Figure 10. Experimental arrangement for the neutron-energy measurement by time-of-flight.
Encircled D indicates a delay cable, and a boxed G indicates a gate.
A series of experiments involved coincidence detection of two particles emitted from the same nuclear reaction, including measurements of the neutron energy by time-of-flight. The experimental arrangement for the latter studies is shown in Fig. 9 and the data output is explained in Fig. 10.
These included deuteron break-up in collisions with heavy nuclei [Ref.10], (p,2p) reactions [Ref.11], (p,pn), and (p,np) reactions [Ref.12],(He3,He2) reactions involving detection of unstable He2 nuclei [Ref.13], and detection of (unstable) singlet deuterons (sd) from (p,sd) reactions and measurements of their angular distributions [Ref.14].
Figure 11. Plots of Δt , difference in time of arrival of neutrons and
protons at their respective detectors, versus Ep, the energy of the proton. This is
the display on the two-dimensional pulse- height analyzer. n0 is the locus of points
corresponding to events in which the final nucleus is left in its ground state, n1,
n2, … are the same for excited states, and the line labeled γ is the
locus of (p-γ) coincident events.
