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We study the behavior of the fusion, break-up, reaction and elastic scattering of different projectiles on 64 Zn, at near and above barrier energies. We present fusion and elastic scattering data with the tightly bound 16 O and the stable weakly bound 6 Li, 7 Li and 9 Be projectiles. The data were analyzed by coupled channel calculations. The total fusion cross sections for these systems are not affected by the break-up process at energies above the barrier. The elastic (non-capture) break-up cross section is important at energies close and above the Coulomb barrier and increases the reaction cross sections. In addition we also show that the break-up process at near and sub-barrier energies is responsible for the vanishing of the usual threshold anomaly of the optical potential and give rise to a new type of anomaly.

We introduce a microscopic traffic model, based on kinematic behavior, which consists of a single vehicle traveling through a sequence of traffic lights that turn on and off with a specific frequency. The reconstructed function that maps the state of the vehicle from light to light displays complex behavior for certain conditions. This chaotic behavior, which arises by the discontinuous nature of the map, displays an essential ingredient in traffic patterns and could be of relevance in studying traffic situations.

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Elastic and inelastic scattering angular distributions were measured for the 16 Oϩ 64 Zn reaction at bombarding energies close to the Coulomb barrier. The experimental data were analyzed within the optical model and coupled-channel model. An extended dispersion relation of integral quantities using a Gaussian weight was applied, instead of the normal relationship. Within this frame, the optical model parameters obtained from the data are in agreement with the dispersion relation and show the threshold anomaly at energies close to the Coulomb barrier. Analysis of the inelastic scattering angular distributions leads to some indications that an inelastic threshold anomaly is beginning to develop at energies lower than the ones for which our data were taken. ͓S0556-2813͑96͒01106-5͔

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TheAg nucleus has been studied by in-beam p spectroscopy with the heavy-ion fusionevaporation reaction Mo( 8,3np) at 39 MeV. Excitation functions, p p tco-in-cidences, angular distributions, and DCOQ ratios were measured. A level scheme has been constructed and various bands have been identi6ed with characteristics similar to those in other A 100 nuclei. Total Routhian surface calculations predict prolate axially symmetric shapes with collective and noncollective character and satisfactorily account for most of the experimental results.PACS number(s): 21.10. Re, 23.20.Lv, 27.60. +j

Copper-64 (t 1/2 = 12.7 h) is a promising cancer treatment radiotherapy agent and combines positron emission tomography (PET). It was produced utilizing the 64 Ni(p,n) 64 Cu nuclear reaction channel. Natural nickel was electroplated successfully, 48 µm thick, onto a gold-coated copper backing slab. Bombardment of nickel plated target was performed with 16 MeV protons at a current of 200 µA. Copper-64 together with copper-61 was separated from Ni and other non-isotopic impurities by ion exchange chromatography. The method of separation of radiocopper has been improved.