Kinetic-beam-energy determination via collinear laser spectroscopy

Abstract

An approach to determine the kinetic beam energy at the $10^{-5}$ level is presented, which corresponds to an improvement by more than one order of magnitude compared to conventional methods. Particularly, collinear fluorescence and resonance ionization spectroscopy measurements on rare isotope beams, where the beam energy is a major contribution to the uncertainty, can benefit from this method. The approach is based on collinear spectroscopy and requires no special equipment besides a wavelength meter, which is commonly available. Its advent is demonstrated in a proof-of-principle experiment on a Ni beam. In preparation for the energy measurement, the rest-frame transition frequencies of the $3d^{9}4s{}^3{\mathrm{D}}_3\to 3d^{9}4p{}^3{\mathrm{P}}_2$ transitions in neutral nickel isotopes have been identified to be ${\nu }_0{(}^{58}\mathrm{Ni})=850343678(20)$ MHz and ${\nu }_0{(}^{60}\mathrm{Ni})=850344183(20)$ MHz.

References in corpus (4)

• Nuclear Charge Radii of Be-7,9,10 and the one-neutron halo nucleus Be-11
• Difference in proton radii of mirror nuclei as a possible surrogate for the neutron skin
• Calibration of the ISOLDE acceleration voltage using a high-precision voltage divider and applying collinear fast beam laser spectroscopy
• A $4\pi$ Fluorescence Detection Region for Collinear Laser Spectroscopy

Cited by in corpus (1)

• Charge Radius of Neutron-deficient ${}^{54}$Ni and Symmetry Energy Constraints Using the Difference in Mirror Pair Charge Radii