Investigation of the mixed-symmetric one-quadrupole phonon 2+1,ms state of the heavy nucleus 204Hg

Low-energy quadrupole-collective excitations of isovector character, the so-called states with proton-neutron mixed-symmetric character (MSS), have been investigated in 204Hg which is the sole stable nucleus in the straight vicinity of 208Pb exhibiting a 2π - 2ν structure. A 12C(204Hg,204Hg*)12C pro...

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Published inJournal of physics. Conference series Vol. 724; no. 1
Main Authors Stegmann, R., Stahl, C., Rainovski, G., Pietralla, N., Möller, T., Lettmann, M., Janssens, R. V. F., Carpenter, M., Zhu, S.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2016
Subjects
Excitation
Gamma rays
Lead isotopes
Nuclei (nuclear physics)
Phonons
Physics
Projectiles
Quadrupoles
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Summary:Low-energy quadrupole-collective excitations of isovector character, the so-called states with proton-neutron mixed-symmetric character (MSS), have been investigated in 204Hg which is the sole stable nucleus in the straight vicinity of 208Pb exhibiting a 2π - 2ν structure. A 12C(204Hg,204Hg*)12C projectile Coulomb-excitation experiment at 890MeV was performed at Argonne National Laboratory using the ATLAS accelerator. γ-rays originating from the decay of the excited states of 204Hg were detected using the GAMMASPHERE spectrometer. The measured Coulomb-excitation yields provide the B(M1) and the B(E2) strength distributions which unambiguously reveal the 23+ state at 1948 keV as the one-phonon MSS of 204Hg.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/724/1/012047