Relative Ionization Yields for Fission Fragments in Various Gases

Lloyd O. Herwig; Glenn H. Miller

doi:10.1103/PhysRev.95.413

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Relative Ionization Yields for Fission Fragments in Various Gases

Lloyd O. Herwig^* and Glenn H. Miller

Department of Physics and Institute for Atomic Research, Iowa State College, Ames, Iowa

^*Present address: Atomic Power Division, Westinghouse Laboratories, Pittsburgh, Pennsylvania.

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Phys. Rev. 95, 413 – Published 15 July, 1954

DOI: https://doi.org/10.1103/PhysRev.95.413

Abstract

The ionizations resulting from $U^{238}$ fission have been measured in He, Ne, A, Kr, $N_{2}$ , A+3 percent C $O_{2}$ , and A+5 percent $N_{2}$ . Comparison of these values with those obtained for alpha particles in the same chamber fillings permit the calculation of ionization defect differences. It was found that about half of the 7-Mev defect previously ascribed to argon-C $O_{2}$ mixtures was due to C $O_{2}$ . Nitrogen and krypton exhibited relatively large defects. No significant difference was observed between argon and helium. Several possible explanations for this are suggested and discussed.

References (25)

Plutonium Project, Revs. Modern Phys. 18, 513 (1946)
M. Deutsch and M. Ramsey, Atomic Energy Commission Report No. MDDC-945, 1946 (unpublished)
D. C. Brunton and G. C. Hanna, Can. J. Research A28, 190 (1950)
R. B. Leachman, Phys. Rev. 87, 444 (1952)
M. C. Henderson, Phys. Rev. 58, 774 (1940)
R. B. Leachman, Phys. Rev. 79, 197 (1950)
R. B. Leachman, Phys. Rev. 83, 17 (1951)
J. K. Knipp and R. C. Ling, Phys. Rev. 82, 30 (1951)
J. K. KnippR. C. LingBritish Atomic Energy Project Reports, BR-521 and BR-522, 1944 (unpublished)
Herwig, Miller, and Utterback, Rev. Sci. Instr. (to be published)
D. H. Wilkinson, Ionization Chambers and Counters (Cambridge University Press, Cambridge, 1950), first edition, pp. 74-77
L. Colli and U. Facchini, Rev. Sci. Instr. 23, 39 (1952)
Herwig, Miller, and Utterback, Atomic Energy Commission Report No. ISC-472 (unpublished)
[11], p. 103
Hunt, Rhinehart, Weber, and Zaffarano, Rev. Sci. Instr. (to be published)
W. E. Glenn, Nucleonics 9, No. 6, 24 (1951)
T. E. Cranshaw and J. A. Harvey, Can. J. Research A26, 250 (1948)
L. O. Herwig and G. H. Miller, Phys. Rev. 94, 1183 (1954)
N. O. Lassen, Kgl. Danske Videnskab. Selskab, Mat.-fys. Medd. 26, No. 5 (1951)
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W. P. Jesse, H. Forstat, and J. Sadauskis, Phys. Rev. 77, 782 (1950)
G. C. Hanna, Phys. Rev. 80, 530 (1950)
Franzen, Rhodes, and Stephens, Phys. Rev. 87, 141 (1952)
J. DeJuren and H. Rosenwasser, Phys. Rev. 92, 544 (1953)

[c1] Plutonium Project, Revs. Modern Phys. 18, 513 (1946)

[c2] M. Deutsch and M. Ramsey, Atomic Energy Commission Report No. MDDC-945, 1946 (unpublished)

[c3] D. C. Brunton and G. C. Hanna, Can. J. Research A28, 190 (1950)

[c4] R. B. Leachman, Phys. Rev. 87, 444 (1952)

[c5] M. C. Henderson, Phys. Rev. 58, 774 (1940)

[c6] R. B. Leachman, Phys. Rev. 79, 197 (1950)

[c7] R. B. Leachman, Phys. Rev. 83, 17 (1951)

[c8] J. K. Knipp and R. C. Ling, Phys. Rev. 82, 30 (1951)

[c9] J. K. KnippR. C. LingBritish Atomic Energy Project Reports, BR-521 and BR-522, 1944 (unpublished)

[c10] Herwig, Miller, and Utterback, Rev. Sci. Instr. (to be published)

[c11] D. H. Wilkinson, Ionization Chambers and Counters (Cambridge University Press, Cambridge, 1950), first edition, pp. 74-77

[c12] L. Colli and U. Facchini, Rev. Sci. Instr. 23, 39 (1952)

[c13] Herwig, Miller, and Utterback, Atomic Energy Commission Report No. ISC-472 (unpublished)

[c14] [11], p. 103

[c15] Hunt, Rhinehart, Weber, and Zaffarano, Rev. Sci. Instr. (to be published)

[c16] W. E. Glenn, Nucleonics 9, No. 6, 24 (1951)

[c17] T. E. Cranshaw and J. A. Harvey, Can. J. Research A26, 250 (1948)

[c18] L. O. Herwig and G. H. Miller, Phys. Rev. 94, 1183 (1954)

[c19] N. O. Lassen, Kgl. Danske Videnskab. Selskab, Mat.-fys. Medd. 26, No. 5 (1951)

[c20] G. I. Bell, Phys. Rev. 90, 548 (1953)

[c21] Wm. P. Jesse, Atomic Energy Commission Report No. ANL-4944, 1952 (unpublished), p. 2

[c22] W. P. Jesse, H. Forstat, and J. Sadauskis, Phys. Rev. 77, 782 (1950)

[c23] G. C. Hanna, Phys. Rev. 80, 530 (1950)

[c24] Franzen, Rhodes, and Stephens, Phys. Rev. 87, 141 (1952)

[c25] J. DeJuren and H. Rosenwasser, Phys. Rev. 92, 544 (1953)

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Relative Ionization Yields for Fission Fragments in Various Gases

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