Measurement of keV-NEUTRON Capture Cross Section of 209Bi

Details Measurement of keV-NEUTRON Capture Cross Section of 209Bi Measurement of keV-NEUTRON Capture Cross Section of 209Bi

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cgrs.conf..801s&link_type=abstract

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS. Proceedings of the Eleventh International Symposium. Held 2-6 September 2002

Computer Science

Scientific paper

The capture cross sections of 209Bi were measured in a neutron energy region from 10 to 100 keV and at 520 keV, using pulsed keV neutrons from the 7Li(p, n)7Be reaction and a time-of-flight method. The capture γ rays from a bismuth or standard gold sample were detected with a large anti-Compton NaI(Tl) spectrometer. The capture yield of the bismuth or gold sample was obtained by applying a pulse-height weighting technique to the corresponding capture γ-ray pulse-height spectrum. The derived capture cross sections from 10 to 100 keV were in good agreement with recent measurements, but that at 520 keV is about half to one third of previous measurements. This large discrepancy was ascribed to the incorrect background-subtraction in the previous measurements.

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