Photodisintegration of 9Be through the 1/2+ state and cluster dipole resonance.

Photodisintegration of 9Be through the l/2+ state near neutron threshold and cluster dipole resonance below giant dipole resonance was measured with quasi-monochromatic γ-ray beams produced in the inverse Compton scattering of laser photons. The cross section for the l/2+ state is revisited, being consistent with the 2001 data. The cross section for the cluster dipole resonance is consistent with the cluster dipole sum-rule which however degenerates for the two-body (n-8Be) and three-body(n-α-α) configurations. [ABSTRACT FROM AUTHOR]