A study of hyperfine transitions of singly ionized praseodymium (141Pr+) using collinear laser ion beam spectroscopyN. Akhtar, N. Anjum, H. Hühnermann and L. WindholzEur. Phys. J. D, 66 10 (2012) 264DOI: https://doi.org/10.1140/epjd/e2012-30440-6