Abstract:
The high intensity γ-ray source (HIγS)
utilizes intra-cavity backscattering of free
electron laser photons from the Duke electron
storage ring to produce a unique
monoenergetic beam of high-flux γ-rays with
high polarization and selectable energy
resolution. At present, γ-ray beams with
energies from 2 to 58 MeV are available with
intensities as high as 105–5 × 106 γ/s,
energy spreads of 3% or better, and nearly
100% linear polarization. The quality and
intensity of the γ-ray beams at HIγS are
responsible for the unprecedented performance
of this facility in a broad range of research
programs in nuclear structure, nuclear
astrophysics and nuclear applications. Recent
results from excitation of isomeric states in
(γ, n) reactions and parity assignments of
dipole states determined via the (γ, γ′)
reaction are presented.
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