The Doppler Shift Attenuation Method was used to measure lifetimes for levels in K-38 at excitation energies of 1698, 2404, 2830, 2996, and 3671 keV, populated using the Ca-40(d, alpha)K-38 reaction at a beam energy of 4.5 MeV. Values of 109(29), 95(22), 457(63), 130(40), and 160(50) fs, respectively, were measured and are compared with previous values obtained using different stopping powers. The matrix element for the transition between the J(pi)=2(T=1)(+) and 0(T=1)(+) states in this T-z=0 nucleus is compared with the analogous transition in the other nuclei in the T=1 triplet, Ca-38 (T-z=-1) and Ar-38 (T-z=+1), and with the results of shell-model calculations.
|Number of pages||6|
|Journal||Physical Review C|
|Publication status||Published - Jan 2007|