Phys.Rev. C 101, 054313 (2020)

A.Antognini, N.Berger, T.E.Cocolios, R.Dressler, R.Eichler, A.Eggenberger, P.Indelicato, K.Jungmann, C.H.Keitel, K.Kirch, A.Knecht, N.Michel, J.Nuber, N.S.Oreshkina, A.Ouf, A.Papa, R.Pohl, M.Pospelov, E.Rapisarda, N.Ritjoho, S.Roccia, N.Severijns, A.Skawran, S.M.Vogiatzi, F.Wauters, L.Willmann

Measurement of the quadrupole moment of ¹⁸⁵Re and ¹⁸⁷Re from the hyperfine structure of muonic X rays

ATOMIC PHYSICS ^185,187Re, ²⁰⁸Pb(μ^-, μ^-'), E at 29 MeV/c, [negative muon beam from the decay of pions produced in C(p, π), E=590 MeV]; measured Eγ, Iγ, energy and intensities of muonic x-rays using two HPGe detectors at the HIPA facility of Paul Scherrer Institut; deduced hyperfine splitting of the 5g to 4f muonic atom transitions, and compared to state-of-the-art atomic theoretical predictions; extracted spectroscopic quadrupole moments for ground states of ¹⁸⁵Re and ¹⁸⁷Re.

NUCLEAR MOMENTS ^185,187Re; measured muonic atom hyperfine structure; deduced spectroscopic quadrupole moments of ground states. Comparison with previous experimental measurement using natural Re target, and with theoretical predictions.

doi: 10.1103/PhysRevC.101.054313