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

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

2007-11-06

arxiv.org/abs/0711.0777v1

Phys.Rev.C77:035803,2008

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1103/PhysRevC.77.035803

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

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