Margareta Hellström
Forskare
New results on the halo structure of 8B
Författare
Summary, in English
The longitudinal momentum distribution of Be fragments after fragmentation of B and the one-proton removal cross section (σ-1p) in a carbon target were measured at 1440 MeV/u with the fragment separator FRS used as an energy-loss spectrometer. The results show a narrow momentum distribution with a FWHM value of 91 ± 5 MeV/c and a large cross-section, σ-1p = 98 ± 6 mb. Both these results support the interpretation of a spatially extended proton orbit forming a halo in the B ground state. The momentum distribution and the one-proton removal cross section are shown to be reproduced with a three-body wave function for 8B where the target is treated as a black disc in the breakup process.
Publiceringsår
1999
Språk
Engelska
Sidor
1-7
Publikation/Tidskrift/Serie
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volym
452
Issue
1-2
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Nyckelord
- Breakup reactions
- Momentum distributions
- Nuclear structure
- One-proton removal cross section
- Unstable nuclei
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0370-2693