Il Nuovo Cimento A (1965-1970)

, Volume 105, Issue 2, pp 215–232 | Cite as

Intrinsic and collective166Er levels fed in the decays of166Hom (T1/2=1200 y) and166Hog (T1/2=26.8 h)

  • C. Ardisson
  • V. Barci
  • J. Dalmasso
  • A. Hachem
  • G. Ardisson


The radioactive decays of166Ho isomers (Iπ=7 and 0) have been reinvestigated using high-resolution γ-ray detectors in single and coincidence measurements. Nine γ-lines are new, among the fifty-three γ-lines accurately measured belonging to166Hom decay (Iπ=7); sixteen γ-lines were measured in166Hog decay (Iπ=0) out of which 3 are new; moreover, γ-γ coincidence experiments using two germanium detectors were performed. A166Er level scheme was built which interprets all γ-lines measured: two new levels are proposed to be fed in the166Hom decay, namely theKIπ=22+ at 785.8 keV and aIπ=4 state at 1572.1 keV; in166Hog decay, theKIπ=022+ state in166Er is confirmed, and a new level is found at 1812.8 keV (Iπ=1+). Spin, parity and Nilsson orbitals assignments of the intrinsic166Er states are discussed.

PACS 23.20. Lv

Gamma transitions and level energies 

PACS 23.40

β decay electron and muon capture 


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Copyright information

© Società Italiana di Fisica 1982

Authors and Affiliations

  • C. Ardisson
    • 1
  • V. Barci
    • 1
  • J. Dalmasso
    • 1
  • A. Hachem
    • 1
  • G. Ardisson
    • 1
  1. 1.Laboratoire de RadiochimieUniversité de Nice-Sophia AntipolisNice-CédexFrance

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