-23- Vil. . ~UCRL-6252 ACKNOWLEDGMENTS The authors are indebted to the crew of the Berkeley 60-inch cyclotron for their cooperation and many helpful suggestions in the several irradiations. We are grateful to Dr. Edward L. Kaplan for his help in the analysis ‘of the results. We also wish to thank Mrs. Nancy Lee, Mrs. Dolores Razavi, and Miss Alice Conover for counting the numerous samples and for their help with the data reduction. REFERENCES tAL Turkevich and J. B. Niday, Phys. Rev. 84, 52 (1951). For a summary of this work see I. Halpern, Ann. Rev. Nuclear Sci. 9, 245 (1959). °G. P. Ford, Phys. Rev. 118, 1261 (1960). 4w. E. Nervik, Phys. Rev. 119, 1685 (1960). °M. Lindner, UCRL-4377. Sw. E, Nervik, J. Phys. Chem. 59, 690 (1955). "s. R. Gunn, H. G. Hicks, P. C. Stevenson, and H. B. Levy, Phys. Rev. 107, 1642 (1957). Bw. E. Deming, New York, | Statistical Adjustment of Data (John Wiley & ‘Sons, Inc. ; 1938), first edition. ? Edward L. Kaplan, private communication. 5001910

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