Figure 3
(a) Angular (
O)-
O) correlations obtained from the measured
+
events (colored boxes with scale shown on right). The grey areas indicate simultaneous and sequential
emission in analogy to those shown in Fig. 2. (b) Angular
O distribution (full circles with statistical uncertainties) obtained from the data shown in panel (a) by selecting the other proton angle
within the range from 0 to 45 mrad, which corresponds to the ground state of
. The solid curve represents the Monte Carlo simulation of the detector response for
O +
with a
-decay energy of 1.35(8) MeV which agrees with the value of 1.4(1) MeV measured in Ref. [
11]. The dashed line is a sum fit to the data. The dotted curve indicates the background as explained in the text. (c) Angular
O distribution obtained from the data shown in (a) by selecting the other proton angle from 120 to 150 mrad, which corresponds to
O final-state interactions due to the ground and excited states of
. The dashed and dotted curves are the Monte Carlo simulations of the known
decays of the ground and first excited states of
with
decay energies of 1.56(13) and 2.85(4) MeV, respectively [
12]. The dash-dotted and dash-dot-dotted curves show the result of fits to the
O correlation, indicating unknown excited states in
with
decay energies of 4.9(2) and 6.4(2) MeV, respectively. The solid line is the sum fit.
Reuse & Permissions