Nuclear Data Sheets for A = 89

摘要: Abstract The evaluated experimental data are presented for 14 known nuclides of mass 89 (Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh). New on high–spin excitations available Tc and including a superdeformed structure in Tc. Fluorescence studies Y have revealed large number new levels 7–11 MeV range. two–neutron transfer Zr. direct precise measurement atomic masses K r, Mo greatly improved the Q value landscape this region. This work supersedes previous A=89 evaluation published 1998Si31, also older ones 1989Si20, 1975Ko21, M.W. Johns et al., Nuclear Data Tables A 8, 373 (1970). In spite extensive isobaric nuclei chain several deficiencies remain. identification Rh isotope remains unconfirmed. half–lives ground states Ge, As not been measured, only lower limits estimated from time–of–flight reaction arrangement, where produced identified. decay schemes Ru known, those incomplete. High–lying (neutron unbound) expected to be populated investigated. spins parities Kr largely unassigned, while few low–spin established. For little information is structures. Detailed gamma–ray 88 Sr(n, γ ) Sr reaction, but most these rays remain unassigned level scheme. Excited state nonexistent Br Rh. Zr extensively studied A=89.