Neutrons from the breakup of 19C

Marqués, F. M.; Liégard, E.; Orr, N. A.; Angélique, J. C.; Axelsson, L.; Bizard, G.; Catford, W. N.; Clarke, Nicholas; Costa, G.; Freer, M.; Grévy, S.; Guillemaud‐Mueller, D.; Gyapong, G.J.; Hanappe, F.; Hansen, P. G.; Heusch, B.; Jonson, B.; Brun, C. Le; Lecolley, F.R.; Lefebvres, F.; Lewitowicz, M.; Martı́nez, G.; Mueller, A. C.; Nilsson, T.; Ninane, A.; Nyman, G.; Petersen, B.; Pougheon, F.; Riisager, K.; Saint‐Laurent, M. G.; Schutz, Y.; Smedberg, M. H.; Sorlin, O.; Stuttgé, L.; Warner, D. D.

doi:10.1016/0370-2693(96)00617-x

Cited by 69 publications

(85 citation statements)

References 36 publications

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“…The large interaction [9] and Coulomb dissociation [1] cross sections supported this assumption. The momentum distribution probed in different ways by several groups [10][11][12][13][14][15] was consistent with the halo nature and the ground-state spin 1/2 + assignment, but 3/2 + and 5/2 + spins were not completely excluded as discussed in Refs. [12,13].…”

Section: Introductionmentioning

confidence: 67%

γ-ray spectroscopy ofC19via the single-neutron knock-out reaction

et al. 2015

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Section: Introductionmentioning

confidence: 67%

γ-ray spectroscopy ofC19via the single-neutron knock-out reaction

et al. 2015

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“…[19]. The small one-neutron separation energy for 19 C, which suffers from a large uncertainty (S n = 162 ± 112 keV [20], S n = 240 ± 100 keV [21], or S n = 530 ± 130 keV [22]), could also provide important but incomplete evidence for the halo structures. The ground-state spin parity of this nucleus is not well determined experimentally.…”

Section: Introductionmentioning

confidence: 97%

Deformation, orientation, and medium effects in16,19C+Creactions

Rashdan

2012

Phys. Rev. C

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The shape, deformation, and orientation dependence as well as in-medium effects are investigated for the reaction cross sections of 16,19 C + C systems within the optical Glauber theory, which is currently used to deduce information about the structure of exotic nuclei. A density-and energy-dependent effective nucleon-nucleon reaction cross section is used locally to study in-medium effects. The projectile deformation is treated by a deformed Fermi shape with quadrupole and hexadecapole deformations, where the deformation parameters of 16 C and 19 C are calculated from the Lagrangian density of the relativistic mean-field (RMF) model. A strong prolate deformation is predicted for 16 C while a more stronger oblate shape is predicted for 19 C. Medium effects are found to be important for extracting reliable information about the nuclear densities and radii. The deformations and orientations strongly affected the reaction cross section. The difference in the reaction cross section calculated at orientation angle π/2 and at zero degree is of the order of 400 mb. The integrated reaction cross section over all orientation angles (angle average), including in-medium effects, predicted the experimental reaction cross section of 19 C + 12 C. For 16 C + 12 C the rms radius of 16 C is increased to about 7% than that predicted by the RMF model in order to predict the experimental data. This greater increase in the rms radius of 16 C, to about 3 fm, indicates a neutron halo structure for this nucleus. The deduced spherical Fermi distributions which fit the experimental data of 16,19 C + 12 C systems are in fact a prediction of the angle average cross sections.

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“…The first applications of the knockout reaction method were aimed at clarifying specific features of exotic nuclei that are otherwise well understood, such as the l assignments and spectroscopic factors for the presumed proton halo states of 26,27,28 P ͓4͔, and the spectroscopic factors linking known states in 10,11,12 Be ͓5,6,8͔, and in 13,14 B ͓7͔. In this paper we present results for the neutron-rich carbon isotopes 16,17,19 C about which much less is known.…”

Section: Introductionmentioning

confidence: 99%

Single-neutron knockout reactions: Application to the spectroscopy of16,17,19C

et al. 2001

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The structure of the neutron-rich carbon isotopes 16,17,19 C has been investigated using one-neutron knockout reactions on a 9 Be target at approximately 60 MeV/nucleon. Partial cross sections and associated momentum distributions corresponding to final states of the 15,16,18 C residues were measured and compared with predictions based on a shell-model theory and an eikonal model of the reaction mechanism. Spectroscopic factors and l-value assignments are given. The ground-state spins of 17,19 C are ϩ , respectively. It is suggested that the accepted one-neutron separation energy for the ground state of 19 C needs to be revised upwards.

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Neutrons from the breakup of 19C

Cited by 69 publications

References 36 publications

γ-ray spectroscopy ofC19via the single-neutron knock-out reaction

γ-ray spectroscopy ofC19via the single-neutron knock-out reaction

Deformation, orientation, and medium effects in16,19C+Creactions

Single-neutron knockout reactions: Application to the spectroscopy of16,17,19C

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