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Author Schiffer, J. P. ♦ Lee, L. L. (Jr.) ♦ Zeidman, B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ ANGULAR DISTRIBUTION- ANGULAR MOMENTUM- BUTLER THEORY- CAPTURE- ENERGY LEVELS- MOMENTUM- NEUTRONS- NUCLEAR MODELS- NUCLEAR REACTIONS- ORBITS- STRIPPING ♦ CONFIGURATION- ENERGY- ENERGY LEVELS- EXCITATION- NEUTRONS- NUCLEAR MODELS- RESONANCE ♦ DETECTION- DEUTERON BEAMS- ENERGY LEVELS- ENERGY RANGE- MASS- MEASURED VALUES- NEUTRONS- NUCLEAR MODELS- NUCLEAR REACTIONS- NUCLEI- PROTONS- RESOLUTION- SPECTRA- TARGETS
Abstract Systematic gross-structure peaks were observed in the proton spectra from (d,p) reactions on nuclei in the region of atomic weight 60. Measurements at deuteron energies of 4, 10, and 21.6 Mev were made with the energy resolution in the proton detectors considerably worse than the known spacing of levels in these nuclei. In all these measurements, the peaks in the proton spectra stayed at a fixed energy of the captured neutron. Angular distributions obtained with 10-Mev deuterons were analyzed in terms of the Butler theory of stripping reactions. It was found that each peak in the proton spectrum corresponded to a specific value of the orbital angular momentum of the captured neutron. The peaks are interpreted as being caused by the shellmodel single-particle states of the captured neutron, when these states are smeared out among the many actual levels of the nucleus. Thus the observed grossstructure peaks are believed to correspond to the giant resonances of the complex-potential model of Feshbach Porter, and Weisskopf. Peaks were assigned to the 1f/sub 7/2/ 2p/sub 3/2/, 1f/ sub 3/2/, 2p/sub 1/2/, 1g/sub 3/2/, 2d/sub 3/2/, 3s/sub 3/2/, and 2d/sub 3/2/ shell-model states, although these states could not all be identified in every nucleus that was studied. The relative intensities of the peaks are also consistent with this interpretation, except for the 1 = 0 peaks at high excitation energies. Information on the ground-state configurations of the target nuclei was also obtained from the intensities. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1959-07-15
Publisher Department Argonne National Lab., Lemont, Ill.
Journal Physical Review
Volume Number 115
Organization Argonne National Lab., Lemont, Ill.


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