Carbon-10 and Mass Measurements for Light Nuclei

Abstract

The mass excess of ${}_{}{}^{10}{}_{}{}^{}\mathrm{C}$ and the excitation energy of its first excited state have been measured using the ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}({}_{}{}^3{}_{}{}^{}\mathrm{He}, t){}_{}{}^{10}{}_{}{}^{}\mathrm{C}$ reaction. The results confirm one of three earlier measurements which gave the mass excess as 15.7025±0.0018 MeV, and an average of all relevant measurements for the energy of the first excited state yields 3.344±0.008 MeV. These values differ significantly from those previously accepted, and since they provided energy calibrations for measurements on a number of light nuclei, appropriately revised results are quoted for the mass excess of ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$, as well as for the energies of the second excited state in ${}_{}{}^8{}_{}{}^{}\mathrm{B}$ and $T=\frac{3}{2}$ states in ${}_{}{}^7{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^{21}{}_{}{}^{}\mathrm{Na}$, and ${}_{}{}^{37}{}_{}{}^{}\mathrm{K}$.