0000000000623119
AUTHOR
M. Ayranov
showing 3 related works from this author
Be7(n,α)He4Reaction and the Cosmological Lithium Problem: Measurement of the Cross Section in a Wide Energy Range at n_TOF at CERN
2016
The energy-dependent cross section of the (7)Bed(n,alpha)He-4 reaction, of interest for the so-called cosmological lithium problem in big bang nucleosynthesis, has been measured for the first time from 10 meV to 10 keV neutron energy. The challenges posed by the short half-life of Be-7 and by the low reaction cross section have been overcome at n_TOF thanks to an unprecedented combination of the extremely high luminosity and good resolution of the neutron beam in the new experimental area (EAR2) of the n_TOF facility at CERN, the availability of a sufficient amount of chemically pure Be-7, and a specifically designed experimental setup. Coincidences between the two alpha particles have been…
Measurement of the Be7(n,p) cross section at thermal energy
2019
The Be7(n,p) cross section was measured with an ion-implanted Be7 target at a thermal neutron beam of the research reactor LVR-15 in Řež. The cross section to the ground state of Li7 is σ(n,p0)=43800±1400b and the cross section to the first excited state of Li7 is σ(n,p1)=520±260b.
Measurement of the 7Be(n,p) cross section at thermal energy
2019
The 7Be(n,p) cross section was measured with an ion-implanted 7Be target at a thermal neutron beam of the research reactor LVR-15 in Řež. The cross section to the ground state of 7Li is σ(n,p0)=43800±1400b and the cross section to the first excited state of 7Li is σ(n,p1)=520±260b.