In-beam γ-ray and electron spectroscopy of ²⁴⁹<sup>,</sup>²⁵¹Md
Briselet, R.; Theisen, Ch; Sulignano, B.; Airiau, M.; Auranen, K.; Cox, D. M.; Dechery, F.; Drouart, A.; Favier, Z.; Gall, B.; Goigoux, T.; Grahn, T.; Greenlees, P. T.; Hauschild, K.; Herzan, A.; Herzberg, R-D; Jakobsson, U.; Julin, R.; Juutinen, S.; Konki, J.; Leino, M.; Lopez-Martens, A.; Mistry, A.; Nieminen, P.; Pakarinen, J.; Papadakis, P.; Peura, P.; Rey-Herme, E.; Rahkila, P.; Rubert, J.; Ruotsalainen, P.; Sandzelius, M.; Saren, J.; Scholey, C.; Sorri, J.; Stolze, S.; Uusitalo, J.; Vandebrouck, M.; Ward, A.; Zielinska, M.; Bally, B.; Bender, M.; Ryssens, W. (2020-07-09)
Briselet, R., Theisen, Ch., Sulignano, B., Airiau, M., Auranen, K., Cox, D. M., Déchery, F., Drouart, A., Favier, Z., Gall, B., Goigoux, T., Grahn, T., Greenlees, P. T., Hauschild, K., Herzan, A., Herzberg, R.-D., Jakobsson, U., Julin, R., Juutinen, S., … Ryssens, W. (2020). In-beam γ -ray and electron spectroscopy of Md249,251. Physical Review C, 102(1). https://doi.org/10.1103/physrevc.102.014307
© 2020 American Physical Society.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe202102175188
Tiivistelmä
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 \(g_{K}=0.69^{+0.19}_{−0.16}\) 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 Δl=Δj=3 [521]3/2⁻ and [633]7/2⁺ Nilsson orbitals were found in both ²⁴⁹,²⁵¹Md. A surprising similarity of the²⁵¹Md 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.
Kokoelmat
- Avoin saatavuus [32026]