics using radioactive ion beam [3,7,9,12,[21][22][23][24][25][26][27][28][29][30][31][32]. However, the reaction analysis still contains model ambiguities, for instance, in the protonnucleus optical potentials, which are phenomenologically adjusted usually to elastic scattering cross sections but the applicability has not been well tested for inelastic scattering off exotic nuclei.…”