Fusion cross section measurements for the /sup 12/C + /sup 20/Ne, /sup 14/N, and /sup 14/N + /sup 10/B systems

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1982

OSTI ID:5665415

DeYoung, P A

Excitation functions for the yields of ten residual nuclides from the /sup 12/C + /sup 20/Ne reaction have been measured over the range E/sub c.m./ = 11 to 33 MeV in steps of 150 keV. The magnitude and energy dependence of the excitation functions for most partial yields, as well as for the total fusion yield, closely resemble those from the /sup 14/O + /sup 16/O system when compared at the same compound-nuclear excitation energy. The total fusion yield exhibits strong anomalies as E/sub c.m./ = 22.7 and 24.1 MeV, while the /sup 20/Ne inelastic scattering yield exhibits a strong uncorrelated structure at E/sub c.m./ = 21.1 MeV. In addition, weaker structure is seen at E/sub c.m./ = 13.6, 16.6, 18.6 and 26.3 MeV in the total fusion yield. The 24.1 resonance corresponds to a characteristic structure in the /sup 16/O + /sup 16/O reaction yields. Both structures appear at the same /sup 32/S excitation energy and are found to be correlated with the transition to a regime of limited fusion. Excitation functions for the yields of eleven residual nuclei from the /sup 14/N + /sup 14/N reaction have been measured over the range E/sub c.m./ = 7 to 25 MeV in steps of ca 250 keV. The magnitude and energy dependence of the excitation functions for the partial yields are very different from those for the /sup 12/C + /sup 16/O system. The total fusion cross section is similar to that from the /sup 12/C + /sup 16/O system when compared at the same center of mass energy but appears to saturate at an energy and magnitude which are lower than expected from previous systematics. Small, regular fluctuations can be seen in the fusion cross section at the 1 to 2% level. Excitation functions for the yields of nineteen residual nuclei from the /sup 14/N + /sup 10/B reaction have been measured over the range E/sub c.m./ = 8 to 26 MeV in steps of 250 keV.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 5665415
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BORON 10 TARGET
NITROGEN 14 REACTIONS
CARBON 12 REACTIONS
FUSION REACTIONS
NEON 20 TARGET
NITROGEN 14 TARGET
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUSION YIELD
INELASTIC SCATTERING
MEV RANGE 01-10
MEV RANGE 10-100
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ENERGY RANGE
FUNCTIONS
HEAVY ION REACTIONS
INFORMATION
MEV RANGE
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUMERICAL DATA
SCATTERING
TARGETS
YIELDS
651325* - Nuclear Properties & Reactions
A=6-19
Experimental- Nuclear Reactions & Scattering- (-1987)