The decay of the first two excited states of Ne (I=3/2, 5/2) has been studied via intermediate energy Coulomb excitation of a radioactive Ne beam on a Au target using a particle detector setup allowing a kinematically complete detection of the reaction products. Despite the first excited state being bound to single proton emission but unbound with respect to two proton emission, no evidence for a simultaneous two proton decay competing with the known γ decay of the 3/2 state could be observed. The 5/2 state decays via sequential two-proton emission to the ground state of O. The transition matrix elements B(E2,1/2→3/2 =66 e fm and B(E2,1/2→5/2) = 124(18)e fm have been deduced. From the nonobservation of the simultaneous two-proton emission of the 3/2 state a lifetime limit τ>26 ps could be deduced in agreement with recent theoretical calculations.
|Number of pages||2188182|
|Journal||Physical Review C|
|Publication status||Published - 1 Aug 2002|