{beta}-decay of the neutron-rich nucleus {sup 18}N

The {beta}-decay of {sup 18}N has been studied using {beta}-n and {beta}-{gamma} coincidence methods. The {sup 18}N ions were produced by the fragmentation of the E/A=68.8 MeV {sup 22}Ne 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 {sup 18}N {beta}-decay was found to be in very good agreement with the previous measurements. Transitions to 11 {beta}-delayed neutron emitting states in {sup 18}O have been observed with a total branching ratio of 6.98 {+-} 1.46%. The Gamow-Teller {beta}-decay strengths of {sup 18}N to these levels were deduced and compared with the shell model calculations. The intensities of the strong {gamma}-ray transitions in {sup 18}O were found to be consistent with recent work.