Measurement of total reaction cross sections of exotic neutron-rich nuclei

Mittig, W.; Chouvel, J. M.; Long, Zhan Wen; Bianchi, L.; Cunsolo, A.; Fernández, Beatriz; Foti, A.; Gastebois, J.; Gillibert, A.; Grégoire, Ch.; Schutz, Y.; Stéphan, C.

doi:10.1103/physrevlett.59.1889

Cited by 172 publications

(79 citation statements)

References 8 publications

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“…Most of these, e.g. 16,17 O and 17,20 Ne, are so well resolved that a gate on ∆E 2 removes them completely. The treatment of the remaining 15 N contaminant is described in the next section.…”

Section: The Experimentsmentioning

confidence: 99%

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
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Excitation functions for total reaction cross sections, σR, were measured for the light, mainly proton-rich nuclei 6 Li, 7 Be, 10 B, 9,10,11 C, 12 N, 13,15 O, and 17 Ne incident on a Si telescope at energies between 15 and 53 MeV/nucleon. The telescope served as target, energy degrader and detector. Proton-removal cross sections, σ2p for 17 Ne and σp for most of the other projectiles, were also measured. The strong absorption model reproduces the A-dependence of σR, but not the detailed structure. Glauber multiple scattering theory and the JLM folding model provided improved descriptions of the measured σR values. rms radii, extracted from the measured σR using the optical limit of Glauber theory, are in good agreement with those obtained from high energy data. Oneproton removal reactions are described using an extended Glauber model, incorporating second order noneikonal corrections, realistic single particle densities, and spectroscopic factors from shell model calculations.

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Section: The Experimentsmentioning

confidence: 99%

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
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“…Bx, 25.70.Bc The existence of a class of light nuclei with a localized central core surrounded by a dilute "halo" of neutron matter is now well established. Evidence for these novel structures has been gained mainly from measurements of total neutron removal [1] and breakup reaction cross sections [2][3][4], particularly at high energy. We investigate to what extent complementary information can be gained from high quality elastic scattering measurements at lower energies.…”

mentioning

confidence: 99%

Elastic Scattering of Halo Nuclei

1997

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We show that under certain conditions a simple relationship exists between the elastic scattering of a composite halo nucleus and of its core from a stable target. The coupling of the elastic and projectile excitation channels is crucial to the analysis, which is particularly useful when the ratio of the halo to the core mass is small. In the case of 11 Be elastic scattering the cross section relationship is quite well satisfied. For both 11 Be and 19 C our analysis reveals a significant sensitivity of elastic scattering data to the halo size and structure. [S0031-9007(97)03995-1] PACS numbers: 25.60. Bx, 25.70.Bc The existence of a class of light nuclei with a localized central core surrounded by a dilute "halo" of neutron matter is now well established. Evidence for these novel structures has been gained mainly from measurements of total neutron removal [1] and breakup reaction cross sections [2][3][4], particularly at high energy. We investigate to what extent complementary information can be gained from high quality elastic scattering measurements at lower energies.In this Letter we show that, in certain circumstances, the elastic scattering of a halo nucleus from a stable target can give simple direct evidence for the structure of the halo. The theory makes explicit use of the characteristics of halo nuclei, namely their very small neutron separation energy and the large spatial extension of the halo, which in turn result in strong coupling between the halo ground state and low energy excitations. This coupling of the elastic and projectile excitation channels plays a crucial role in the analysis, the results of which cannot be readily understood in terms of optical or folding model approaches. In elastic scattering, the analysis is expected to be particularly useful in systems where the ratio of the halo particle mass to the core mass is small.We consider the scattering of an assumed two-body projectile nucleus, composed of a core of mass m c and a valence particle of mass m y , by a third (target) nucleus of mass m T . It is assumed that these three bodies are spinless and structureless, although these are not essential assumptions. Two key conditions must be met, however, for the subsequent development to be a useful one:(i) The interaction between the core and target (V cT ) should be effectively much stronger than that between the valence and target particles (V yT ).(ii) The relative motion of the core and valence particles is slow compared to the relative motion of the center of mass of the projectile and target, and so can be treated adiabatically, in the spirit to the work of Johnson and Soper [5].Requirement (i) places limitations on the likely regions of applicability of our model. In strong interactiondominated processes, it is likely to be most valid when the number of nucleons in the core far exceeds that of the valence body. For 11 Be elastic scattering, where this ratio is 10:1, the assumption will be seen to be a good starting point for small scattering angles. Requirement (i) could also...

