Fission Fragment Angular Anisotropy in Neutron-Induced Fission of ${}^{235}$U Measured with a Time Projection Chamber

Abstract

Fission fragment angular distributions can provide an important constraint on fission theory, improving predictive fission codes, and are a prerequisite for a precise ratio cross section measurement. Available anisotropy data is sparse, especially at neutron energies above 5 MeV. For the first time, a three-dimensional tracking detector is employed to study fragment emission angles and provide a direct measurement of angular anisotropy. The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has deployed the fission time projection chamber (fissionTPC) to measure nuclear data with unprecedented precision. The fission fragment anisotropy of ${}^{235}$U has been measured over a wide range of incident neutron energies from 180 keV to 200 MeV; a careful study of the systematic uncertainties complement the data.

arXiv comment10 pages, 12 figures, accepted to Physical Review C

References in corpus (5)

• Towards a More Complete and Accurate Experimental Nuclear Reaction Data Library (EXFOR): International Collaboration Between Nuclear Reaction Data Centres (NRDC)
• A Time Projection Chamber for High Accuracy and Precision Fission Cross Section Measurements
• High accuracy determination of the ${}^{238}$U/${}^{235}$U fission cross section ratio up to $\sim$1 GeV at n_TOF (CERN)
• Measurement of the normalized ${}^{238}$U(n,f)/${}^{235}$U(n,f) cross section ratio from threshold to 30 MeV with the fission Time Projection Chamber
• Performance of a MICROMEGAS-based TPC in a high-energy neutron beam

Cited by in corpus (6)

• Fission Fragment Decay Simulations with the CGMF Code
• Neutron Induced Fission Fragment Angular Distributions, Anisotropy, and Linear Momentum Transfer Measured with the NIFFTE Fission Time Projection Chamber
• Correlations Between Fission Fragment and Neutron Anisotropies in Neutron-Induced Fission
• Recoil Proton Telescopes and Parallel Plate Avalanche Counters for the ${}^{235}$U(n,f) cross section measurement relative to H(n,n)H between 10 and 450 MeV neutron energy
• Angular distribution of fragments in neutron-induced nuclear fission at energies 1-200 MeV: data, theoretical models and relevant problems
• Measurement of the ${}^{236}$U fission cross section and angular distributions of fragments from fission of ${}^{235}$U and ${}^{236}$U in the neutron energy range of 0.3-500 MeV