The Beta-Decay of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">B</mi></mrow><mrow><mn>12</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">Li</mi></mrow><mrow><mn>8</mn></mrow></msup></mrow></math></span>

W. F. Hornyak; T. Lauritsen

doi:10.1103/PhysRev.77.160

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The Beta-Decay of $B^{12}$ and ${Li}^{8}$

W. F. Hornyak^* and T. Lauritsen

Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California

^*Now at Brookhaven National Laboratory, Upton, Long Island, New York.

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Phys. Rev. 77, 160 – Published 15 January, 1950

DOI: https://doi.org/10.1103/PhysRev.77.160

Abstract

The electron spectra of $B^{12}$ and ${Li}^{8}$ have been studied, using a magnetic lens spectrometer. The end point of the $B^{12}$ distribution is 13.43±0.06 Mev, while the $L^{8}$ spectrum tails off gradually with a shape which is consistent with the known broadness of the excited state of ${Be}^{8}$ to which the decay occurs. Neither distribution corresponds to the shape indicated for simple "allowed" transitions, but it seems probable that more than one state of the residual nuclei may be involved in the decay schemes. The discrepancy between the observed end point of the $B^{12}$ spectrum and the mass differences suggests the existence of an excited state at 0.9 Mev either in $B^{12}$ or $C^{12}$ .

References (15)

Crane, Delsasso, Fowler, and Lauritsen, Phys. Rev. 47, 971 (1935)
D. S. Bayley and H. R. Crane, Phys. Rev. 52, 604 (1937)
Bonner, Evans, Malich, and Risser, Phys. Rev. 73, 885 (1948)
F. L. Hereford, Phys. Rev. 74, 574 (1948)
Hornyak, Dougherty, and Lauritsen, Phys. Rev. 74, 1727 (1948)
Hornyak, Lauritsen, and Rasmussen, Phys. Rev. 76, 731 (1949)
Cook, Langer, Price, and Sampson, Phys. Rev. 74, 502 (1948)
Omitted endnote
C. L. Smith and W. Y. Chang, Proc. Roy. Soc. 166, 415 (1938)
R. Cohen and W. F. Hornyak, Phys. Rev. 72, 1127 (1947)
W. H. Barkas, Phys. Rev. 55, 691 (1939)
Mattauch and Flammersfeld, Isotopic Report, Special Issue, Zeits. f. Naturforschung (1949)
J. D. Crockroft and W. B. Lewis, Proc. Roy. Soc. A154, 246 (1936)
M. S. Livingston and H. A. Bethe, Rev. Mod. Phys. 9, 326 (1937)
E. L. Hudspeth and C. P. Swann, Phys. Rev. 74, 1722 (1948)

[c1] Crane, Delsasso, Fowler, and Lauritsen, Phys. Rev. 47, 971 (1935)

[c2] D. S. Bayley and H. R. Crane, Phys. Rev. 52, 604 (1937)

[c3] Bonner, Evans, Malich, and Risser, Phys. Rev. 73, 885 (1948)

[c4] F. L. Hereford, Phys. Rev. 74, 574 (1948)

[c5] Hornyak, Dougherty, and Lauritsen, Phys. Rev. 74, 1727 (1948)

[c6] Hornyak, Lauritsen, and Rasmussen, Phys. Rev. 76, 731 (1949)

[c7] Cook, Langer, Price, and Sampson, Phys. Rev. 74, 502 (1948)

[c8] Omitted endnote

[c9] C. L. Smith and W. Y. Chang, Proc. Roy. Soc. 166, 415 (1938)

[c10] R. Cohen and W. F. Hornyak, Phys. Rev. 72, 1127 (1947)

[c11] W. H. Barkas, Phys. Rev. 55, 691 (1939)

[c12] Mattauch and Flammersfeld, Isotopic Report, Special Issue, Zeits. f. Naturforschung (1949)

[c13] J. D. Crockroft and W. B. Lewis, Proc. Roy. Soc. A154, 246 (1936)

[c14] M. S. Livingston and H. A. Bethe, Rev. Mod. Phys. 9, 326 (1937)

[c15] E. L. Hudspeth and C. P. Swann, Phys. Rev. 74, 1722 (1948)

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The Beta-Decay of $B^{12}$ and ${Li}^{8}$

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The Beta-Decay of B12 and Li8

Abstract

References (15)

The Beta-Decay of $B^{12}$ and ${Li}^{8}$