A time projection chamber for the study of nuclear photodisintegration

A time projection chamber has been newly constructed for studying the nuclear photodisintegration reaction of a gas sample. All charged fragments from various channels of the reaction can be detected simultaneously by means of the time projection chamber with about 100% efficiency in the geometry of 4π. The assignment of these fragments to an individual reaction channel is unambiguously made using a path length, a pulse height, a track width and reaction kinematics of each of these fragments. The performance of the time projection chamber has been studied using the α-source of 241Am and the photodisintegration reaction of 4He induced by the pulsed laser-Compton backscattered photon beam.