Direct Measurement of Octupole Deformation in ¹⁴⁶Ba

Conference · Wed Nov 01 00:00:00 EDT 2017

DOI:https://doi.org/10.1142/9789813229426_0037· OSTI ID:1478631

Bucher, B.  ^[1]; Zhu, S. ^[2]; Wu, C. Y. ^[3]; F. Janssens, R. V. ^[2]; Cline, D. ^[4]; Hayes, A. B. ^[4]; Ayangeakaa, A. D. ^[2]; Buckner, M. Q. ^[3]; Campbell, C. M. ^[5]; Carpenter, M. P. ^[2]; Clark, J. A. ^[2]; Crawford, H. L. ^[5]; David, H. M. ^[2]; Dickerson, C. ^[2]; Harker, J. ^[2]; Hoffman, C. R. ^[2]; Kay, B. P. ^[2]; Kondev, F. G. ^[2]; Lauritsen, T. ^[2]; Macchiavelli, A. O. ^[5] ; Pardo, R. C. ^[2]; Savard, G. ^[2]; Seweryniak, D. ^[2]; Vondrasek, R. ^[2]

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1. Idaho National Laboratory
2. Argonne National Laboratory
3. Lawrence Livermore National Laboratory
4. University of Rochester
5. Lawrence Berkeley National Laboratory

The octupole strength present in the neutron-rich, radioactive nucleus ¹⁴⁶Ba has been experimentally determined for the first time using Coulomb excitation. To achieve this, A=146 fission fragments from CARIBU were post-accelerated by the Argonne Tandem Linac Accelerator System (ATLAS) and impinged on a thin ²⁰⁸Pb target. Using the GRETINA gamma-ray spectrometer and the CHICO2 heavy-ion counter, the reduced transition probability B(E3; 3- ->0⁺) was determined as 48(+21/-29) W.u. The new result provides further experimental evidence for the presence of a region of octupole deformation surrounding the neutron-rich barium isotopes.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1478631
• Report Number(s): INL/CON-17-40902-Rev000
• Resource Relation: Conference: Sixth International Conference on Fission and Properties of Neutron-rich Nuclei, Sanibel Island, Florida, USA, 11/06/2016 - 11/12/2016
• Country of Publication: United States
• Language: English

Related Subjects

73 - NUCLEAR PHYSICS AND RADIATION PHYSICS
octupole
Coulomb excitation
radioactive beam
barium