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Study of the Order-to-Chaos transition in 174 W with the AGATA-Demonstrator
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2012 (English)In: Journal of Physics: Conference Series, Vol. 366, no 1Article in journal (Refereed) Published
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Abstract [en]

The transition between order and chaos is studied in the warm rotating nucleus 174 W by γ-spectroscopy, focusing on the conservation of selection rules of the K quantum number with the excitation energy, where K is the projection of the total angular momentum on the symmetry axis. The 174 W nucleus was populated by the fusion-evaporation reaction of 80 Ti (at 217 MeV) on a 128 Te backed target. The measurement was performed in July 2010 at Legnaro National Laboratories of INFN using the AGATA Demonstrator HPGe-array coupled to an array of 27 BaF 2 scintillators, named Helena. The data analysis concentrates on γ-γ coincidence matrices selecting the γ-decay flow populating low- K and high- K structures. By a statistical fluctuation analysis the total number of low- K and high- K bands can be evaluated as a function of excitation energy. Comparisons with cranked shell model calculations at finite temperature are used to extract information on the onset of the chaotic regime as a function of excitation energy.

Place, publisher, year, edition, pages
2012. Vol. 366, no 1
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Subatomic Physics
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URN: urn:nbn:se:uu:diva-293585OAI: oai:DiVA.org:uu-293585DiVA: diva2:928012
Available from: 2016-05-13 Created: 2016-05-13 Last updated: 2016-05-13

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http://stacks.iop.org/1742-6596/366/i=1/a=012045

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Nyberg, Johan
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