Phys.Rev. C 99, 044316 (2019)

J.Refsgaard, J.Buscher, A.Arokiaraj, H.O.U.Fynbo, R.Raabe, K.Riisager

Clarification of large-strength transitions in the β decay of ¹¹Be

RADIOACTIVITY ¹¹Be(β^-), (β^-α)[from Ta(p, X), E=1.4 GeV, followed by surface ionization and selection of the reaction products in the resonant ionization laser ion source (RILIS) and separation in the general purpose mass separator at ISOLDE-CERN facility]; measured β-delayed Eα and Iα using double-sided silicon strip detector for ion implantation and α detection; deduced β^--delayed α branching ratio, Gamow-Teller matrix elements, B(GT), logft, and resonant strength by R-matrix analysis of the β-delayed α spectrum. ⁷Li; deduced levels, J, π, large overlaps between the two states in ⁷Li and the ground state of ¹¹Be. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.99.044316