Nuclear Charge Distribution in Symmetric Fission of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">U</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>235</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> with Thermal Neutrons: Yields of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ag</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>117</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ag</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>118</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Pd</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>118</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>

H. V. WEISS; N. E. BALLOU; J. L. ELZIE; J. M. FRESCO

doi:10.1103/PhysRev.188.1893

Nuclear Charge Distribution in Symmetric Fission of ${}^{235}U$ with Thermal Neutrons: Yields of ${}^{117}{Ag}$ , ${}^{118}{Ag}$ , and ${}^{118}{Pd}$

H. V. WEISS, N. E. BALLOU, J. L. ELZIE, and J. M. FRESCO

Phys. Rev. 188, 1893 – Published 20 December 1969

Abstract

${}^{118}{Pd}$ was identified; it decays with a half-life of 3.1±0.3 sec. Its cumulative fractional chain yield is 0.29±0.03. The half-lives of ${}^{117}{Ag}$ and ${}^{118}{Ag}$ were verified. Their independent fractional chain yields are 0.35±0.05 and 0.55±0.10, respectively. The width parameter $σ$ in the 118-mass chain is 0.65±0.16, with the assumption that the distribution of nuclear charge is Gaussian. The most probable nuclear charge $Z_{p}$ in the 117- and 118-mass chains is 46.22±0.17 and 46.88±0.12, respectively. These values of $Z_{p}$ range close to those calculated for unchanged charge distribution.

Received 1 July 1969

DOI:https://doi.org/10.1103/PhysRev.188.1893

Authors & Affiliations

H. V. WEISS^*, N. E. BALLOU^†, J. L. ELZIE^‡, and J. M. FRESCO^§

Nuclear Chemistry Branch, Naval Radiological Defense Laboratory, San Francisco, California 94135

^*Present address: Naval Undersea Research and Development Center, San Diego, Calif. 92132.
^†Present address: Batelle Northwest, PO Box 999, Richland, Wash. 99352.
^‡Present address: Department of Chemistry, University of California, Low Angeles, Calif. 90024.
^§Present address: Department of Chemistry, McGill University, Montreal, Canada.

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Vol. 188, Iss. 4 — December 1969

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