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“…A typical example is the neutron halo in the nucleus 11 Li, revealed as a consequence of its very large interaction radius, deduced from the measured interaction cross sections of 11 Li with various target nuclei [1][2][3]. The halo of the nucleus extends its matter distribution to a large radius.…”

Section: Introductionmentioning

confidence: 99%

Study of¹¹Li and^10,11Be nuclei through elastic scattering and breakup reactions

Gaidarov

Lukyanov

Kadrev

et al. 2016

EPJ Web of Conferences

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Abstract. The hybrid model of the microscopic optical potential (OP) is applied to calculate the 11 Li+p,10,11 Be+p,and 10,11 Be+ 12 C elastic scattering cross sections at energies E < 100 MeV/nucleon. The OP's contain the folding-model real part (ReOP) with the direct and exchange terms included, while its imaginary part (ImOP) is derived within the high-energy approximation (HEA) theory. For the 11 Li+p elastic scattering, the microscopic large-scale shell model (LSSM) density of 11 Li is used, while the density distributions of 10,11 Be nuclei obtained within the quantum Monte Carlo (QMC) model and the generator coordinate method (GCM) are utilized to calculate the microscopic OPs and cross sections of elastic scattering of these nuclei on protons and 12 C. The depths of the real and imaginary parts of OP are fitted to the elastic scattering data, being simultaneously adjusted to reproduce the true energy dependence of the corresponding volume integrals. Also, the cluster models, in which 11 Li consists of 2n-halo and the 9 Li core having its own LSSM form of density and 11 Be consists of a n-halo and the 10 Be core, are adopted. Within the latter, we give predictions for the longitudinal momentum distributions of 9 Li fragments produced in the breakup of 11 Li at 62 MeV/nucleon on a proton target. It is shown that our results for the diffraction and stripping reaction cross sections in 11 Be scattering on 9 Be, 93 Nb, 181 Ta, and 238 U targets at 63 MeV/nucleon are in a good agreement with the available experimental data.

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Measurement of total reaction cross sections of exotic neutron-rich nuclei

Abstract: International audienc

Cited by 172 publications

References 8 publications

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
View full text Add to dashboard Cite

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
View full text Add to dashboard Cite

Elastic Scattering of Halo Nuclei

Study of¹¹Li and^10,11Be nuclei through elastic scattering and breakup reactions

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Measurement of total reaction cross sections of exotic neutron-rich nuclei

Abstract: International audienc

Cited by 172 publications

References 8 publications

Reaction and proton-removal cross sections ofLi6,Be7Warner1, Cârstoiu2, Brown3 et al. 2006Phys. Rev. C412370View full textAdd to dashboardCite

Reaction and proton-removal cross sections ofLi6,Be7Warner1, Cârstoiu2, Brown3 et al. 2006Phys. Rev. C412370View full textAdd to dashboardCite

Elastic Scattering of Halo Nuclei

Study of11Li and10,11Be nuclei through elastic scattering and breakup reactions

Contact Info

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Resources

About

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
View full text Add to dashboard Cite

Reaction and proton-removal cross sections ofLi6,Be7
Warner¹,
Cârstoiu²,
Brown³
et al. 2006
Phys. Rev. C
41
2
37
0
View full text Add to dashboard Cite

Study of¹¹Li and^10,11Be nuclei through elastic scattering and breakup reactions