Angular Dependence of the Neutron-Induced Fission Process. II

J. E. Brolley, Jr; W. C. Dickinson; R. L. Henkel

doi:10.1103/PhysRev.99.159

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Angular Dependence of the Neutron-Induced Fission Process. II

J. E. Brolley, Jr., W. C. Dickinson^*, and R. L. Henkel

Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico

^*Present address: University of Indonesia, Bosscha Laboratory, Bandung, Java, Indonesia.

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Phys. Rev. 99, 159 – Published 1 July, 1955

DOI: https://doi.org/10.1103/PhysRev.99.159

Abstract

The angular anisotropy of neutron-induced fission has been studied with a double fission chamber. For $U^{235}$ at 7.4 Mev and ${Np}^{237}$ at 14.3 Mev, the variation of the differential fission cross section was found to depend strongly on the fourth power of the cosine of the angle between the fission fragment and the neutron beam. For $U^{235}$ a resonance-type dependence of the anisotropy on neutron energy has been observed. Qualitative indication that the light and heavy fission fragment groups have slightly different anisotropies has been obtained in the case of ${Np}^{237}$ at 14.3 Mev.

References (13)

W. C. Dickinson and J. E. Brolley, Jr., Phys. Rev. 90, 388 (1953) J. E. Brolley, Jr. and W. C. Dickinson, 94, 640 (1954)
D. L. Hill and J. A. Wheeler, Phys. Rev. 89, 1102 (1953)
Peter Fong, Phys. Rev. 89, 332 (1953), and privately circulated manuscript
J. S. Wahl, Phys. Rev. 95, 126 (1954)
R. W. Spence and G. P. Ford, Ann. Revs. Nuclear Sci. 2, 399 (1953)
Hiebert, Evans, and Watts, Los Alamos Scientific Laboratory Report LA-1565, April, 1953 (unpublished)
Bunemann, Cranshaw, and Harvey, Can. J. Research A27, 191 (1949)
W. N. English and G. C. Hanna, Can. J. Phys. 31, 768 (1953)
Omitted endnote
Knipp, Leachman, and Ling, Phys. Rev. 80, 478 (1950)
R. B. Leachman, Phys. Rev. 87, 444 (1952)
D. C. Brunton and G. C. Hanna, Can. J. Research A28, 190 (1950)
Lloyd O. Herwig and Glenn H. Miller, Phys. Rev. 95, 413 (1954)

[c1] W. C. Dickinson and J. E. Brolley, Jr., Phys. Rev. 90, 388 (1953) J. E. Brolley, Jr. and W. C. Dickinson, 94, 640 (1954)

[c2] D. L. Hill and J. A. Wheeler, Phys. Rev. 89, 1102 (1953)

[c3] Peter Fong, Phys. Rev. 89, 332 (1953), and privately circulated manuscript

[c4] J. S. Wahl, Phys. Rev. 95, 126 (1954)

[c5] R. W. Spence and G. P. Ford, Ann. Revs. Nuclear Sci. 2, 399 (1953)

[c6] Hiebert, Evans, and Watts, Los Alamos Scientific Laboratory Report LA-1565, April, 1953 (unpublished)

[c7] Bunemann, Cranshaw, and Harvey, Can. J. Research A27, 191 (1949)

[c8] W. N. English and G. C. Hanna, Can. J. Phys. 31, 768 (1953)

[c9] Omitted endnote

[c10] Knipp, Leachman, and Ling, Phys. Rev. 80, 478 (1950)

[c11] R. B. Leachman, Phys. Rev. 87, 444 (1952)

[c12] D. C. Brunton and G. C. Hanna, Can. J. Research A28, 190 (1950)

[c13] Lloyd O. Herwig and Glenn H. Miller, Phys. Rev. 95, 413 (1954)

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Angular Dependence of the Neutron-Induced Fission Process. II

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References (13)

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