Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of ^{110} Zr

Author(s): N. Paul et al.

The first measurement of the low-lying states of the neutron-rich ${}^{110}\mathrm{Zr}$ and ${}^{112}\mathrm{Mo}$ was performed via in-beam $\gamma$-ray spectroscopy after one proton removal on hydrogen at $\sim 200\mathrm{MeV}/\text{nucleon}$. The $2_1^{+}$ excitation energies were found at 185(11) keV in ${}^{110}\mathrm{Zr}$, and 235(7) keV in ${}^{112}\mathrm{Mo}$, while the $R_{42}=E(4_1^{+})/E(2_1^{\dots }$

[Phys. Rev. Lett. 118, 032501] Published Wed Jan 18, 2017