Resonant Enhancement of Neutrinoless Double-Electron Capture in $^{152}\mathrm{Gd}$

Resonant Enhancement of Neutrinoless Double-Electron Capture in ${}^{152}{Gd}$

S. Eliseev, C. Roux, K. Blaum, M. Block, C. Droese, F. Herfurth, H.-J. Kluge, M. I. Krivoruchenko, Yu. N. Novikov, E. Minaya Ramirez, L. Schweikhard, V. M. Shabaev, F. Šimkovic, I. I. Tupitsyn, K. Zuber, and N. A. Zubova

Phys. Rev. Lett. 106, 052504 – Published 4 February 2011

Abstract

In the search for the nuclide with the largest probability for neutrinoless double-electron capture, we have determined the $Q_{ϵ ϵ}$ value between the ground states of ${}^{152}{Gd}$ and ${}^{152}{Sm}$ by Penning-trap mass-ratio measurements. The new $Q_{ϵ ϵ}$ value of 55.70(18) keV results in a half-life of $10^{26} yr$ for a 1 eV neutrino mass. With this smallest half-life among known $0 ν ϵ ϵ$ transitions, ${}^{152}{Gd}$ is a promising candidate for the search for neutrinoless double-electron capture.

Received 14 December 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.052504

Authors & Affiliations

S. Eliseev¹, C. Roux¹, K. Blaum^1,2, M. Block³, C. Droese⁴, F. Herfurth³, H.-J. Kluge^2,3, M. I. Krivoruchenko⁵, Yu. N. Novikov⁶, E. Minaya Ramirez^3,7, L. Schweikhard⁴, V. M. Shabaev⁸, F. Šimkovic^9,10, I. I. Tupitsyn⁸, K. Zuber¹¹, and N. A. Zubova⁸

¹Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
²Physikalisches Institut, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany
³GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
⁴Institut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany
⁵Institute for Theoretical and Experimental Physics, 117218 Moscow, Russia
⁶PNPI, Gatchina, 188300 St. Petersburg, Russia
⁷Helmholtz-Institut Mainz, Johannes Gutenberg-Universität, 55099 Mainz, Germany
⁸Department of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia
⁹Joint Institute for Nuclear Research, 141980 Dubna, Russia
¹⁰Department of Nuclear Physics and Biophysics, Comenius University, 84248 Bratislava, Slovakia
¹¹Institut für Kern- und Teilchenphysik, Technische Universität, 01069 Dresden, Germany

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Vol. 106, Iss. 5 — 4 February 2011

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Physical Review Letters

Resonant Enhancement of Neutrinoless Double-Electron Capture in Gd152

S. Eliseev, C. Roux, K. Blaum, M. Block, C. Droese, F. Herfurth, H.-J. Kluge, M. I. Krivoruchenko, Yu. N. Novikov, E. Minaya Ramirez, L. Schweikhard, V. M. Shabaev, F. Šimkovic, I. I. Tupitsyn, K. Zuber, and N. A. Zubova

Phys. Rev. Lett. 106, 052504 – Published 4 February 2011

Abstract

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Resonant Enhancement of Neutrinoless Double-Electron Capture in ${}^{152}{Gd}$