Advanced search
1 file | 1.40 MB Add to list

Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes

Author
Organization
Abstract
Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po-196,Po-198,Po-200,Po-202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. In the two heaviest isotopes, Po-196,Po-198, the transitional and diagonal matrix elements of the 2(1)(+) state are determined. In Po-196,Po-198 multistep Coulomb excitation is observed, populating the 4(1)(+), 0(2)(+), and 2(2)(+) states. The experimental results are compared to the results from the measurement of mean-square charge radii in polonium isotopes, confirming the onset of deformation from Po-196 onwards. Three model descriptions are used to compare to the data. Calculations with the beyond-mean-field model, the interacting boson model, and the general Bohr Hamiltonian model show partial agreement with the experimental data. Finally, calculations with a phenomenological two-level mixing model hint at the mixing of a spherical structure with a weakly deformed rotational structure.
Keywords
CHARGE RADII, SPIN STATES, INTRUDER STATES, STATE PROPERTIES, TRANSITION-PROBABILITY, PO ISOTOPES, COULOMB-EXCITATION, EVEN-EVEN NUCLIDES, NUCLEAR-DATA SHEETS, GAMMA-RAY SPECTROSCOPY

Downloads

  • 2015-Po PRC november Po kernen.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 1.40 MB

Citation

Please use this url to cite or link to this publication:

MLA
Kesteloot, N et al. “Deformation and Mixing of Coexisting Shapes in Neutron-deficient Polonium Isotopes.” PHYSICAL REVIEW C 92.5 (2015): n. pag. Print.
APA
Kesteloot, N., Bastin, B., Gaffney, L., Wrzosek-Lipska, K., Auranen, K., Bauer, C., Bender, M., et al. (2015). Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes. PHYSICAL REVIEW C, 92(5).
Chicago author-date
Kesteloot, N, B Bastin, LP Gaffney, K Wrzosek-Lipska, K Auranen, C Bauer, M Bender, et al. 2015. “Deformation and Mixing of Coexisting Shapes in Neutron-deficient Polonium Isotopes.” Physical Review C 92 (5).
Chicago author-date (all authors)
Kesteloot, N, B Bastin, LP Gaffney, K Wrzosek-Lipska, K Auranen, C Bauer, M Bender, V Bildstein, A Blazhev, S Bönig, N Bree, E Clément, TE Cocolios, A Damyanova, I Darby, H De Witte, D Di Julio, J Diriken, C Fransen, JE García-Ramos, R Gernhäuser, T Grahn, P-H Heenen, H Hess, Kristiaan Heyde, M Huyse, J Iwanicki, U Jakobsson, J Konki, T Kröll, B Laurent, N Lecesne, R Lutter, J Pakarinen, P Peura, E Piselli, L Próchniak, P Rahkila, E Rapisarda, P Reiter, M Scheck, M Seidlitz, M Sferrazza, B Siebeck, M Sjodin, H Tornqvist, E Traykov, J Van De Walle, P Van Duppen, M Vermeulen, D Voulot, N Warr, F Wenander, K Wimmer, and M Zielińska. 2015. “Deformation and Mixing of Coexisting Shapes in Neutron-deficient Polonium Isotopes.” Physical Review C 92 (5).
Vancouver
1.
Kesteloot N, Bastin B, Gaffney L, Wrzosek-Lipska K, Auranen K, Bauer C, et al. Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes. PHYSICAL REVIEW C. 2015;92(5).
IEEE
[1]
N. Kesteloot et al., “Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes,” PHYSICAL REVIEW C, vol. 92, no. 5, 2015.
@article{6997713,
  abstract     = {Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po-196,Po-198,Po-200,Po-202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. In the two heaviest isotopes, Po-196,Po-198, the transitional and diagonal matrix elements of the 2(1)(+) state are determined. In Po-196,Po-198 multistep Coulomb excitation is observed, populating the 4(1)(+), 0(2)(+), and 2(2)(+) states. The experimental results are compared to the results from the measurement of mean-square charge radii in polonium isotopes, confirming the onset of deformation from Po-196 onwards. Three model descriptions are used to compare to the data. Calculations with the beyond-mean-field model, the interacting boson model, and the general Bohr Hamiltonian model show partial agreement with the experimental data. Finally, calculations with a phenomenological two-level mixing model hint at the mixing of a spherical structure with a weakly deformed rotational structure.},
  articleno    = {054301},
  author       = {Kesteloot, N and Bastin, B and Gaffney, LP and Wrzosek-Lipska, K and Auranen, K and Bauer, C and Bender, M and Bildstein, V and Blazhev, A and Bönig, S and Bree, N and Clément, E and Cocolios, TE and Damyanova, A and Darby, I and De Witte, H and Di Julio, D and Diriken, J and Fransen, C and García-Ramos, JE and Gernhäuser, R and Grahn, T and Heenen, P-H and Hess, H and Heyde, Kristiaan and Huyse, M and Iwanicki, J and Jakobsson, U and Konki, J and Kröll, T and Laurent, B and Lecesne, N and Lutter, R and Pakarinen, J and Peura, P and Piselli, E and Próchniak, L and Rahkila, P and Rapisarda, E and Reiter, P and Scheck, M and Seidlitz, M and Sferrazza, M and Siebeck, B and Sjodin, M and Tornqvist, H and Traykov, E and Van De Walle, J and Van Duppen, P and Vermeulen, M and Voulot, D and Warr, N and Wenander, F and Wimmer, K and Zielińska, M},
  issn         = {0556-2813},
  journal      = {PHYSICAL REVIEW C},
  keywords     = {CHARGE RADII,SPIN STATES,INTRUDER STATES,STATE PROPERTIES,TRANSITION-PROBABILITY,PO ISOTOPES,COULOMB-EXCITATION,EVEN-EVEN NUCLIDES,NUCLEAR-DATA SHEETS,GAMMA-RAY SPECTROSCOPY},
  language     = {eng},
  number       = {5},
  pages        = {17},
  title        = {Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes},
  url          = {http://dx.doi.org/10.1103/PhysRevC.92.054301},
  volume       = {92},
  year         = {2015},
}

Altmetric
View in Altmetric
Web of Science
Times cited: