F. Humbert et al., LONGITUDINAL AND TRANSVERSE-MOMENTUM DISTRIBUTIONS OF LI-9 FRAGMENTS FROM BREAK-UP OF LI-11, Physics letters. Section B, 347(3-4), 1995, pp. 198-204
Transverse and longitudinal momentum distributions of Li-9 fragments f
rom Li-11 break-up reactions in C, Al and Pb targets have been measure
d at 280 MeV/u. The two-neutron removal cross-section was measured to
be sigma(-2n), = 0.26 +/- 0.02 b for the carbon target, sigma(-2n) = 0
.47 +/- 0.08 b for the aluminum target and sigma(-2n), = 1.9 +/- 0.4 b
for the lead target. No significant difference is observed between th
e narrow widths (FWHM approximate to 47 MeV/c) of the transverse and l
ongitudinal momentum distributions of the Li-9 fragments. The physical
implications of this are discussed.