Based on experimental evidence from the 144Sm(α,2n) reaction, the 3484.7-keV 6+ state in 146Gd is identified as the highest-spin member of the 3-⊗3- two-phonon octupole quartet. A previously unknown γ line of 1905.8 keV and E3 character feeding the 3- octupole state has been observed. These results represent the first observation of a 6+→3-→0+ cascade of two E3 transitions in an even-even nucleus and provide strong support for the interpretation of the 6+ state as a two-phonon octupole excitation.
Two-phonon octupole excitation in 146Gd
LUNARDI, SANTO;
2010
Abstract
Based on experimental evidence from the 144Sm(α,2n) reaction, the 3484.7-keV 6+ state in 146Gd is identified as the highest-spin member of the 3-⊗3- two-phonon octupole quartet. A previously unknown γ line of 1905.8 keV and E3 character feeding the 3- octupole state has been observed. These results represent the first observation of a 6+→3-→0+ cascade of two E3 transitions in an even-even nucleus and provide strong support for the interpretation of the 6+ state as a two-phonon octupole excitation.File in questo prodotto:
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