Study of 10B by inelastic scattering of 30.3MeV protons
Description
The angular distributions of the differential cross section for the inelastic scattering of 30.3MeV protons were measured for excited states in 10B up to 6.57MeV excitation. Due to the very good energy resolution achieved (25 to 30keV FWHM), 12 cross sections have been measured generally with small statistical errors. The elastic scattering cross section was analyzed with the standard optical model and very good agreement with the data was obtained. This shows the validity of this model even for a target of mass as low as ten. The inelastic cross sections were analyzed with the collective model DWBA formalism. Very good agreement for several low-lying excited states in 10B was obtained; this may confirm the simple structure of these levels. The deformation parameters extracted are generally in agreement with a recent neutron scattering experiment but not with recently reported 3H results. The 6.57MeV level appears from calculations to have negative parity and therefore a J(π)=2- character has tentatively been assigned to this state
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
On a mesure les sections efficaces pour la diffusion inelastique de protons de 30,3MeV sur le 10B pour les niveaux jusqu'a 6,57MeV d'excitation. Grace a l'excellente resolution obtenue (25 a 30keV FWHM), on a pu mesurer 12 sections efficaces ayant en general une tres bonne precision. La diffusion elastique a ete mesuree a l'aide du modele optique et un tres bon accord avec les points experimentaux a ete obtenu. Ceci montre la validite de ce modele meme pour des noyaux legers de masse aussi faible que 10. Les sections efficaces inelastiques ont ete mesurees a l'aide du modele collectif dans le formalisme de la DWBA. De tres bons accords avec de nombreux niveaux ont ete obtenus montrant de ce fait la structure peu compliquee de ces niveaux. Les parametres de deformation extraits de ces calculs DWBA sont en bon accord avec ceux obtenus recemment par diffusion de neutrons, mais en desaccord avec de recentes mesures identiques en 3He. Le niveau inconnu a 6,57MeV apparait comme devant posseder une parite negative; on suggere pour ce niveau le caractere J(π)=2-Files
7241764.pdf
Files
(378.8 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:7b68e2f047c3692a1f9d30400bcac144
|
378.8 kB | Preview Download |
Additional details
Publishing Information
- Imprint Pagination
- 25 p.
- Report number
- ISN--75-14
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 7241764
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- BORON 10; BORON 10 TARGET; DIFFERENTIAL CROSS SECTIONS; DWBA; ENERGY LEVELS; INELASTIC SCATTERING; MEV RANGE 10-100; PROTON REACTIONS
- Descriptors DEC
- BARYON REACTIONS; BORN APPROXIMATION; BORON ISOTOPES; CROSS SECTIONS; ENERGY RANGE; HADRON REACTIONS; ISOTOPES; LIGHT NUCLEI; MEV RANGE; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; ODD-ODD NUCLEI; SCATTERING; STABLE ISOTOPES; TARGETS