Measurement of the Proton Moment in Absolute Units

H. A. Thomas; R. L. Driscoll; J. A. Hipple

doi:10.1103/PhysRev.78.787

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Measurement of the Proton Moment in Absolute Units

H. A. Thomas, R. L. Driscoll, and J. A. Hipple

National Bureau of Standards, Washington, D. C.

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Phys. Rev. 78, 787 – Published 15 June, 1950

DOI: https://doi.org/10.1103/PhysRev.78.787

Abstract

By measuring the absolute value of the magnetic field and the frequency required for nuclear resonance absorption in a water sample, the gyromagnetic ratio of the proton has been determined to be $γ_{P} = (2.67528 \pm 0.00006) \times 10^{4}$ ${\sec .}^{- 1}$ ${gauss}^{- 1}$ . With this value and Planck's constant the value of the magnetic moment of the proton in absolute units becomes $μ_{P} = (1.4100 \pm 0.0002) \times 10^{- 23}$ dyne cm/gauss.

A combination of our result with recent measurements of the proton moment in Bohr magnetons by Gardner and Purcell results in a value of $\frac{e}{m} = (1.75890 \pm 0.00005) \times 10^{7}$ e.m.u. ${gram}^{- 1}$ .

References (18)

Rabi, Millman, Kusch, and Zacharias, Phys. Rev. 55, 526 (1939)
F. Bloch, Phys. Rev. 70, 460 (1946)
Purcell, Torrey, and Pound, Phys. Rev. 69, 37 (1946)
Bloembergen, Purcell, and Pound, Phys. Rev. 73, 679 (1948)
L. M. Brown and E. M. Purcell, Phys. Rev. 75, 1262 (1949)
A. Cotton and G. Dupouy, Congres Internat. d'Elec. Section 3, 2, 208 (1932)
F. A. Scott, Phys. Rev. 46, 633 (1934)
G. H. Briggs and A. F. A. Harper, J. Sci. Inst. 13, 119 (1936)
H. A. Thomas and R. D. Huntoon, Rev. Sci. Inst. 20, 516 (1949)
Curtis, Moon, and Sparks, J. Research Nat. Bur. Stand. 21, 375 (1938), RP1137
C. Moon, Bur. Stand. J. Research 10, 249 (1933), RP528
W. E. Lamb, Jr., Phys. Rev. 60, 817 (1941) N. F. Ramsey [ 77, 567 (1950)]
Thomas, Driscoll, and Hipple, Phys. Rev. 75, 902 (1949)
J. W. M. DuMond and E. R. Cohen, Rev. Mod. Phys. 20, 82 (1948)
J. H. Gardner and E. M. Purcell, Phys. Rev. 76, 1262 (1949)
H. Taub and P. Kusch, Phys. Rev. 75, 1481 (1949) P. Kusch and H. Taub, 75, 1477 (1949)
Thomas, Driscoll, and Hipple, Phys. Rev. 75, 992 (1949)
Hipple, Sommer, and Thomas, Phys. Rev. 76, 1877 (1949)

[c1] Rabi, Millman, Kusch, and Zacharias, Phys. Rev. 55, 526 (1939)

[c2] F. Bloch, Phys. Rev. 70, 460 (1946)

[c3] Purcell, Torrey, and Pound, Phys. Rev. 69, 37 (1946)

[c4] Bloembergen, Purcell, and Pound, Phys. Rev. 73, 679 (1948)

[c5] L. M. Brown and E. M. Purcell, Phys. Rev. 75, 1262 (1949)

[c6] A. Cotton and G. Dupouy, Congres Internat. d'Elec. Section 3, 2, 208 (1932)

[c7] F. A. Scott, Phys. Rev. 46, 633 (1934)

[c8] G. H. Briggs and A. F. A. Harper, J. Sci. Inst. 13, 119 (1936)

[c9] H. A. Thomas and R. D. Huntoon, Rev. Sci. Inst. 20, 516 (1949)

[c10] Curtis, Moon, and Sparks, J. Research Nat. Bur. Stand. 21, 375 (1938), RP1137

[c11] C. Moon, Bur. Stand. J. Research 10, 249 (1933), RP528

[c12] W. E. Lamb, Jr., Phys. Rev. 60, 817 (1941) N. F. Ramsey [ 77, 567 (1950)]

[c13] Thomas, Driscoll, and Hipple, Phys. Rev. 75, 902 (1949)

[c14] J. W. M. DuMond and E. R. Cohen, Rev. Mod. Phys. 20, 82 (1948)

[c15] J. H. Gardner and E. M. Purcell, Phys. Rev. 76, 1262 (1949)

[c16] H. Taub and P. Kusch, Phys. Rev. 75, 1481 (1949) P. Kusch and H. Taub, 75, 1477 (1949)

[c17] Thomas, Driscoll, and Hipple, Phys. Rev. 75, 992 (1949)

[c18] Hipple, Sommer, and Thomas, Phys. Rev. 76, 1877 (1949)

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Measurement of the Proton Moment in Absolute Units

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