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Shape evolution in the neutron-rich osmium isotopes : Prompt gamma-ray spectroscopy of Os-196

John, P. R. (author)
Modamio, V. (author)
Valiente-Dobon, J. J. (author)
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Mengoni, D. (author)
Lunardi, S. (author)
Rodriguez, T. R. (author)
Bazzacco, D. (author)
Gadea, A. (author)
Wheldon, C. (author)
Alexander, T. (author)
de Angelis, G. (author)
Ashwood, N. (author)
Barr, M. (author)
Benzoni, G. (author)
Birkenbach, B. (author)
Bizzeti, P. G. (author)
Bizzeti-Sona, A. M. (author)
Bottoni, S. (author)
Bowry, M. (author)
Bracco, A. (author)
Browne, F. (author)
Bunce, M. (author)
Camera, F. (author)
Cederwall, Bo (author)
KTH,Kärnfysik
Corradi, L. (author)
Crespi, F. C. L. (author)
Desesquelles, P. (author)
Eberth, J. (author)
Farnea, E. (author)
Fioretto, E. (author)
Goergen, A. (author)
Gottardo, A. (author)
Grebosz, J. (author)
Grente, L. (author)
Hess, H. (author)
Jungclaus, A. (author)
Kokalova, Tz. (author)
Korichi, A. (author)
Korten, W. (author)
Kusoglu, A. (author)
Lenzi, S. (author)
Leoni, S. (author)
Ljungvall, J. (author)
Maron, G. (author)
Meczynski, W. (author)
Melon, B. (author)
Menegazzo, R. (author)
Michelagnoli, C. (author)
Mijatovic, T. (author)
Million, B. (author)
Molini, P. (author)
Montagnoli, G. (author)
Montanari, D. (author)
Napoli, D. R. (author)
Nolan, P. (author)
Oziol, Ch. (author)
Podolyak, Zs. (author)
Pollarolo, G. (author)
Pullia, A. (author)
Uppsala universitet,Institutionen för fysik och astronomi
Quintana, B. (author)
Recchia, F. (author)
Reiter, P. (author)
Roberts, O. J. (author)
Rosso, D. (author)
Sahin, E. (author)
Salsac, M. -D (author)
Scarlassara, F. (author)
Sferrazza, M. (author)
Simpson, J. (author)
Soderstrom, P. -A (author)
Stefanini, A. M. (author)
Stezowski, O. (author)
Szilner, S. (author)
Theisen, Ch. (author)
Ur, C. A. (author)
Walshe, J. (author)
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 (creator_code:org_t)
2014
2014
English.
In: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 90:2, s. 021301-
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich Os-196 nucleus through in-beam gamma-ray spectroscopy using a two-proton transfer reaction from a Pt-198 target to a Se-82 beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident gamma rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of Os-196 were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even Os188-198 isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect gamma-unstable/triaxial rotor yrast band is predicted for Os-196 which is in agreement with the experimentally measured excited states.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

atomic-nuclei
transition
coexistence
isomers
os

Publication and Content Type

ref (subject category)
art (subject category)

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