ACCURATE DETERMINATION OF THE $mu$$sup +$ MAGNETIC MOMENT

Journal Article · Thu Mar 31 23:00:00 EST 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.118.271· OSTI ID:4186105

Garwin, R L; Hutchinson, D P; Penman, S; Shapiro, G

BS>Using a precession technique, the magnetic moment of the positive mu meson is determined to an accuracy of 0.007%. Muons are brought to rest in a bromoform target situated in a homogeneous magnetic field oniented at right angles to the initial muon spin direction. The precession of the spin about the field direction, together with the asymmetric decay of the muon, produces a periodic time variation in the probability distribution of electrons emitted in a fixed laboratory direction. The period of this variation is compared with that of a reference oscillator by means of phase measurements of the "beat note" between the two. The magnetic field at which the precession and reference frequencies coincide is measured with reference to a proton nuclear magnetic resonance magnetometer. The ratio of the muon precession frequency to that of the proton in the same magnetic field is thus determined to be 3.1834 plus or minus 0.0002. Using a re-evaluated lower limit to the muon mass. this is shown to yield a lower limit on the muon g factor of quantum electrodynamics. (auth)

• Research Organization: Columbia Univ., New York
• NSA Number: NSA-14-015222
• OSTI ID: 4186105
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 118; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ANGULAR DISTRIBUTION
ANISOTROPY
BROMINATED HYDROCARBONS
BROMINE COMPOUNDS
BROMOFORM
DECAY
ELECTRODYNAMICS
ELECTRONS
EMISSION
ERRORS
FREQUENCY
GYROMAGNETIC RATIO
HALOGENATED HYDROCARBONS
HOMOGENEOUS REACTORS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MASS
MUONS
MUONS-PLUS
NUCLEAR MAGNETIC RESONANCE
OSCILLATIONS
PHYSICS
PROTONS
QUANTITATIVE ANALYSIS
QUANTUM MECHANICS
ROTATION
SPIN
TARGETS
VARIATIONS