Proton-Proton Scattering at 105 Mev and 75 Mev

Robert W. Birge; Ulrich E. Kruse; Norman F. Ramsey

doi:10.1103/PhysRev.83.274

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Proton-Proton Scattering at 105 Mev and 75 Mev

Robert W. Birge^*, Ulrich E. Kruse, and Norman F. Ramsey

Harvard University, Cambridge, Massachusetts

^*Now at the Radiation Laboratory, University of California, Berkeley, California.

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Phys. Rev. 83, 274 – Published 15 July, 1951

DOI: https://doi.org/10.1103/PhysRev.83.274

Abstract

The proton-proton differential scattering cross section has been measured at 105 Mev and at 75 Mev by using the internal beam of the Harvard cyclotron. Scintillation counters detected the scattered and recoil protons in coincidence while the beam current was monitored by measuring the absolute activity of $C^{11}$ formed in the polyethylene scattering foil. The cross section as a function of angle in the center-of-mass system appears to be isotropic within statistical deviation. It has the values 5.4× $10^{- 27}$ ${cm}^{2}$ and 6.6× $10^{- 27}$ ${cm}^{2}$ at 105 Mev and 75 Mev respectively, with an estimated error of twenty percent.

References (16)

W. K. H. Panofsky and F. L. Fillmore, Phys. Rev. 79, 57 (1950) Cork, Johnson, and Richman, 79, 71 (1950)
R. S. Christian and H. P. Noyes, Phys. Rev. 79, 85 (1950) H. Yamauchi, Ph.D. thesis, Harvard, 1950
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[c1] W. K. H. Panofsky and F. L. Fillmore, Phys. Rev. 79, 57 (1950) Cork, Johnson, and Richman, 79, 71 (1950)

[c2] R. S. Christian and H. P. Noyes, Phys. Rev. 79, 85 (1950) H. Yamauchi, Ph.D. thesis, Harvard, 1950

[c3] O. Chamberlain and C. Wiegand, Phys. Rev. 79, 81 (1950) Chamberlain, Segrè, and Wiegand, 81, 661 (1951)

[c4] R. W. Birge, Phys. Rev. 80, 490 (1950)

[c5] R. R. Wilson and E. C. Creutz, Phys. Rev. 71, 339 (1947)

[c6] C. L. Oxley, Phys. Rev. 76, 461 (1949)

[c7] O. Retzloff, Rev. Sci. Instr. 20, 324 (1949)

[c8] W. H. Jordan and P. R. Bell, Rev. Sci. Instr. 18, 703 (1947)

[c9] Howland, Schroeder, and Shipman, Jr., Rev. Sci. Instr. 18, 551 (1947)

[c10] D. Bodansky, Ph.D. thesis (Harvard, 1950)

[c11] W. G. Cross, Phys. Rev. 78, 185 (1950)

[c12] Henrich, Sewell, and Vale, Rev. Sci. Instr. 20, 887 (1949)

[c13] N. Bloembergen and P. van Heerden (private communication)

[c14] N. M. Hintz (private communication)

[c15] W. W. Chupp and E. M. McMillan, Phys. Rev. 72, 873 (1947) E. M. McMillan and R. D. Miller, 73, 80 (1948) Aamodt, Peterson, and Phillips, 78, 87A (1950) and UCRL-526 (unpublished)

[c16] Hadley, et al., Phys. Rev. 75, 351 (1949)

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Proton-Proton Scattering at 105 Mev and 75 Mev

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