LIP Lisboa

Measurement of Neutron Capture and Fission Cross-sections at n_TOF

by Raul Sarmento (LIP)

UTC
LIP _ Lisbon

LIP _ Lisbon

Description
Neutron cross sections are of central importance for nuclear astrophysics and nuclear technology. Accurate cross sections are requested for understanding in detail the production of heavy elements in the universe (A>60), which occur through the slow and rapid neutron-capture processes of stellar nucleosynthesis. Moreover, the design of ADS and innovative nuclear reactors, which address amongst others the issue of radioactive waste by transmutation, relies strongly on neutron-data input.

The Time-Of-Flight spectrometer at CERN is a premier facility worldwide to perform accurate measurements of neutron-induced fission and capture cross sections. It makes use of CERN's proton accelerators to create a neutron source from spallation reactions induced on a lead target. Its unique characteristics include a high instantaneous neutron flux, excellent neutron-energy resolution, low background and state-of-the-art detection and data acquisition systems.

Results from the second campaign of measurements at n_TOF (2008-2012) and their implications are overviewed. The construction of a second flight path will improve the physics capabilities of the n_TOF facility and open new opportunities for measurements relevant for basic nuclear physics.




Slides