PIONIC FUSION STUDY OF THE HALO ANALOG STATE LI-6-ASTERISK

The isobaric analogue state of the ground state of the halo nucleus He -6, Li-6 has been studied in a pionic fusion experiment at the CELSIU S storage ring facility in Uppsala, Sweden. This was the first of two proposed experiments with the aim to study the high momentum part of t he wave functions of the halo nuclei He-6 and Li-6(0(+),T=1). The Li n uclei were produced in inverse kinematics reactions with alpha particl es incident on a deuterium cluster jet target. The Li-6 ions were dete cted in a zero-degree spectrometer situated in the fourth quadrant of the CELSIUS ring. The measurement was done for three different beam en ergies corresponding to 5.4, 2.2 and 1.5 MeV above threshold in the c. m. The cross-sections slowly increase with beam energy from 95 nb at t he lowest energy to about 250 nb at 5.4 MeV above threshold.