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.
KeywordsPrimary Beam Coincidence Spectrum Exit Window Stainless Steel Foil Beam Opening
- 1.A.A. Yukhimchuk et al., to be submitted to Nucl. Instrum. Methods.Google Scholar