The β-delayed particle decay of Ne has been studied via proton-γ coincidences, time-of-flight measurements and the "ratio-cut technique", allowing cleanly-separated proton and α-particle spectra to be obtained. A complete set of proton and α branching ratios for the decay of 14 excited states in F to the ground and excited states of O and N has been determined and branching ratios for the β decay of Ne to these states have been deduced. From the branching ratios, ft values and reduced Gamow-Teller matrix elements were calculated; no indication of isospin mixing in the isobaric analog state in F was observed. From the measurement of proton-γ angular correlations, combined with the selection rules for an allowed β decay, we obtain J = 1/2 for states at 8.436 and 9.450 MeV and 3/2 for the state at 10.030 MeV in F. Probabilities for the β-delayed pα decay to C through the tails of the subthreshold 7.117 and 6.917 MeV states in O have been calculated and the feasibility of using such decays to provide information about the rates for the E1 and E2 components of the C(α, γ)O reaction is discussed.
|Number of pages||33|
|Journal||Nuclear Physics A|
|Publication status||Published - 29 Jul 2002|