56 research outputs found
Cooler Intensity Limitations
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Development of the Techology for Intermediate Energy Electron Cooling
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Cooler Intensity Limitations
This research was sponsored by the National Science Foundation Grant NSF PHY-931478
Erratum: Measurement of d+ Be 7 cross sections for big-bang nucleosynthesis (Physical Review Letters (2019) 122 (182701) DOI: 10.1103/PhysRevLett.122.182701)
The cross sections of nuclear reactions between the radioisotope Be7 and deuterium, a possible mechanism of reducing the production of mass-7 nuclides in big-bang nucleosynthesis, were measured at center-of-mass energies between 0.2 and 1.5 MeV. The measured cross sections are dominated by the (d,a) reaction channel, towards which prior experiments were mostly insensitive. A new resonance at 0.36(5) MeV with a strength of ωγ=1.7(5) keV was observed inside the relevant Gamow window. Calculations of nucleosynthesis outcomes based on the experimental cross section show that the resonance reduces the predicted abundance of primordial Li7, but not sufficiently to solve the primordial lithium problem. (Figure Presented)
Measurement of Be cross sections for Big-Bang nucleosynthesis
The cross sections of nuclear reactions between the radioisotope Be and
deuterium, a possible mechanism of reducing the production of mass-7 nuclides
in Big-Bang nucleosynthesis, were measured at center-of-mass energies between
0.2 MeV and 1.5 MeV. The measured cross sections are dominated by the
reaction channel, towards which prior experiments were mostly
insensitive. A new resonance at 0.36(5)~MeV with a strength of =
1.7(5)~keV was observed inside the relevant Gamow window. Calculations of
nucleosynthesis outcomes based on the experimental cross section show that the
resonance reduces the predicted abundance of primordial Li, but not
sufficiently to solve the primordial lithium problem.Comment: 6 pages, 6 figure
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