In-beam conversion-electron spectroscopy of Hg-180

R. D. Page*, A. N. Andreyev, D. R. Wiseman, P. A. Butler, T. Grahn, P. T. Greenlees, R. -D. Herzberg, M. Huyse, G. D. Jones, P. M. Jones, D. T. Joss, R. Julin, S. Juutinen, H. Kankaanpaa, A. Keenan, H. Kettunen, P. Kuusiniemi, M. Leino, M. Muikku, P. NieminenP. Rahkila, G. I. Rainovski, C. Scholey, J. Uusitalo, K. Van de Vel, P. Van Duppen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Excited states in Hg-180 were populated using the Sm-147(Ar-36,3n)Hg-180 reaction and studied by in-beam conversion-electron spectroscopy. Conversion electrons emitted at the target position were measured using the Silicon Array for Conversion Electron Detection (SACRED) spectrometer and tagged through the characteristic alpha decays of Hg-180 detected in a position-sensitive silicon strip detector located at the focal plane of the gas-filled recoil separator Recoil Ion Transport Unit (RITU). Electron conversion of transitions previously assigned to Hg-180 through in-beam gamma-ray spectroscopy studies was identified up to the 10(+) -> 8(+) transition and the intensities of the conversion-electron transitions were found to be consistent with the previous multipolarity assignments. Evidence was also found for two highly converted transitions in Hg-180: a 167 keV transition is interpreted as the transition from the newly identified 2(2)(+) state at 601 keV to the 2(1)(+) state at 434 keV, while a 420 keV transition is assigned as the E0 decay from the 0(+) bandhead of the prolate-deformed configuration to the weakly deformed ground state.

Original languageEnglish
Article numberARTN 034308
Number of pages4
JournalPhysical Review C
Volume84
Issue number3
DOIs
Publication statusPublished - 7 Sept 2011

Keywords

  • STATES
  • ISOTOPES
  • SHAPE COEXISTENCE
  • HG NUCLEI
  • ALPHA-DECAY
  • EXCITATIONS
  • GAMMA-RAY
  • REGION
  • BANDS

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