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GOLDANSKY 1960

Goldansky, V.I.; Karpukhin, O.A.; Kutsenko, A.V.; Pavlovskaya, V.V.;
The Elastic γ p Scattering at Energies of 40-70 MeV and the Polarizability of the Proton
Zh. Eksp. Teor. Fiz. 38 (1960) 1693;

Abstracts
The elastic γ p scattering at 40 to 70 MeV energy is investigated and differential cross-sections at 45, 75, 90, 120, 135 and 150^° are determined. The results obtained are compared with the theory which takes into account the anomalous proton magnetic moment as well as the effects of mesonic cloud polarization. The cross-section of the γ p scattering at 90^° corresponds to a proton electric polarizability α_E = (11 ± 4) · 10^-43 cm³. As an addition to the experimental results the dispersion relations are used, which allow one to obtain from the PION - photoproduction data the value of the sum of electric (α_E) and magnetic (α_M) polarizabilities of proton: α_E + α_M = 11 · 10^-43 cm³. By taking this value into account the obtained experimental data correspond to the following values of the proton polarizabilities: α_E = (9 ± 2) · 10^-43 cm³, α_M = (2 ± 2) · 10^-43 cm³. A mean square fluctuation of the proton electric dipole length (overliner²)^1/2 = (3.5 div 5) · 10^-14 cm corresponds to the electric polarizability value obtained.

Accelerator LEBD-FIAN Detectors PHOTON

Related references
More (earlier) information appears in
R. G. Vasilkov, B. B. Govorkov and V. I. Goldansky, Zh. Eksp. Teor. Fiz. 37 (1959) 11;
R. G. Vasilkov, B. B. Govorkov and V. I. Goldansky, Nucl. Phys. 12 (1959) 337;
See also
F. E. Low, Phys. Rev. 96 (1954) 1428;
A. Klein, Phys. Rev. 99 (1955) 998;
R. Capps, Phys. Rev. 106 (1957) 1031;
E. C. Park, Jour. Sci. Instr. 33 (1956) 257;
W. Barber, W. George, and D. Reagen, Phys. Rev. 98 (1955) 73;
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P. V. C. Hough, Phys. Rev. 74 (1948) 80;
R. C. Miller, Phys. Rev. 95 (1954) 796;
C. Oxley and V. L. Telegdi, Phys. Rev. 100 (1955) 435;
C. Oxley, Phys. Rev. 110 (1958) 733;
G. Pugh et al., Phys. Rev. 105 (1957) 982;
M. Cini and R. Stroffolini, Nucl. Phys. 5 (1958) 684;
Y. A. Aleksandrov and I. I. Bondarenko, Zh. Eksp. Teor. Fiz. 31 (1956) 726;
V. S. Barashenkov, I. P. Stakhanov, and Y. A. Aleksandrov, Zh. Eksp. Teor. Fiz. 32 (1957) 1546;
Y. A. Aleksandrov, Zh. Eksp. Teor. Fiz. 32 (1957) 561;
Y. A. Aleksandrov, Zh. Eksp. Teor. Fiz. 33 (1957) 294;
V. S. Barashenkov and B. M. Barbashov, Nucl. Phys. 9 (1958) 426;
D. I. Blokhintsev, V. S. Barashenkov, and B. M. Barbashov, Usp. Fiz. Nauk 68 (1959) 417;
R. M. Thaler, Phys. Rev. 114 (1959) 827;
G. Breit and M. L. Rustgi, Phys. Rev. 114 (1959) 830;
L. L. Foldy, Phys. Rev. Lett. 3 (1959) 105;
H. W. Koch, J. W. Motz, Rev. of Mod. Phys. 31 (1959) 920;
S. Wahlborn, Phys. Rev. 138B (1965) 530;
F. Curtis Michel, Phys. Rev. 133B (1964) 329;
J. L. Powell, Phys. Rev. 75 (1949) 32;
M. Gell-Mann and M. Goldberger, Phys. Rev. 96 (1954) 1433;

Reactions

γ p p γ

<75 MeV (Elab)

cs, angp

Particles studied

p

mom

Record comments
First measurement of electrical polarizability of the proton.

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