Skip to Main content Skip to Navigation
Theses

Etude des systèmes non liés 16B et 13Be

Abstract : A description of a study of the neutron-rich unbound systems 16B and 13Be is presented. The structure of these nuclei provides strong constraints on current models and vital information for a three-body description of the Borromean two-neutron halo nuclei 17B and 14Be. The experimental work was undertaken at GANIL. Single-proton removal reactions were employed to populate the nuclei of interest, starting with a secondary beam of 17C at 35 MeV/nucleon (for 16B) and 14B at 41 MeV/nucleon (for 13Be). The charged fragments were detected using a position-sensitive Si-Si-CsI telescope of the CHARISSA collaboration, and the neutron using the DéMoN modular array. The decay energy spectra for 16B and 13Be were thus reconstructed from the measured 15B-n and 12Be-n coincidences. A theoretical description, based on the sudden approximation, of the population of unbound final states was developed. The predicted decay energy spectra were compared with the measurements after folding in the response of the experimental setup. This involved the use of simulations based on GEANT and a code, BELZEBUTH, developed specifically for the present work. In the case of 15B+n the data were best reproduced assuming the population of a narrow, low-lying (about 85 keV) d-wave resonance(s). The 12Be+n data were consistent with the population of a very broad (1-2 MeV) s-wave state at around 600-800 keV and a d-wave resonance at 2.5 MeV.
Complete list of metadata

Cited literature [81 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00003117
Contributor : Jean-Luc Lecouey <>
Submitted on : Thursday, July 10, 2003 - 7:25:18 PM
Last modification on : Thursday, September 5, 2019 - 10:41:24 AM
Long-term archiving on: : Tuesday, September 11, 2012 - 9:05:24 PM

Identifiers

  • HAL Id : tel-00003117, version 1

Citation

J.L. Lecouey. Etude des systèmes non liés 16B et 13Be. Physique Nucléaire Théorique [nucl-th]. Université de Caen, 2002. Français. ⟨tel-00003117⟩

Share

Metrics

Record views

581

Files downloads

3740