Excitation ofSem77,

Photoexcitation ofOsm189andLakosi1, Tam2, Pavlicsek3 et al. 1995Phys. Rev. CSelf Cite6000View full textAdd to dashboardCite

“…Its main dimensions were described in an earlier paper [7].Metallic powder Os samples of 4.38 g mass pressed into pellet form of 20 mm diameter by 3.5 mm length, and a 1.75 g Ir metal plate of 25X 25X 0.125 mm size were irradiated in the arrangement reported previously [7], but without the pneumatic rabbit system used only there for short-lived isomers.…”

“…Resonance flux densities were determined (Table I) assuming single scattering. Allowance for double scattering [7] was included in the error estimates of the values given in the table. It is worth noting that the resonance flux densities calculated on the basis of an approximate analytical formula [7] agree with the present results within 20%.…”

“…Allowance for double scattering [7] was included in the error estimates of the values given in the table. It is worth noting that the resonance flux densities calculated on the basis of an approximate analytical formula [7] agree with the present results within 20%. The integrated isomer excitation cross sections for the AL's have also been calculated, using the available level parameters from the literature.…”

“…However, the role of the excitations of even lower energies is stressed in some applications, e.g. , in nuclear astrophysics [3] or gamma-laser research [4].Although isomer excitation by (y, y') reaction using low-energy bremsstrahlung has long been observed [5], the first photoexcitation experiments on ' Os and ' Ir by ' Cs, a source of 661.66 keV primary energy, were reported just lately [6], which was followed by the excitation of Se, Br, and ' 'Ir by the same source [7]. As a result, AL's were identified and it became possible to determine unknown level lifetimes.…”