Search Results (13 total)

The available experimental results on the equilibrium of the N / Z degree of freedom are recalled. New available experimental results for very asymmetric systems are presented and compared to a simple classical model including the mass diffusion, the relaxation of the neutron excess degree of freedom, and the subsequent evaporation. The agreement between this classical calculation and the experiment is shown to be satisfactory.

NUCLEAR REACTIONS ⁴⁰Ar+¹⁹⁷Au, ³²S+²³⁸U, ⁴⁰Ar+²³⁸U, ⁶³Cu+²³²Th, ⁴⁰Ar+²³²Th. Deeply inelastic reactions. Comparison of experimental distributions with a classical model.

The method of the delayed impulses has been applied to the study of the instability of the meson. The decay curve of the mesons at rest can be traced, as in the case of a radioactive element, and an evaluation of the lifetime given.

An interpretation is given for the absorption curves of cosmic rays obtained with screens of different atomic numbers. Measurements made in 1935 at the Jungfraujoch (3500 m) with lead and aluminum show the existence of an important number of mesons of relatively small energy in the soft component.

The production of multiple secondary particles by cosmic rays under thick layers of lead has been studied with coincidence counters and with a cloud chamber. Part of the coincidences obtained under 15 cm of lead is attributed to groups of particles of atmospheric origin associated with extensive showers. The other part is due to a local effect produced in the lead by single penetrating particles. Among the particles emitted in these processes, some have the penetrating power of low energy mesons.