Radioactivity of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mn>10</mn></mrow></msup></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>14</mn></mrow></msup></mrow></math></span>

R. Sherr; H. R. Muether; M. G. White

doi:10.1103/PhysRev.75.282

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Radioactivity of $C^{10}$ and $O^{14}$

R. Sherr^*, H. R. Muether^*, and M. G. White^*

Palmer Physical Laboratory, Princeton University, Princeton, New Jersey

^*Assisted by the Joint Program of the Office of Naval Research and the Atomic Energy Commission.

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Phys. Rev. 75, 282 – Published 15 January, 1949

DOI: https://doi.org/10.1103/PhysRev.75.282

Abstract

A new activity, $O^{14}$ , has been produced from $N^{14}$ by a ( $pn$ ) reaction and is found to decay with a half-life of 76.5±2 sec. by the emission of 1.8±0.1-Mev positrons and a 2.3-Mev gamma-ray. Rough threshold measurements indicate that the gamma- and beta-rays are in cascade. $C^{10}$ , formed by a ( $pn$ ) reaction in $B^{10}$ , has been carefully reexamined and shown to decay with a half-life of 19.1±0.8 sec. by the emission of 2.2±0.1-Mev positrons and a gamma-ray of approximately 1 Mev. The Coulomb energy formula for this type of mirror nucleus is shown to be valid, but the same theoretical difficulties are encountered here as are already known from the long lives of ${Be}^{10}$ and $C^{14}$ .

References (15)

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Wigner (Phys. Rev. 51, 106 (1937))

[c1] E. Wigner, Phys. Rev. 56, 519 (1939) M. G. White, E. C. Creutz, L. A. Delsasso, and R. R. Wilson, 59, 63 (1941) [2]

[c2] E. J. Konopinski, Rev. Mod. Phys. 15, 209 (1943)

[c3] L. A. Delsasso, M. G. White, W. Barkas, and E. C. Creutz, Phys. Rev. 58, 586 (1940)

[c4] H. S. Sommers, Jr. and R. Sherr, Phys. Rev. 69, 21 (1946)

[c5] M. G. White, L. A. Delsasso, J. G. Fox, and E. C. Creutz, Phys. Rev. 56, 512 (1939)

[c6] E. Bleuler and W. Zünti, Helv. Phys. Acta 19, 375 (1946)

[c7] E. M. MacMillan, Phys. Rev. 72, 591 (1947)

[c8] T. Lauritsen, C. B. Dougherty and V. K. Rasmussen, Phys. Rev. 74, 1566 (1948)

[c9] T. Lauritsen, W. A. Fowler, C. C. Lauritsen, and V. K. Rasmussen, Phys. Rev. 73, 636 (1948)

[c10] E. Feenberg and G. Goertzel, Phys. Rev. 70, 597 (1946)

[c11] G. T. Seaborg, Rev. Mod. Phys. 16, 1 (1944)

[c12] W. A. Fowler, C. C. Lauritsen, and T. Lauritsen, Rev. Mod. Phys. 20, 236 (1948)

[c13] W. F. Hornyak and T. Lauritsen, Rev. Mod. Phys. 20, 214 (1948)

[c14] T. Lauritsen, C. C. Lauritsen, and W. A. Fowler, Phys. Rev. 59, 241 (1941)

[c15] Wigner (Phys. Rev. 51, 106 (1937))

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Radioactivity of $C^{10}$ and $O^{14}$

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Radioactivity of C10 and O14

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Radioactivity of $C^{10}$ and $O^{14}$