The Disintegration of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Ce</mi></mrow><mrow><mn>144</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">Pr</mi></mrow><mrow><mn>144</mn></mrow></msup></mrow></math></span>

Fred T. Porter; C. Sharp Cook

doi:10.1103/PhysRev.87.464

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The Disintegration of ${Ce}^{144}$ and $\Pr^{144}$

Fred T. Porter and C. Sharp Cook

Physics Department, Washington University, St. Louis, Missouri

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Phys. Rev. 87, 464 – Published 1 August, 1952

DOI: https://doi.org/10.1103/PhysRev.87.464

Abstract

The radiations from the radioactive chain ${Ce}^{144}$ → $\Pr^{144}$ → ${Nd}^{144}$ have been investigated, using chemically purified sources. ${Ce}^{144}$ (295-day half-life) decays to the ground state of $\Pr^{144}$ through a 70 percent abundant beta-group having a maximum energy of 304±2 kev. Conversion electrons have been observed which indicate that within the praseodymium nucleus there are transitions having energies 33.7, 53.5, 80.7, 100.3, and 134.2 kev. The predominant number of the $\Pr^{144}$ beta-transitions go directly to the ground state of ${Nd}^{144}$ through a 2.97±0.01 Mev beta-group. Conversion electrons from a weak 60.3-kev transition in neodymium have been observed. Very weak gamma-radiation having energies 0.696, 1.5, and 2.185 Mev have been observed. The beta-spectrum indicates that less than 2 percent of the beta-transitions go to excited states of neodymium at 0.696 and 2.185 Mev. Using the evidence available a disintegration scheme has been proposed.

References (14)

R. P. Schuman and A. Camilli, Phys. Rev. 84, 158 (1951)
R. J. Hayden, Phys. Rev. 74, 650 (1948)
Newton, Kant, and Hein, The Transuranium Elements: Research Papers (McGraw-Hill Book Company, Inc., New York, 1950), Paper No. 185, National Nuclear Energy Series, Plutonium Project Record, Vol. 14B, Div. IV
H. B. Keller and J. M. Cork, Phys. Rev. 84, 1079 (1951)
Alburger, der Mateosian, Goldhaber, and Katcoff, Phys. Rev. 82, 332 (1951) private communication at New York Meeting, 1952
L. M. Langer and R. D. Moffat, private communication
F. T. Porter and C. S. Cook, Phys. Rev. 85, 733 (1952)
Chen, John, and Kurbatov, Phys. Rev. 85, 487 (1952)
A. M. Feingold, Revs. Modern Phys. 23, 10 (1951)
Ter-Pogossian, Cook, Porter, Morganstern, and Hudis, Phys. Rev. 80, 360 (1950)
G. E. Owen and C. S. Cook, Rev. Sci. Instr. 20, 768 (1949)
L. M. Langer, Rev. Sci. Instr. 20, 216 (1949)
M. Goldhaber and A. W. Sunyar, Phys. Rev. 83, 906 (1951)
L. W. Nordheim, Phys. Rev. 78, 294 (1950) Revs. Modern Phys. 23, 332 (1951)

[c1] R. P. Schuman and A. Camilli, Phys. Rev. 84, 158 (1951)

[c2] R. J. Hayden, Phys. Rev. 74, 650 (1948)

[c3] Newton, Kant, and Hein, The Transuranium Elements: Research Papers (McGraw-Hill Book Company, Inc., New York, 1950), Paper No. 185, National Nuclear Energy Series, Plutonium Project Record, Vol. 14B, Div. IV

[c4] H. B. Keller and J. M. Cork, Phys. Rev. 84, 1079 (1951)

[c5] Alburger, der Mateosian, Goldhaber, and Katcoff, Phys. Rev. 82, 332 (1951) private communication at New York Meeting, 1952

[c6] L. M. Langer and R. D. Moffat, private communication

[c7] F. T. Porter and C. S. Cook, Phys. Rev. 85, 733 (1952)

[c8] Chen, John, and Kurbatov, Phys. Rev. 85, 487 (1952)

[c9] A. M. Feingold, Revs. Modern Phys. 23, 10 (1951)

[c10] Ter-Pogossian, Cook, Porter, Morganstern, and Hudis, Phys. Rev. 80, 360 (1950)

[c11] G. E. Owen and C. S. Cook, Rev. Sci. Instr. 20, 768 (1949)

[c12] L. M. Langer, Rev. Sci. Instr. 20, 216 (1949)

[c13] M. Goldhaber and A. W. Sunyar, Phys. Rev. 83, 906 (1951)

[c14] L. W. Nordheim, Phys. Rev. 78, 294 (1950) Revs. Modern Phys. 23, 332 (1951)

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The Disintegration of ${Ce}^{144}$ and $\Pr^{144}$

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The Disintegration of Ce144 and Pr144

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References (14)

The Disintegration of ${Ce}^{144}$ and $\Pr^{144}$