English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Excited states in the well-deformed rare earth isotopes $^{154}$Sm and$^{166}$Er were populated via ``safe'' Coulomb excitation at the Munich MLLTandem accelerator. Conversion electrons were registered in a cooled Si(Li)detector in conjunction with a magnetic transport and filter system, theMini-Orange spectrometer. For the first excited $0^+$ state in $^{154}$Sm at1099 keV a large value of the monopole strength for the transition to theground state of $\rho^2(\text{E0}; 0^+_2 \to 0^+_\text{g}) = 96(42)\cdot10^{-3}$ could be extracted. This confirms the interpretation of the lowestexcited $0^+$ state in $^{154}$Sm as the collective $\beta$-vibrationalexcitation of the ground state. In $^{166}$Er the measured large electricmonopole strength of $\rho^2(\text{E0}; 0^+_4 \to 0^+_1) = 127(60)\cdot10^{-3}$ clearly identifies the $0_4^+$ state at 1934 keV to be the$\beta$-vibrational excitation of the ground state.

First identification of large electric monopole strength in well-deformed rare earth nuclei