Measurement of the T+T Neutron Spectrum Using the National Ignition Facility
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Sayre_Measurement-of-the-T.pdf
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Author(s)
Frenje, Johan A.
Gatu Johnson, Maria
Date Issued
August 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Sayre, D. B., C. R. Brune, J. A. Caggiano, V. Y. Glebov, R. Hatarik, A. D. Bacher, D. L. Bleuel, et al. “Measurement of the T+T Neutron Spectrum Using the National Ignition Facility.” Physical Review Letters 111, no. 5 (August 2013). © 2013 American Physical Society
Version
Final published version
Abstract
Neutron time-of-flight spectra from inertial confinement fusion experiments with tritium-filled targets have been measured at the National Ignition Facility. These spectra represent a significant improvement in energy resolution and statistics over previous measurements, and afford the first definitive observation of a peak resulting from sequential decay through the ground state of [superscript 5]He at low reaction energies E[subscript c.m.]≲100 keV. To describe the spectrum, we have developed an R-matrix model that accounts for interferences from fermion symmetry and intermediate states, and show these effects to be non-negligible. We also find the spectrum can be described by sequential decay through ℓ=1 states in [superscript 5]He, which differs from previous interpretations.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.052501
