According to Cohen, S.; Judd, D.L.; Riddell, Jr., R.J. (1960). "μ-Mesonic Molecules. II. Molecular-Ion Formation and Nuclear Catalysis". Phys. Rev. 119 (1): 397. Bibcode:1960PhRv..119..397C. doi:10.1103/PhysRev.119.397., footnote 16, Jackson may have been overly optimistic in Appendix D of his 1957 paper in his roughly calculated "guesstimate" of the rate of formation of a muonic (p–μ–p)+ molecular ion by a factor of about a million or so.)
According to Cohen, S.; Judd, D.L.; Riddell, Jr., R.J. (1960). "μ-Mesonic Molecules. II. Molecular-Ion Formation and Nuclear Catalysis". Phys. Rev. 119 (1): 397. Bibcode:1960PhRv..119..397C. doi:10.1103/PhysRev.119.397., footnote 16, Jackson may have been overly optimistic in Appendix D of his 1957 paper in his roughly calculated "guesstimate" of the rate of formation of a muonic (p–μ–p)+ molecular ion by a factor of about a million or so.)