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SUMMARY:Corrections to the eikonal description of elastic scattering and
breakup of halo nuclei
DTSTART;VALUE=DATE-TIME:20180605T061200Z
DTEND;VALUE=DATE-TIME:20180605T063000Z
DTSTAMP;VALUE=DATE-TIME:20190624T093829Z
UID:indico-contribution-11093@indico2.riken.jp
DESCRIPTION:Speakers: Chloë Hebborn (Université libre de Bruxelles)\nIn
the mid-80s\, the development of Radioactive-Ion Beam (RIB) has enabled th
e study of nuclei away from stability. Indeed\, these very short-lived nuc
lei cannot be studied through usual spectroscopic techniques but informat
ion about their structure can be deduced from reaction measurements. To co
nduct a precise analysis\, an accurate reaction model coupled to a realist
ic description of the nuclei are required. The eikonal model provides reli
able results at high enough energies\, i.e. above 60A MeV\, while having a
short computational time. Since facilities\, such as HIE-ISOLDE at CERN a
nd ReA12 at MSU\, aim to accelerate RIBs up to 10A MeV\, extending the ran
ge of validity of the eikonal model to these energies would be of great in
terest. In this work\, we study two corrections to the eikonal model in th
e framework of elastic scattering and breakup reactions of halo nuclei. Th
ese corrections improve the treatment of the Coulomb and nuclear interacti
ons during the collision. The first is based on a semi-classical approach
[1\,2] while the second combines the partial-wave expansion and the eikona
l model [3]. Considering the case of the one-neutron halo projectile 11Be
impinging on a 12C target at 10A MeV\, we show that both corrections lead
to elastic scattering cross sections in excellent agreement with full CDCC
calculations. The extension of these corrections to breakup observables s
eems\, however\, less successful. By showing the success and limitations o
f these corrections\, we pinpoint more precisely the flaws of the eikonal
approximation at low energy. This will hopefully pave the way towards a mo
re efficient correction to the eikonal model at such energies. \n\n\n[1] C
. E. Aguiar\, F. Zardi\, and A. Vitturi\, Phys. Rev. C 56\, 1511 (1997).\n
[2] C. Hebborn and P. Capel\, Phys. Rev. C 96\, 054607 (2017).\n[3] J. M.
Brooke\, J. S. Al-Khalili\, and J. A. Tostevin\, Phys. Rev. C 59\, 1560 (1
999).\n\nhttps://indico2.riken.jp/event/2536/contributions/11093/
LOCATION:Matsue Kunibiki Messe
URL:https://indico2.riken.jp/event/2536/contributions/11093/
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