Magnetic Moment of the Proton in Bohr Magnetons

Abstract

reporting their measurements on excitation cross sections in helium, also calculated K= 0. 89+ 0. 04. We obtained K= 0. 89 + 0.03 by neglecting the electric field perturbation of the ground state; inclusion of this correction resulted in K = 0. 92 + 0. 03 as reported in Sec. II.Their observed transmission curve for 2'So atoms corresponds to a value of K well below ours; this is due to poorly known velocity distribution and plate separation, neither of which was important to their main work.It was suggested to us that metastable He quenching could serve as a useful method for measuring electric fields in a beam apparatus, since often other considerations of the experiment make it difficult to know the effective plate separation accurately. ' Having measured the transmission of Eq.(6) with K= 0. 926+. 020 gives the field strength uniquely if the velocity distribution is known.We would like to thank B. Schiff for sending us a report of his and Pekeris's work [Schiff and Pekeris (unpublished)].Using their newly calculated oscillator strength between the m'So and n'P& states in Eq. (3), for m = 1 and 2 and n =4 and 5, instead of the corresponding f values of Table I, we arrived at essentially the same values for E. J. Burger and A. Lurio recently measured the oscillator strength between the 1 80 and n P& state, for n=2 and 3. Their results are in excellent agreement with the

Electron g‐factor determinations in Penning traps

“…The magnetic moment of the proton is presently known to 1 · 10 −8 [70]. Using similar experimental methods as described for hydrogen-like ions for g-factor determination of the proton an improvement by more than one order of magnitude seems possible.…”

Forty years of antiprotons

“…By observing at the same time an electronic and a nuclear magnetic transition in atomic hydrogen, Winkler et al (1972) succeeded in determining the electron-proton g-factor ratio, g j (H)/g p (H)ϭ j (H)/ p (H) with 10 ppb accuracy. From this the proton magnetic moment was derived to be p / B ϭ1.521032181(15)ϫ10 Ϫ3 , again at an accuracy of 10 ppb.…”

Developments for the direct determination of the g-factor of a single proton in a Penning trap

“…determined indirectly in many previous experiments [2][3][4][5]. The so far most precise measurement of the magnetic moment of the proton was performed by Kleppner et al in 1972 [5].…”

“…The so far most precise measurement of the magnetic moment of the proton was performed by Kleppner et al in 1972 [5]. In this experiment the ratio of the electron magnetic moment to the proton magnetic moment was determined by observing simultaneously electron and proton transitions with a hydrogen maser operating in a 0.35 T magnetic field.…”