Proton states in 191Ir and 193Ir populated by the (3He, d) and (α, t) reactions

Proton states in193Ir and195Ir populated via the (?) reaction

“…The intrinsic single particle pick-up cross sections O-~w(0 ) in (1) were obtained from DWBA calculations with the computer code DWUCK [19] and N is the normalization factor for these calculations. [7,17,[20][21][22]. With these parameters, the relative spectroscopic strengths obtained from the (~, t) reaction were in good agreement with those from the (3He, d) results in the studies of iridium and rhenium levels [7,20].…”

“…[7,17,[20][21][22]. With these parameters, the relative spectroscopic strengths obtained from the (~, t) reaction were in good agreement with those from the (3He, d) results in the studies of iridium and rhenium levels [7,20]. In the present work, no lower cutoff was applied to the radial integration and no non-local corrections were used.…”

“…This model seemed to work well enough to provide a labelling scheme for the bands of singleparticle character. However, it has previously been pointed out that Nilsson states are appreciably mixed with 7-vibrational states [7]. In addition to a usual Nilsson model calculation, we thus made use of the rotation-vibration model of Faessler and Greiner [13] to take into account this mixing with the 7-vibrational states, The rotation-vibration model succeeded not only in reproducing spectra and B(E2) values of even-even nuclei in this region, but also in explaining the rotational spectra of high-spin unique parity states [27] with success at least equal to that of the Davydov model [28][29].…”

“…It was therefore of interest to see whether the (t,c 0 reaction would populate some low-lying states in 193Ir of an "oblate" nature which had not previously been observed in the stripping reactions on the "prolate" osmium targets. There have been suggestions that inclusion of the 7-vibrational states is crucial to an understanding of the nature of the iridium isotopes [6,7]. In addition to the usual Nilsson model calculations, an attempt has been made in the present work to describe the properties of the states in terms of the rotationvibration model taking into account Coriolis, particle-vibration and rotation-vibration couplings.…”

“…The states in 191Ir and 193Ir have been well studied [1,2] in radioactive decay processes [3][4][5], inelastic scattering measurement [6] and proton stripping reactions [7] such as (3He, d) and (c~, t). The states seem to be interpreted fairly successfully in terms of the Nilsson model when a prolate symmetric deformation is assumed.…”