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Coherent proton-neutron contribution to octupole correlations in the neutron-deficient Xe-114 nucleus
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2002 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 535, no 04-jan, 93-102 p.Article in journal (Refereed) Published
Abstract [en]

Gamma ray linear polarization and picosecond lifetimes have been measured for levels in the neutron deficient nucleus Xe-114 using the EUROBALL IV spectrometer and the Cologne plunger device. The EUCLIDES Si-ball was used to improve the reaction channel selectivity. The linear polarization results have, for the first time, unambiguously determined the electromagnetic character of the dipole transitions de-exciting the negative parity level sequence, providing clear evidence for enhanced octupole collectivity. The discovery of two E3 transitions and the measurement of the lifetimes of the states depopulated by these transitions have allowed a quantitative determination of the octupole collectivity in the A approximate to 112 mass region. The large measured B(E3) values, close to approximate to 70 W.u., are among the strongest observed hitherto and indicate a coherent proton-neutron contribution to the octupole moment.

Place, publisher, year, edition, pages
2002. Vol. 535, no 04-jan, 93-102 p.
Keyword [en]
Xe-114, linear polarization, gamma-gamma-light charged particle coincidences, lifetimes, octupole correlations, decay curve method, ba-ce-region, high spins, deformed-nuclei, shape changes, instability, mass
Identifiers
URN: urn:nbn:se:kth:diva-21608ISI: 000176094400015OAI: oai:DiVA.org:kth-21608DiVA: diva2:340306
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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