Abstract
An experiment has been performed utilising the ^{12}C(^{7}Li,p)^{18}O reaction to populate high-energy states in ^{18}O. Using the Munich Q3D magnetic spectrograph in conjunction with the Birmingham large-angular-coverage DSSD array, branching ratios have been measured for over fifty states in ^{18}O, investigating the alpha -decay, n-decay, 2n-decay and gamma -decay branches. In tandem, Monte-Carlo techniques have been used to identify and separate features.
Highlights
Direct measurement of branching ratios, in particular concurrent measurement of varying decay paths (i.e. α-decay, ndecay and γ -decay), can be difficult due to differing requirements for the detection of final state particles
A method presented here utilising Double-sided Silicon Strip Detectors (DSSDs) to measure charged decay products in conjunction with the Munich Q3D magnetic spectrograph and extensive Monte-Carlo simulations enables the identification of multiple decay channels
As well as the Q3D magnetic spectrograph and focal plane detector, the Birmingham large-angular-coverage DSSD array was set up in order to detect any charged products arising from the decay of 18O∗
Summary
Direct measurement of branching ratios, in particular concurrent measurement of varying decay paths (i.e. α-decay, ndecay and γ -decay), can be difficult due to differing requirements for the detection of final state particles. A method presented here utilising Double-sided Silicon Strip Detectors (DSSDs) to measure charged decay products in conjunction with the Munich Q3D magnetic spectrograph and extensive Monte-Carlo simulations enables the identification of multiple decay channels. This allows for a more complete determination of the branching ratios for the excited states. The Monte-Carlo simulations provided a way to establish the geometric efficiency of the detectors for a specific decay path, in order to calculate the total number of decays from those detected. The excitation range investigated in this work was 7 MeV to 16 MeV
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