engleski

Excitation functions of 6, 7Li+7Li reactions at low energies

Differential cross sections of 6, 7Li+7Li nuclear reactions have been measured at forward angles (10° and 20°), over the energy range 2.75-10.00 MeV. Detector setup consisting of two particle detector telescopes and a monitor detector has been used. Excitation functions have been obtained for low-lying residual-nucleus states. The well pronounced peak in the excitation function of 7Li(7Li, 4He)10Be(3.37 MeV, 2+) at beam energy about 8 MeV, first observed by Wyborny and Carlson in 1971 at 0°, has been observed at 10°, but is less evident at 20°. The cross sections obtained for the 7Li(7Li, 4He)10Be(g.s, 0+) reaction are about ten times smaller and seem to indicate one or more peaks at beam energy about 6 MeV. Similar structures have been observed in the spectra of the 7Li(7Li, 3H)11B reaction. Excitation functions of the 6Li+7Li reaction are structureless. The observed peaks could correspond to excited states in 14C, at excitation energies around 30 MeV. The states at similar excitations have been observed in recent experiments. This test measurement has confirmed the results obtained by Wyborny and Carlson, but decisive measurements have yet to be made.

7Li; 6Li; excitation function; low energy

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