Cross sections and analyzing powers for nucleon scattering from sup 6 Li and proton scattering from sup 27 Al

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5094155

Pfuetzner, H G

Analyzing powers have been measured for neutron elastic scattering from {sup 6}Li and inelastic scattering to the first excited state of {sup 6}Li. These data were obtained in the neutron energy range of 5 to 17 MeV using the time-of-flight technique for determination of the neutron energy. A pulsed polarized deuteron beam was employed to produce a pulsed polarized neutron beam via the {sup 2}H(d,n){sup 3}He reaction. Complementary proton analyzing power data as well as cross-section data were measured in the same energy range with four pairs of silicon surface-barrier detectors. An aluminum-foil backing used with the {sup 6}Li foil target for the proton scattering measurement made it possible to simultaneously obtain analyzing power and cross-section data for {sup 27}Al. The neutron and proton scattering data obtained in this work along with previously existing neutron cross-section data were analyzed with the spherical optical model. The present optical model analyses extend a previous model describing {sup 6}Li along with several other 1-p shell nuclei but based only on cross-section data in a smaller energy range. A global optical model parameter set is presented with adequately describes neutron and proton elastic scattering data between 10 and 17 MeV. Poor quality fits were obtained below 10 MeV where resonance or compound nucleus effects occur, such effects are not accounted for by the optical mode. The present {sup 27}Al proton scattering data were combined with proton scattering data between 15 and 23 MeV and neutron scattering data between 11 and 17 MeV from the literature to form a nucleon-nucleus data set for {sup 27}Al. These data were fit with a spherical optical model. Reasonable fits were obtained above 10 MeV with deficiencies in the fits below that energy. The model fits equally well the proton and neutron data with asymmetry and Coulomb corection terms only in the real central potential.

• Research Organization: Duke Univ., Durham, NC (USA)
• OSTI ID: 5094155
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL ISOTOPES
ALUMINIUM 27
ALUMINIUM ISOTOPES
ANALYZING POWER
BEAMS
CALCULATION METHODS
DATA
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
INELASTIC SCATTERING
INFORMATION
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM ISOTOPES
MEASURING INSTRUMENTS
MEASURING METHODS
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRON BEAMS
NUCLEI
NUCLEON BEAMS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE BEAMS
SCATTERING
STABLE ISOTOPES