Abstract
Lifetimes of excited states of 124Ba were measured by the Recoil Distance Doppler Shift (RDDS) technique. The γ-ray coincidence data were analysed by the Differential Decay Curve method (DDCM). The trend of the experimentally deduced normalized B(E2) values reveals a drop at the 8+1 state, which may be caused by structural changes in the backbending region.
Highlights
Barium isotopes are subject of considerable interest, because of a variety of structural phenomena observed in them
For each level of interest the properly normalized intensities of the shifted (Is) and unshifted (Iu) components of the deexciting transition were determined from coincidence spectra with the shifted component of a transition directly populating the state for each distance
According to the Differential Decay Curve method (DDCM), if the level of interest is populated by transition B and it is depopulated via transition A, in the special case of gating on the Doppler-shifted component of the direct feeding transition (B), the mean lifetime τ can be derived for each target-to-stopper distance by applying the following equation: τi(x) where v denotes the recoil velocity
Summary
Barium isotopes are subject of considerable interest, because of a variety of structural phenomena observed in them. In addition to high-spin phenomena, γ-bands have been observed. Their notable feature is the strong staggering of the excitation energies. At spin 10+ the ground state band of 124Ba splits into two bands due to alignment of a pair of protons and neutrons in the h11/2 orbitals at rotational frequencies 0.37 and 0.41 MeV, respectively. Possible configurations of these bands were discussed earlier using the cranked shell model [5, 7, 8]. The X(5) model provides parameter free prediction for the level scheme and B(E2) transition strengths
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
