Date of Defense
Malcolm Derrick, Argonne National Laboratory
The branching ratio of π- absorption in He4 giving the reaction π- + He4 → t + n was measured for both in flight and at rest interactions. It was found that:
R (at rest) = 0.27 ± 0.02
R (in flight) = 0.27 ± 0.07
suggesting a similar mechanism for π- absorption at rest and in flight (π- momentum below 200 MeV/c). The in flight ratio differs considerably from that of π+ absorption in flight in He4, giving the charge symmetric reaction π+ + He4 → He3 + p.
Leung, Chun-Ming, "Branching Ratio of π⁻ + He⁴ → t + n" (1969). Honors Theses. 283.
Honors Thesis-Campus Only