In-beam γ -ray and electron spectroscopy of Md,251249
Abstract
The odd-Z 251Md nucleus was studied using combined γ -ray and conversion-electron in-beam spectroscopy. Besides the previously observed rotational band based on the [521 ] 1 /2- configuration, another rotational structure has been identified using γ -γ coincidences. The use of electron spectroscopy allowed the rotational bands to be observed over a larger rotational frequency range. Using the transition intensities that depend on the gyromagnetic factor, a [514 ] 7 /2- single-particle configuration has been inferred for this band, i.e., the ground-state band. A physical background that dominates the electron spectrum with an intensity of ≃60 % was well reproduced by simulating a set of unresolved excited bands. Moreover, a detailed analysis of the intensity profile as a function of the angular momentum provided a method for deriving the orbital gyromagnetic factor, namely gK=0 .69-0.16+0.19 for the ground-state band. The odd-Z 249Md was studied using γ -ray in-beam spectroscopy. Evidence for octupole correlations resulting from the mixing of the Δ l =Δ j =3 [521 ] 3 /2- and [633 ] 7 /2+ Nilsson orbitals were found in both Md,251249. A surprising similarity of the 251Md ground-state band transition energies with those of the excited band of 255Lr has been discussed in terms of identical bands. Skyrme-Hartree-Fock-Bogoliubov calculations were performed to investigate the origin of the similarities between these bands.
- Publication:
-
Physical Review C
- Pub Date:
- July 2020
- DOI:
- 10.1103/PhysRevC.102.014307
- arXiv:
- arXiv:2001.10235
- Bibcode:
- 2020PhRvC.102a4307B
- Keywords:
-
- Nuclear Experiment;
- Nuclear Theory
- E-Print:
- Phys. Rev. C 102, 014307 (2020)