Abstract. The total cross section of the capture reaction 2H(n, t)'y has been measured at En = 25 MeV using a deuterium gas target and a scintillation counter telescope. The resulting value o = (7.6 + 0.8)/~b is compared with existing photodisintegration data and theoretical calculations.Photodisintegration of 3H and 3He connects the initial ground state of a bound three-nucleon system with the final three-body continuum state and is thus a tool to investigate the three-body wave function in its more general aspect. The twobody photodisintegration of 3He and its inverse, radiative p-d capture, have been studied both experimentally and theoretically mainly in the low-energy region co ~< 35 MeV.
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