STUDY OF SUPER HEAVY HYDROGEN NUCLEI OBTAINED IN TRANSFER REACTIONS WITH EXOTIC BEAMS AND TARGETS

摘要

Experimental study of super heavy hydrogen nuclei has been carried out using upgraded ACCULINA facility. New results about ~5H and~ 4H resonance states were obtained with the use of primary triton beam (E=19 AMeV) or ~6He secondary beam (E=25 AMe V) and liquid tritium or gas deuterium targets. As a result of investigation of the two-neutron transfer reaction ~3H(t,p)~5H two resonance states situated at 1.8+-0.1 and 2.7+- 0.1 MeV above the t+n+n decay threshold were obtained in the missing mass energy spectrum of the ~5H. In the case of ~2H(~6He,~3He)~5H reaction only one peak close to E_(5H)=1.8 MeV was clearly seen. The position and width of the ~4H resonance state, E_R<=3.3 MeV and γ~2=2.3 MeV, were deduced from the study of t+t and t+d reactions. Negative result of ~7H observation in stable state or having life time ≥3*10~(-9) s was obtained when thick liquid deuterium target was bombarded by ~8He beam (E=19.9 AMeV).