Skip to Main content Skip to Navigation
Journal articles

Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os196

P. R. John V. Modamio J.J. Valiente-Dobón D. Mengoni S. Lunardi T. R. Rodríguez D. Bazzacco A. Gadea C. Wheldon T. Alexander G. de Angelis N. Ashwood M. Barr G. Benzoni B. Birkenbach P. G. Bizzeti A. M. Bizzeti-Sona S. Bottoni M. Bowry A. Bracco F. Browne M. Bunce F. Camera B. Cederwall L. Corradi F. C. L. Crespi P. Désesquelles 1 J. Eberth E. Farnea E. Fioretto A. Görgen A. Gottardo J. Grebosz L. Grente H. Hess A. Jungclaus Tz. Kokalova A. Korichi 1 W. Korten A. Kuşoğlu S. Lenzi S. Leoni J. Ljungvall 1 G. Maron W. Meczynski B. Melon R. Menegazzo C. Michelagnoli T. Mijatović B. Million P. Molini G. Montagnoli D. Montanari D. R. Napoli P. Nolan Ch. Oziol 2 Zs. Podolyák G. Pollarolo A. Pullia B. Quintana F. Recchia P. Reiter O. J. Roberts D. Rosso E. Şahin M.-D. Salsac F. Scarlassara M. Sferrazza J. Simpson P.-A. Söderström A. M. Stefanini O. Stezowski 3 S. Szilner Ch. Theisen C.A. Ur J. Walshe
1 CSNSM SNO
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 IPNL - Institut de Physique Nucléaire de Lyon
Abstract : The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188−198Os 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 γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.
Document type :
Journal articles
Complete list of metadata
http://hal.in2p3.fr/in2p3-01065841
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Thursday, September 18, 2014 - 3:52:19 PM
Last modification on : Tuesday, November 30, 2021 - 8:32:05 AM

Links full text

openaccess

Identifiers

Collections

IN2P3 | CNRS | CSNSM | IPNO | UNIV-LYON1 | IP2I | UDL

Citation

P. R. John, V. Modamio, J.J. Valiente-Dobón, D. Mengoni, S. Lunardi, et al.. Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os196. Physical Review C, American Physical Society, 2014, 90, pp.021301. ⟨10.1103/PhysRevC.90.021301⟩. ⟨in2p3-01065841⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Les métriques sont temporairement indisponibles