Investigation of t + t collisions using the ACCULINNA beam line
Recently, an environmentally safe liquid-tritium target  was installed at the radioactive beam line of the ACCULINNA  separator working with primary beams of the U-400M cyclotron. The target cell has a material thickness of 0.4 mm for tritium, a beam opening of 10 mm diameter and the entrance and exit windows closed with two pairs of 12-μm stainless steel foils. The first experiment with the target was perfomed on a primary beam of 58 MeV tritons from the U-400M cyclotron. The separator ion optics was used to select a beam having energy and angulardistribution widths of > 0.5% and > 0.5°, respectively. Being delivered to the target the triton beam with an intensity of 1 x 107 s−1 was focused in a 4-mm spot. The detection system consisted of two large-area position-sensitive Si telescopes for charged particles and a neutron wall based on 41 DEMON  modules. The parameters of the experiment were optimized in such a way that the target thickness, beam energy spread and angular resolution made comparable contributions to the overall energy resolution. As an example, the resolution of the two-neutron transfer reaction which leads to 5H formation should be about 300 keV in the scale of excitation energy of the resonance.
- 1.A.A. Yukhimchuk et al., to be submitted to Nucl. Instrum. Methods.Google Scholar