Resonances and compound fluctuations in /sup 16/O(/sup 16/(O,. cap alpha. )/sup 28/Si and /sup 16/O(/sup 16/O,/sup 8/Be)/sup 24/Mg reaction cross sections

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6993639

Gay, D L

The reactions /sup 16/O(/sup 16/O,..cap alpha../sub 0.1)/sup 28/Si/sup */ and /sup 16/O(/sup 16/O,/sup 8/Be/sub 0.1)/sup 24/Mg/sup */ are studied in the energy region from E/sub c.m./ approx. = 12 to 20 MeV. Excitation functions for these reactions leading to the residual 0/sup +/ ground states and 2/sup +/ first excited states are measured in approx.50 keV steps at Theta/sub c.m./ approx. = 6.1/sup 0/ for the ..cap alpha..-particle exit channels and at Theta/sub c.m./ approx. = 1.5/sup 0/ and approx. = 5.7/sup 0/ for the /sup 8/BE channels. Angular distributions are measured at selected energies and include differential cross sections at 28 angles in the range Theta/sub c.m./ approx. = 6/sup 0/ to 91/sup 0/ for the ..cap alpha../sub 0.1/ exit channels and at 13 angles from theta/sub c.m./; approx. = 12/sup 0/ to 61/sup 0/ for the /sup 8/Be/sub 0.1/ channels. A high density of narrow, resonancelike structures (rho approx.3/MeV, Gamma < 1000 to approx.200 keV) is observed in the small-angle data. No systematic variations of the structure width and density with either energy or exit channel are apparent. Distribution-of-maxima statistical tests, applied to the small-angle data, give no evidence for nonstatistical structure in the four exit channels examined. Statistical-model calculations are used to predict the magnitudes and angular momentum dependences of the compound-nucleus components in the ..cap alpha../sub 0.1/ and /sup 8/Be/sub 0.1/ channels.

• Research Organization: Florida State Univ., Tallahassee (USA)
• OSTI ID: 6993639
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties &amp; Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
HEAVY ION REACTIONS
INFORMATION
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN 16 REACTIONS
OXYGEN 16 TARGET
RESONANCE
STATISTICAL MODELS
TARGETS