New isomeric state in $^{116}\mathrm{Ag}$

New isomeric state in ${}^{116}{Ag}$

J. C. Batchelder, J.-C. Bilheux, C. R. Bingham, H. K. Carter, D. Fong, P. E. Garrett, R. Grzywacz, J. H. Hamilton, D. J. Hartley, J. K. Hwang, W. Krolas, W. D. Kulp, Y. Larochelle, A. Piechaczek, A. V. Ramayya, K. P. Rykaczewski, E. H. Spejewski, D. W. Stracener, M. N. Tantawy, J. A. Winger, J. L. Wood, and E. F. Zganjar

Phys. Rev. C 72, 044306 – Published 19 October 2005

Abstract

A new isomer in ${}^{116}{Ag}$ with a half-life of 20(1) s has been discovered through the use of conversion electron, β, and γ spectroscopy of on-line mass-separated radioactivities at the Holifield Radioactive Ion Beam Facility at ORNL. The observed electron peaks at 22.5, 44.42, and 47.33 keV were interpreted as the $K, L$ , and M conversion electron lines resulting from a 47.9-keV $E 3$ transition associated with the decay of a second isomeric level in ${}^{116}{Ag}$ . A new level structure of ${}^{116}{Ag}$ is proposed, with the levels identified as the $0^{-}$ ground-state and isomers at 47.9 and 128.8 keV having spin/parities of $3^{+}$ and $6^{-}$ respectively.

Received 25 April 2005

DOI:https://doi.org/10.1103/PhysRevC.72.044306

Authors & Affiliations

J. C. Batchelder¹, J.-C. Bilheux², C. R. Bingham^2,3, H. K. Carter¹, D. Fong⁴, P. E. Garrett⁶, R. Grzywacz², J. H. Hamilton⁴, D. J. Hartley^3,5, J. K. Hwang⁴, W. Krolas^4,7,8, W. D. Kulp⁹, Y. Larochelle³, A. Piechaczek¹⁰, A. V. Ramayya⁴, K. P. Rykaczewski², E. H. Spejewski¹, D. W. Stracener², M. N. Tantawy³, J. A. Winger¹¹, J. L. Wood⁹, and E. F. Zganjar¹⁰

¹UNIRIB/Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA
²Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
³Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
⁴Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
⁵Department of Physics, U.S. Naval Academy, Annapolis, Maryland 21402, USA
⁶Lawrence Livermore National Laboratory, Livermore, California 94551, USA
⁷Joint Institute for Heavy Ion Physics, Oak Ridge, Tennessee 37831, USA
⁸H. Niewodniczanski Institute of Nuclear Physics, PL-31342, Kraków, Poland
⁹School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
¹⁰Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
¹¹Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA

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Vol. 72, Iss. 4 — October 2005

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Physical Review C

covering nuclear physics

New isomeric state in ${}^{116}{Ag}$

Phys. Rev. C 72, 044306 – Published 19 October 2005

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

New isomeric state in Ag116

Phys. Rev. C 72, 044306 – Published 19 October 2005

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New isomeric state in ${}^{116}{Ag}$