[en] We propose a simple model for the energy deposition density due to the secondary scattered electrons around the track of an incident ion in scintillator materials. The initial energies of the secondary electrons are determined by an impulse approximation and the range of an electron is assumed proportional to some power of its initial energy. At a given penetration depth, it's energy is obtained from the Thomson-Whiddington law (derivable from the Bethe equation for energy loss with the mean excitation energy decreasing linearly with electron energy). Account is taken of the important electron backscattering effect. The luminescence output is assumed proportional to the regional energy deposition density in the absence of quenching effects. A radius is assumed below which quenching predominates and the light output reaches a maximum constant value. Application of the model to experimental data from various organic and inorganic scintillator yields excellent results. A simple analytical expression for the specific luminescence (do/dx) allows easy application of the model to detector calibration

[en] The efficiency is calculated for the ⁸Be detection method of Wozniak, Jelley and Cerny involving position detectors. A development of the technique is proposed which considerably increases the detection efficiency. (auth)

No abstract available

[en] A non-relativistic Monte Carlo cascade calculation, nicknamed 'CASCADITA', is presented for collisions of heavy ions in the incident energy range 10 less than E less than 100 A MeV. The calculation is based on a simple geometrical reaction model for the primary interaction and a binary statistical decay model for the final dexcitation stage. Results of its application to various experimental distributions are shown. (Author). 7 refs, 6 figs

No abstract available

[en] Spins of three new states in ¹⁶O in the 21 to 24 MeV excitation region were observed in the ¹²C(²⁰Ne, ¹⁶O)¹⁶O reaction at incident energies between 150 and 294 MeV

[en] Emission of alpha particles after bombardment of ²³²Th by 312 MeV ¹⁶O was studied in a search for evidence for nuclear shock waves in central collisions. No shock effects were seen

[en] The situation of Mexico's main accelerators is briefly reviewed. (orig.)

[en] The ¹²C(¹⁴N,¹³N)¹³C reaction was investigated after performing a detailed optical model analysis of the elastic scattering of ¹⁴N on ¹²C

[en] The actual state of nuclear reactions with heavy ions is revised, and emphasis is taken over Mexican scientists contributions. The phenomenology observed in elastic dispersion is described according to the optical model. We also show how fission and direct reaction are the mechanisms present in the low energy reactions, while a nuclear sound barrier is associated with an intermediate energy transition, and a quark and gluon plasma formation is expected to be observed in the relativistic regime. Finally, mexican research in the field of instrumentation is described (Author)