Journal
PHYSICAL REVIEW C
Volume 93, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.93.011303
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Funding
- Alexander von Humboldt foundation
- University of Cologne
- University of Sofia
- German-Bulgarian exchange program [PPP57082997, DNTS/01/05/2014]
- DFG [Pi393/2-3]
- BMBF [05P12RDCIB, 05P12RDFN8, 05P15RDCIA]
- STFC [ST/L005808/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L005808/1] Funding Source: researchfish
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We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of Po-212. This nucleus was studied in an a-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.
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