Energy dependence of the cross sections for the /sup 24/Mg(/sup 16/O,/sup 12/C)/sup 28/Si(g. s. ) reaction

Journal Article · Wed May 01 00:00:00 EDT 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.1775· OSTI ID:5885306

Sanders, S J; Ernst, H; Henning, W; Jachcinski, C; Kovar, D G; Schiffer, J P; Barrette, J

Excitation functions have been measured at 0/sup 0/ and 180/sup 0/ for the /sup 24/Mg(/sup 16/O,/sup 12/C)/sup 28/Si(g.s.) reaction, and at 180/sup 0/ for the /sup 24/Mg(/sup 16/O,/sup 12/C)/sup 28/Si(2/sup +/) reaction over the energy range 36 MeV< or = E/sub c.m./< or = 54 MeV. Angular distributions were measured at E/sub c.m./ = 35.5 and 36.2 MeV where, for the latter energy, much of the angular range between 0/sup 0/ and 180/sup 0/ was covered. These data, combined with earlier measurements at lower energies, establish that the reaction cross section is strongly influenced by resonances of the compound system over a large energy range. At the higher energies, however, both the energy averaged cross section and the resonance amplitudes fall off sharply. An attempt is made to reproduce the observed structure in the /sup 28/Si(g.s.) 0/sup 0/ and 180/sup 0/ excitation functions by fitting to the data a band of Breit-Wigner resonances with an energy dependence proportional to J(J + 1). The general behavior of the 0/sup 0/ and 180/sup 0/ yield is well reproduced by this procedure, even though there are twice as many resonance poles as there are clear bumps in the data. Some regularity is evident in the resulting resonance parameters, although the fitted resonance amplitudes show greater scatter than expected for a nuclear molecular band.

• Research Organization: A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511 and Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5885306
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651425* -- Nuclear Properties &amp; Reactions
A=20-38
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
CARBON 12
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FOUR-NUCLEON TRANSFER REACTIONS
FUNCTIONS
HEAVY ION REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24 TARGET
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
OXYGEN 16 REACTIONS
RESONANCE
SILICON 28
SILICON ISOTOPES
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS