Exclusive quasi-deuteron absorption of pions inO16andO

Charged-particle multiplicities following pion absorption onLi6

“…The three-proton spectrum is similar, except that it is missing the peak at 280 MeV. 6 Li is sufficiently small that all possible final reaction channels with two or more protons can be easily listed: 2p 4 He, 3pt, 2p« 3 He, 2p2d y 3pnd, and Ap In. The Monte Carlo phase-space program FOWL, 28 1. (a) Summed charged-particle energy spectrum for events in which two energetic protons (T p > 18 MeV) were detected following n + absorption with 6 Li at 7^ -150 MeV.…”

“…In this Letter we present data for 150-MeV x + absorption on 6 Li. This nucleus is the lightest for which a solid target is available, and it has a well-defined shell structure which makes interpretation of the data less am-biguous than for heavier nuclei.…”

“…1(a)] or three [ Fig. 1(b)] energetic protons (7 n p >18 MeV) were detected following 7c + absorption on 6 Li at 7^ = 150 MeV. The two-proton spectrum is characterized by a peak at 280 MeV, and a second peak at 260 MeV, followed by a long tail extending to the detection threshold of 36 MeV.…”

“…This nucleus is the lightest for which a solid target is available, and it has a well-defined shell structure which makes interpretation of the data less am-biguous than for heavier nuclei. Several measurements of pion absorption on 6 Li have already been made. 5,23 " 27 All involved the detection of two coplanar protons, with detectors of relatively small solid angle, except the experiment of Yakota et al 5 which also detected neutrons.…”

“…6 Li is sufficiently small that all possible final reaction channels with two or more protons can be easily listed: 2p 4 He, 3pt, 2p« 3 He, 2p2d y 3pnd, and Ap In. The Monte Carlo phase-space program FOWL, 28 1. (a) Summed charged-particle energy spectrum for events in which two energetic protons (T p > 18 MeV) were detected following n + absorption with 6 Li at 7^ -150 MeV. (b) Summed charged-particle energy spectrum for events in which three energetic protons (r p >18 MeV) were detected following TT + absorption with 6 Li at 7" x -150 MeV.…”