First determination of ground state electromagnetic moments of Fe53

A. J. Miller, K. Minamisono, D. M. Rossi, R. Beerwerth, B. A. Brown, S. Fritzsche, D. Garand, A. Klose, Y. Liu, B. Maaß, P. F. Mantica, P. Müller (+3 others)
2017 Physical Review C  
The hyperfine coupling constants of neutron deficient 53 Fe were deduced from the atomic hyperfine spectrum of the 3d 6 4s 2 5 D4 ↔ 3d 6 4s4p 5 F5 transition, measured using the bunched-beam collinear laser spectroscopy technique. The low-energy 53 Fe beam was produced by projectile-fragmentation reactions followed by gas stopping, and used for the first time for laser spectroscopy. Ground state magnetic-dipole and electric-quadrupole moments were determined as µ = −0.65(1) µN and Q = +35(15) e
more » ... N and Q = +35(15) e 2 fm 2 , respectively. The multi-configuration Dirac-Fock (MCDF) method was used to calculate the electric field gradient to deduce Q from the quadrupole hyperfine coupling constant, since the quadrupole coupling constant has not been determined for any Fe isotopes. Both experimental values agree well with nuclear shell model calculations using the GXPF1A effective interaction performed in a full f p shell model space, which support the soft nature of the 56 Ni nucleus.
doi:10.1103/physrevc.96.054314 fatcat:auwsrinqxzhuze3pqtwjo7rdru