| Autor: |
Bucher, B, Zhu, S, Wu, CY, Janssens, RVF, Cline, D, Hayes, AB, Albers, M, Ayangeakaa, AD, Butler, PA, Campbell, CM, Carpenter, MP, Chiara, CJ, Clark, JA, Crawford, HL, Cromaz, M, David, HM, Dickerson, C, Gregor, ET, Harker, J, Hoffman, CR, Kay, BP, Kondev, FG, Korichi, A, Lauritsen, T, Macchiavelli, AO, Pardo, RC, Richard, A, Riley, MA, Savard, G, Scheck, M, Seweryniak, D, Smith, MK, Vondrasek, R, Wiens, A |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Zdroj: |
Bucher, B; Zhu, S; Wu, CY; Janssens, RVF; Cline, D; Hayes, AB; et al.(2016). Direct Evidence of Octupole Deformation in Neutron-Rich Ba 144. Physical Review Letters, 116(11). doi: 10.1103/PhysRevLett.116.112503. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7g0213h2 |
| DOI: |
10.17615/p8s7-bn56 |
| Popis: |
©=0.65(+17-23) eb3/2, corresponds to a reduced B(E3) transition probability of 48(+25-34) W.u. This result represents an unambiguous determination of the octupole collectivity, is larger than any available theoretical prediction, and is consistent with octupole deformation. © 2016 American Physical Society. The neutron-rich nucleus Ba144 (t1/2=11.5 s) is expected to exhibit some of the strongest octupole correlations among nuclei with mass numbers A less than 200. Until now, indirect evidence for such strong correlations has been inferred from observations such as enhanced E1 transitions and interleaving positive- and negative-parity levels in the ground-state band. In this experiment, the octupole strength was measured directly by sub-barrier, multistep Coulomb excitation of a post-accelerated 650-MeV Ba144 beam on a 1.0-mg/cm2 Pb208 target. The measured value of the matrix element, 31-M(E3)01+ |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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