Do Halo Nuclei Follow Rutherford Elastic Scattering at Energies Below the Barrier? The Case of 11Li

被引：126

作者：

Cubero, M. ^{[1
,2
]}

Fernandez-Garcia, J. P. ^{[3
,4
]}

Rodriguez-Gallardo, M. ^{[3
]}

Acosta, L. ^{[5
]}

Alcorta, M. ^{[1
]}

Alvarez, M. A. G. ^{[3
,4
]}

Borge, M. J. G. ^{[1
]}

Buchmann, L. ^{[6
]}

Diget, C. A. ^{[7
]}

Al Falou, H. ^{[8
]}

Fulton, B. R. ^{[7
]}

Fynbo, H. O. U. ^{[9
]}

Galaviz, D. ^{[10
]}

Gomez-Camacho, J. ^{[3
,4
]}

Kanungo, R. ^{[8
]}

Lay, J. A. ^{[3
]}

Madurga, M.

Martel, I. ^{[5
]}

Moro, A. M. ^{[3
]}

Mukha, I. ^{[4
]}

Nilsson, T. ^{[11
]}

Sanchez-Benitez, A. M. ^{[5
]}

Shotter, A. ^{[6
,12
]}

Tengblad, O. ^{[1
]}

Walden, P. ^{[6
]}

机构：

[1] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[2] Univ Costa Rica UCR, CICANUM, San Jose, Costa Rica

[3] Univ Seville, Dept FAMN, E-41080 Seville, Spain

[4] Univ Seville, CSIC, Ctr Nacl Aceleradores, Seville 41092, Spain

[5] Univ Huelva, Dept Fis Aplicada, Huelva, Spain

[6] TRIUMF, Vancouver, BC V6T 2A3, Canada

[7] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[8] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada

[9] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark

[10] Univ Lisbon, CFNUL, P-1649003 Lisbon, Portugal

[11] Chalmers, S-41296 Gothenburg, Sweden

[12] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 26期

基金：

英国科学技术设施理事会;

关键词：

CHANNELS CALCULATIONS; COULOMB BARRIER; PB-208; HE-6; PARTICLES; MODELS; STATES; MATTER; ALPHA;

D O I：

10.1103/PhysRevLett.109.262701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first measurement of the elastic scattering of the halo nucleus Li-11 and its core Li-9 on Pb-208 at energies near the Coulomb barrier is presented. The Li-11 + Pb-208 elastic scattering shows a strong reduction with respect to the Rutherford cross section, even at energies well below the barrier and down to very small scattering angles. This drastic change of the elastic differential cross section observed in Li-11 + Pb-208 is the consequence of the halo structure of Li-11, as it is not observed in the elastic scattering of its core Li-9 at the same energies. Four-body continuum-discretized coupled-channels calculations, based on a three-body model of the Li-11 projectile, are found to explain the measured angular distributions and confirm that the observed reduction is mainly due to the strong Coulomb coupling to the dipole states in the low-lying continuum of Li-11. These calculations suggest the presence of a low-lying dipole resonance in Li-11 close to the breakup threshold. DOI: 10.1103/PhysRevLett.109.262701

引用

页数：5

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