Neutron-induced fission fragment angular distributions, anisotropy, and linear momentum transfer measured with the NIFFTE fission time projection chamber
Abstract
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has performed measurements with a fission time projection chamber to study the fission process by reconstructing full three-dimensional tracks of fission fragments and other ionizing radiation. The amount of linear momentum imparted to the fissioning nucleus by the incident neutron can be inferred by measuring the opening angle between the fission fragments. Using this measured linear momentum, fission fragment angular distributions can be converted to the center-of-mass frame for anisotropy measurements. Angular anisotropy is an important experimental observable for understanding the quantum mechanical state of the fissioning nucleus and vital to determining detection efficiency for cross section measurements. Neutron linear momentum transfer to fissioning 235U, 238U, and 239Pu and fission fragment angular anisotropy of 235U and 238U as a function of neutron energies in the range 130 keV-250 MeV are presented.
- Publication:
-
Physical Review C
- Pub Date:
- July 2020
- DOI:
- 10.1103/PhysRevC.102.014605
- arXiv:
- arXiv:2001.09381
- Bibcode:
- 2020PhRvC.102a4605H
- Keywords:
-
- Nuclear Experiment
- E-Print:
- Phys. Rev. C 102, 014605 (2020)