Abstract

Absolute coincidence cross sections were measured for the reactions 6Li + 6Li → 3α, 6Li( 6Li, 2α), and 6Li ( 6Li, 2d), where the latter two represent N- body (N ≧ 4) final states. Broad peaks from the 6Li ( 6Li, 2α) reaction are well described by a double spectator pole (DSP) model utilizing a Hulthén wave function, whereas near 40 MeV the DSP peaks are much narrower than predicted. A broad peak in the 3α final-state spectrum, attributed to a single-spectator pole (SSP) process, is well described with the same wave function. The SSP is the principal mechanism for the 3α reaction, in contrast to data near 40 MeV which show that sequential decay from 8Be levels is dominant.

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