New results on the halo structure of 8B
Creators
- 1. Chalmers Univ. of Technology, Goeteborg (Sweden). Inst. of Physics
Description
The longitudinal momentum distribution of 7Be fragments after fragmentation of 8B 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 8B 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. (orig.)
Availability note (English)
Available from INIS in electronic form
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Additional details
Publishing Information
- Imprint Pagination
- 14 p.
- Report number
- GSI--99-09(prepr.)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 30019750
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BERYLLIUM 7; BORON 8 REACTIONS; CARBON 12; CARBON 12 TARGET; EXPERIMENTAL DATA; GEV RANGE 10-100; INTEGRAL CROSS SECTIONS; KNOCK-OUT REACTIONS; LONGITUDINAL MOMENTUM; PROTONS; QUASI-ELASTIC SCATTERING
- Descriptors DEC
- ALKALINE EARTH ISOTOPES; BARYONS; BERYLLIUM ISOTOPES; BETA DECAY RADIOISOTOPES; CARBON ISOTOPES; CATIONS; CHARGED PARTICLES; CROSS SECTIONS; DATA; DAYS LIVING RADIOISOTOPES; DIRECT REACTIONS; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY RANGE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FERMIONS; GEV RANGE; HADRONS; HEAVY ION REACTIONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INFORMATION; IONS; ISOTOPES; LIGHT NUCLEI; LINEAR MOMENTUM; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; NUMERICAL DATA; RADIOISOTOPES; SCATTERING; STABLE ISOTOPES; TARGETS