Lifetimes of states in 19Ne above the 15O+α breakup threshold

The O-15(alpha, gamma)Ne-19 reaction plays a role in the ignition of type I x-ray bursts on accreting neutron stars. The lifetimes of states in 19Ne above the O-15+alpha threshold of 3.53 MeV are important inputs to calculations of the astrophysical reaction rate. These levels in 19Ne were populated in the He-3(Ne-20, alpha)Ne-19 reaction at a Ne-20 beam energy of 34 MeV. The lifetimes of six states above the threshold were measured with the Doppler-shift attenuation method. The present measurements agree with previous determinations of the lifetimes of these states and in some cases are considerably more precise.