Hi all, please see the atatched figure for theta_d vs. theta_e of
"candidates" for ed elastic events.
there is a locus for theta_e between 25 and 35 degrees. the thin line is
the calculated theta_d from theta_e. look how the locus is right on top of
the line.
it is done by coplainarity cuts and ttl-ttr>500 channels. from tof paddle
12 and below, timing of elastic deuteron is no longer distinctive from
protons. that is why the theta locus stopped at 35 degree.
however, above this angle, it seems at least from monte carlo data that
scattering angle of elastic deuterons would be distinguishable from
protons from break up channels.
Still need to look at momentum reconstruction to confirm that they are
indeed elastic deuterons.
Chi
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