- Access by Xinjiang University
Pion Production by Electrons
Phys. Rev. 98, 751 – Published 1 May, 1955
DOI: https://doi.org/10.1103/PhysRev.98.751
Abstract
The production of -mesons directly by 500-Mev electrons has been studied in lithium. The measurements consist of a precise measurement of the ratio of electron-produced to bremsstrahlung-produced pion yields. Results expressed as "equivalent radiation length" for electron production are for pions of 55 Mev, and 0.0185±0.0014 for pions of 150 Mev at 75° to the incident electron beam. The results are fully compatible with purely electromagnetic interaction of the electrons. Within the limitations of the experimental data obtained to date, and of the available theoretical studies, the results are compatible with magnetic-dipole absorption as the predominant process in photopion production under the conditions indicated.
References (13)
- R. B. Neal, Stanford University Microwave Laboratory Report No. 185 (unpublished) Chodorow, Hansen, Ginzton, Kyhl, Neal and Panofsky, Rev. Sci. Instr. 26, 134 (1955)
- W. K. H. Panofsky and J. A. McIntyre, Rev. Sci. Instr. 25, 287 (1954)
- G. Tautfest and H. Fechter, Phys. Rev. 96, 35 (1954) Rev. Sci. Instr. 26, 229 (1955)
- F. von Weizsäcker and E. J. Williams, Z. Physik 88, 612 (1934) E. J. Williams, Phys. Rev. 45, 729 (1934)
- Nordheim, Nordheim, Oppenheimer, and Serber, Phys. Rev. 51, 1057 (1937)
- M. Camac, Phys. Rev. 88, 745 (1952)
Omitted endnote
- D. R. Yennie (private communication)
- J. S. Blair, Phys. Rev. 75, 907 (1948) private communications to Richard Wilson and K. L. Brown
- Thie, Mullin and Guth, Phys. Rev. 87, 962 (1952)
- H. A. Bethe and J. Ashkin, Experimental Nuclear Physics, edited by E. Segrè (John Wiley and Sons, Inc., New York, 1953), Vol. 1, pp. 259-263
- G. Bernardini and E. L. Goldwasser, Phys. Rev. 95, 857 (1954)
- Walker, Oakley, and Tollestrup, Phys. Rev. 97, 1279 (1955) ibid.89, 1301 (1953)