Prompt Neutron Spectra from Tagged Photofission of 235U, 238U, and 239Pu with a Linearly Polarized 13.5 MeV Photon Beam
Abstract
The first angular differential data for prompt neutrons from photofission with a linearly polarized beam have been measured near the peak of the fission cross section for 235U, 238U and 239Pu. A set of active fission ionization chambers were used to tag fission events and isolate the prompt neutrons associated with fission by forming timing coincidences between the ionization chambers and neutron detectors. The energies of the detected neutrons were determined using time-of-flight measurements. Results are presented in units of differential neutron multiplicity as a function of angle, as well as total multiplicity. No azimuthal polarization asymmetries were observed.
This work is supported under Department of Energy Grant Numbers DE-NA0003887 and DE-FG02-97ER41033.- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DNP.SQ001F