“…Detectors have been constructed that can efficiently indicate the presence ofa K+ [24,25]. Astbury et al [24] have built a detector consisting of 17 alternating layers of brass and scintillator. The range -energy relations show that for particles with p :s;;; 600 MeV/c, jland 7C+ have a much greater range than K+ and p. Thus, by using the proper amount of brass absorber, K+ and p will stop in the detector.…”