Abstract
The β-decay of N18 has been studied using β−n and β−γ coincidence methods. The N18 ions were produced by the fragmentation of the E/A=68.8 MeV Ne22 beam on a thick beryllium target. A newly constructed neutron detector system with wide energy detection range and low-energy detection threshold was used. The 619 ± 2 ms half-life of the N18 β-decay was found to be in very good agreement with the previous measurements. Transitions to 11 β-delayed neutron emitting states in O18 have been observed with a total branching ratio of 6.98 ± 1.46%. The Gamow-Teller β-decay strengths of N18 to these levels were deduced and compared with the shell model calculations. The intensities of the strong γ-ray transitions in O18 were found to be consistent with recent work.Received 2 September 2005DOI:https://doi.org/10.1103/PhysRevC.72.064327©2005 American Physical Society
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