A STUDY OF THE GIANT RESONANCE REGIONS OF Be8 AND C12 THROUGH THE INVERSE REACTIONS Li7(p,[gamma])Be8 AND B11(p,[gamma])C12

Author:: Gemmell, D. S.
Published:: [Place of publication not identified] : [publisher not identified], 1958.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1958.
Physical Description:: microopaque : positive ; 8 x 13 cm
Additional Creators:: Morton, A. H. and Titterton, E. W.

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Summary:

In a search for fine structure in the giant resonanpe of C/sup 12/, an experiment was carried out to determine the excitation function for the ground- state gamma rays of the reaction B/sup 11/(p, gamma )C/sup 12/ or protons in the energy range 4 to 7.7 Mev-. The measured cross sections can be related to C/sup 12/( gamma ,p)B/sup 11/ cross sections through the principle of detailed balancing. The experiment locates the maximum of the C/sup 12/( gamma ,p) giant resonance at 22:55 ( plus or minus O.l) Mev but does not resolve individual levels. The cross section curve, however, is not smooth. and two peaks at C/sup 12/ excitations of 21.4 and 22.1 Mev are suggested. The maximum value of the C/ sup 12( gamma ,p) cross section is found to be (29 gamma 5) mb. The reaction Li/sup 7/(p, gamma )Be/sup 8/ was also investigated over a simliar range of proton energies. Transitions to the 2.9-Mev level of Be/sup 8/ are found to predominate over those to thc ground state throughout the energy range. The experiment suggests that the reaction Be/sup 8/( gamma ,p)Li/sup 7/, if it could be observed, would have a cross section maximum a 22 Mev. (auth)

Report Numbers:

ANU/P-197

Other Subject(s):

Collection:

U.S. Atomic Energy Commission depository collection.

Note:

NSA number: NSA-13-004997
OSTI Identifier 4298838
Research organization: Australian National Univ. Research School of Physical Sciences, Canberra.

View MARC record | catkey: 38390188