Conversion electrons from electromagnetic transitions preceding the fission of the 3.7 ns 240fPu shape isomer have been measured. The electron spectrum shows a broad structure of individually resolved lines with energies between 620 and 650 keV, which are interpreted as the (Jβ → Jg) E0 transitions from the decay of the lowest β-vibrational band with a phonon energy of 770 keV feeding to the ground state band of 240fPu. In a combined analysis of e- and high resolution γ-ray spectroscopy data previously established octupole bands could also be studied in more detail.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - Jan 11 2001|
ASJC Scopus subject areas
- Nuclear and High Energy Physics