In this work the sensibility behavior of a coaxial GeHP detector is presented with respect to the arrival of a colhmated radiation beam in the frontal and lateral sides ofthe detector. The results show that for a horizontal or vertical configuration of the cryostat, a preferential direction of the detection exists. From the sensibility profiles, an estimate of the sensitive dimension of the semiconductor glass of the detector was obtained.

The residual stresses and the molecular direction through a product provide the important information on how that product will behave. This is an important preoccupation in the production of plastics by the uses such as information storage. In this work a method of optional non-destructiva testing of evaluation of the quality of compact discs was evaluated and a quantitative analysis became of the state of different tension of CD's.

In this work it is presented the use of one solid state nuclear track detector, CR-39, for the determination of thermal neutron flux distribution from neutron sources, by means ofthe (n,p) nuclear reaction. Measurements of the thermal flux from an Am-Be neutron source with polyethylene and paraffin moderators were chemically etched in NaOH 6,25 N at 71 'C during 6 hours. An optical microscope 160X was used to observe the etched tracks. The flux profiles were obtained. 1t was found that polyethylene is a better moderator than paraffin for this neutron source.

The residual stresses and the molecular direction through a product provide the important information on how that product will behave. This is an important preoccupation in the production of plastics by the uses such as information storage. In this work a method of optional non-destructiva testing of evaluation of the quality of compact discs was evaluated and a quantitative analysis became of the state of different tension of CD's.