Lifetime measurement of 22Ne(4+1) with the high-velocity coincidence DSA method

The mean life of ²²Ne(4⁺₁) has been measured by means of the high-velocity coincidence DSA method with the ⁴He(¹⁹F, pγ)²²Ne reaction. The ²²Ne recoils are slowed down in Ti, Cu, Ag and Au and the γ-ray Doppler patterns are observed with a large Ge(Li) detector at 0° in coincidence with protons. Interpretation of the patterns with recent experimental stopping powers yields $\text{τ}{}_{\mathrm{<mtext>m</mtext>}}{}^{22}\text{Ne}\text{(3.36}\text{MeV}\text{)] = 328 ± 10}\text{fs}$. The present result serves as a calibration measurement and helps to reduce uncertainties in calculated stopping powers for low-velocity DSA measurements.