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To undertake the study of structures by direct reaction as mentioned earlier, new instrumentation needs to be developed as a priority. The nature of the beams sent to SPIRAL2 (heavier nuclei with quite low energy) will give rise to degraded resolutions for conventional target thicknesses, even though we will be confronted with appreciably greater level densities. Our proposed answer to this challenge is to design a light particle detector with a coverage close to 4π, which can be completely integrated with new generation gamma detectors like AGATA or PARIS. The result will be a very high gain in resolution on the energy of the populated states without any big overall loss of brightness. The gamma spectroscopy of these states will also provide precious information on their nature. The IPN has a leading role in this project, called GASPARD (gamma spectroscopy and particle detection, see fig. 1). It is involved in the field of simulations, Silicon detectors, and electronic and mechanical design. This new detector must also incorporate a new type of target, such as windowless pure hydrogen targets, tritium targets, polarized targets, etc.

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Figure 1 : Preliminary design for the future GASPARD detector



Institut de Physique Nucléaire Orsay - 15 rue Georges CLEMENCEAU - 91406 ORSAY (FRANCE)
UMR 8608 - CNRS/IN2P3

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