Inelastic Events Induced by 32-Mev Protons on Helium

Jack Benveniste; Bruce Cork

doi:10.1103/PhysRev.89.422

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Inelastic Events Induced by 32-Mev Protons on Helium

Jack Benveniste and Bruce Cork

Radiation Laboratory, University of California, Berkeley, California

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Phys. Rev. 89, 422 – Published 15 January, 1953

DOI: https://doi.org/10.1103/PhysRev.89.422

Abstract

A study of inelastic events induced by the bombardment of helium nuclei with 32-Mev protons has been made.

No low energy group of protons has been found which would indicate the existence of an excited, heavy-particle stable state of the helium nucleus. The absence of a bump on the continuum of protons from the reactions $p + {He}^{4} \to {He}^{3} + n + p^{'},$ $p + {He}^{4} \to H^{3} + p^{''} + p^{'},$ indicates a maximum cross section of 0.1 mb/sterad at 45° c.m. for the production of a single excited helium level as high as 23.3 Mev above the ground state. Further, the observed rather flat shape of the continuum requires the existence of at least two levels of about 1-Mev half-width, separated by about 1 Mev.

The angular variation of the differential cross section for the production of deuterons from the reaction $p + {He}^{4} \to {He}^{3} + d$ has been measured. When the principle of detailed balancing is invoked, good agreement with the prediction of the theory of Butler is obtained for $r_{0} (range of nuclear forces plus radius of {He}^{3} nucleus) = 4.2 \times 10^{- 13}$ cm.

References (20)

E. Feenberg, Phys. Rev. 49, 328 (1936)
H. A. Bethe and R. F. Bacher, Revs. Modern Phys. 8, 147 (1936)
L. D. P. King and L. Goldstein, Phys. Rev. 75, 1366 (1949)
J. H. Coon and R. A. Nobles, Phys. Rev. 75, 1358 (1949)
Argo, Gittings, Hemmendinger, Jarvis, and Taschek, Phys. Rev. 78, 691 (1950)
R. F. Taschek, Phys. Rev. 76, 584 (1949)
J. Benveniste, University of California Radiation Laboratory Report UCRL-1689, (thesis) (unpublished)
J. H. Smith, Phys. Rev. 71, 32 (1947)
C. E. Falk and F. C. Phillips, Phys. Rev. 83, 468 (1951)
B. H. Flowers and F. Mandl, Proc. Roy. Soc. (London) A206, 131 (1951)
J. C. Allred, Phys. Rev. 84, 695 (1951)
S. T. Butler, Proc. Roy. Soc. (London) A208, 559 (1951)
L. Schecter, Phys. Rev. 83, 695 (1951)
Burrows, Powell, and Rotblatt, Proc. Roy. Soc. (London) A209, 461 (1951)
Burrows, Powell, and Rotblatt, Proc. Roy. Soc. (London), A209, 478 (1951)
Burrows, Gibson, and Rotblatt, Proc. Roy. Soc. (London), A209, 489 (1951)
Burge, Burrows, Gibson, and Rotblatt, Proc. Roy. Soc. (London) A210, 534 (1952)
W. M. Gibson and E. E. Thomas, Proc. Roy. Soc. (London) A210, 543 (1952)
S. T. Butler and J. L. Symonds, Phys. Rev. 83, 858 (1951)
Brolley, Fowler, and Stovall, Phys. Rev. 82, 502 (1951)

[c1] E. Feenberg, Phys. Rev. 49, 328 (1936)

[c2] H. A. Bethe and R. F. Bacher, Revs. Modern Phys. 8, 147 (1936)

[c3] L. D. P. King and L. Goldstein, Phys. Rev. 75, 1366 (1949)

[c4] J. H. Coon and R. A. Nobles, Phys. Rev. 75, 1358 (1949)

[c5] Argo, Gittings, Hemmendinger, Jarvis, and Taschek, Phys. Rev. 78, 691 (1950)

[c6] R. F. Taschek, Phys. Rev. 76, 584 (1949)

[c7] J. Benveniste, University of California Radiation Laboratory Report UCRL-1689, (thesis) (unpublished)

[c8] J. H. Smith, Phys. Rev. 71, 32 (1947)

[c9] C. E. Falk and F. C. Phillips, Phys. Rev. 83, 468 (1951)

[c10] B. H. Flowers and F. Mandl, Proc. Roy. Soc. (London) A206, 131 (1951)

[c11] J. C. Allred, Phys. Rev. 84, 695 (1951)

[c12] S. T. Butler, Proc. Roy. Soc. (London) A208, 559 (1951)

[c13] L. Schecter, Phys. Rev. 83, 695 (1951)

[c14] Burrows, Powell, and Rotblatt, Proc. Roy. Soc. (London) A209, 461 (1951)

[c15] Burrows, Powell, and Rotblatt, Proc. Roy. Soc. (London), A209, 478 (1951)

[c16] Burrows, Gibson, and Rotblatt, Proc. Roy. Soc. (London), A209, 489 (1951)

[c17] Burge, Burrows, Gibson, and Rotblatt, Proc. Roy. Soc. (London) A210, 534 (1952)

[c18] W. M. Gibson and E. E. Thomas, Proc. Roy. Soc. (London) A210, 543 (1952)

[c19] S. T. Butler and J. L. Symonds, Phys. Rev. 83, 858 (1951)

[c20] Brolley, Fowler, and Stovall, Phys. Rev. 82, 502 (1951)

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Inelastic Events Induced by 32-Mev Protons on Helium

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References (20)

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