Structure of odd–odd 136La at high spin

High spin spectroscopy of 137La

“…At this energy, both 137 La and 136 La were produced with comparable cross-sections without any visible yield from 11 B + 197 Au fusion reaction. Of these, the level scheme of 136 La has been recently reported by Bhattacharjee et al [13]. Proper care was taken to identify the γ rays, belonging to 137 La, and to exclude contribution, if there is any, from overlapping γ rays due to Coulomb excitation of 197 Au and from 136 La channel.…”

“…The DCO and polarisation matrices were generated using both "NSCSORT" and "IUCSORT" code and the results were cross-checked. The γ rays belonging to 137 La were identified by putting gates on strong known transitions [5] and by excluding the γ rays, already assigned to 136 La [13]. Figs.…”

“…We have also deduced the asymmetry ratio (R asy ) for the new and the known transitions following the Refs. [13,18] and according to the definition given below: R asy = I γ 1 at 90 • , gated by γ 2 at 60 • I γ 1 at 30 • , gated by γ 2 at 60 • . This ratio is independent of the multipolarity of the gating γ ray transition, detected at 60 • .…”

“…In Fig. 8, we have plotted the deduced IPDCO ratios against γ ray transition energies in which some of the known transitions in 136 La [13] and 137 La [7], have been included in order to demonstrate the reliability in our analysis. Some representative data are replotted against the corresponding R DCO ratios in Fig.…”

“…The coloured points, representing the known transitions in 137 La (a symbol) from Ref [7]. and those in 136 La (Q symbol) from Ref [13],. demonstrate the reliability in our analysis.…”