Atomic masses of ${}^{95–100}\mathrm{Sr}$, ${}^{98–105}\mathrm{Zr}$, and ${}^{102–110}\mathrm{Mo}$ have been measured with a precision of 10 keV employing a Penning trap setup at the IGISOL facility. Masses of ${}^{104,105}\mathrm{Zr}$ and ${}^{109,110}\mathrm{Mo}$ are measured for the first time. Our improved results indicate significant deviations from the previously published values deduced from beta end point measurements. The most neutron-rich studied isotopes are found to be significantly less bound (1 MeV) compared to the 2003 atomic mass evaluation. A strong correlation between nuclear deformation and the binding energy is observed in the two-neutron separation energy in all studied isotope chains.

• Received 15 April 2005
• Corrected 7 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.042504