Method for (n,γ) cross section measurements on unstable isotopes

Details Method for (n,γ) cross section measurements on unstable isotopes Method for (n,γ) cross section measurements on unstable isotopes

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..819..307w&link_type=abstract

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS: 12th International Symposium. AIP Conference Proceedings, Volume 819, pp. 30

Computer Science

2

Radiative Capture, Interaction And Reaction Cross Sections, Neutron Sources, Calorimeters, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

Branching points in the s process provide information of the stellar interior and are considered as stringent tests of stellar models. Current measurements with the time of flight (TOF) technique are limited by the available neutron fluxes which require - even under ideal circumstances - sample masses of at least several milligram. For short lived nuclei, this would imply severe backgrounds due to the activity of the sample. We propose to increase the sensitivity of the TOF method such that target masses in the microgram region can be used. This is achieved by shortening the flight path down to a few centimeters, setting up the neutron production target inside a 4π BaF2 calorimeter. Some first results of background test measurements as well as of computer simulations with GEANT are shown.

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