Production of /sup 8/Li/sub 3/ fragments in interaction of 250-GeV protons with heavy emulsion nuclei

Le résumé fourni par la source

In scanning nuclear emulsions we found about 600 cases of production of /sup 8/Li/sub 3/ fragments in interaction of 250-GeV protons with heavy emulsion nuclei. Angular and energy spectra of the /sup 8/Li/sub 3/ fragments were obtained. An estimate is given of the yield of /sup 8/Li/sub 3/. The experimental data are compared with a three-parameter evaporation model. In terms of this model it is not possible to obtain quantitative agreement with the experimental data. The quantity (1/4..pi..) (E/p/sup 2/) (1/sigma/sub i/n) (dsigma/dp) (which corresponds to the quantity (E/p/sup 2/) (1/sigma/sub i/n) ( (d/sup 2/sigma/d..cap omega..dp) on the assumption of isotropy in emission of /sup 8/Li/sub 3/) is satisfactorily described by the expression A exp (-Bp/sup 2/) for values p/sup 2/> or =0.2 (GeV/c)/sup 2/. The parameters A and B are respectively A=1.28 +- 0.27 sr/sup -1/ (GeV/sup -2//c/sup -3/), B=5.93 +- 0.56 (GeV/c)/sup -2/).

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