Search for new phenomena in high-energy heavy ion interaction

Interactions of relativistic heavy ions in thick heavy element targets and some unresolved problems

“…12, 13, and in Table 2. The relative neutron production rate R(n/E) for thermal neutrons per 1 H, 2 H, 4 He, and 12 C ion is shown in Fig. 14 in the range of the speciˇc ion energy, He, or 12 C ion between two speciˇc energies E/A = 1.0 GeV/A and E/A = 3.7 GeV/A using the results shown in Fig. 12.…”

“…The ®2π-Cu target¯set-up consisting of two Cu disks (∅ = 8 cm, d = 1 cm) separated by 20 cm together with several in-between Cu rings for the study of wide-angle emission of energetic secondary fragments producing 24 Na. The RΘ( 24 Na) values (ratio of 24 Na activity in a downstream target and the front disk) for three different irradiations are given in the table below the drawing [4] and 72 GeV 40 Ar. Any true ®losses¯of 24 Na activities would show up as a difference deˇned as:…”

“…Transmutation yields B using 20 cm long Pb or Cu targets plus 6 cm parafˇn moderators (see Fig. 15) and irradiated in Dubna with 2 H, 4 He and 12 C ions. The neutron uence per ion was measured with La und U sensors on top of the moderator using (n, γ) reactions [28].…”