Phys. Rev. Lett. 96, 063401 (2006) [4 pages]

Measurement of the Decay Rate of the Negative Ion of Positronium (Ps^-)

Abstract

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Frank Fleischer^1,*, Kai Degreif¹, Gerald Gwinner^1,†, Michael Lestinsky¹, Vitaly Liechtenstein², Florian Plenge¹, and Dirk Schwalm¹
¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany
²Kurchatov Institute, Moscow, Russia

Received 28 November 2005; published 13 February 2006

A new determination of the decay rate of the negative ion of positronium (Ps^-), using a beam-foil method and a stripping-based detection technique, is reported. The measured result of Γ=2.089(15) ns^-1 is a factor of 6 more precise than the previous experimental value of Γ=2.09(9) ns^-1, and is in excellent agreement with the theoretical value of Γ=2.086(6) ns^-1.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.96.063401

DOI:

10.1103/PhysRevLett.96.063401

PACS:

36.10.Dr

^*Electronic address: F.Fleischer@mpi-hd.mpg.de

^†Permanent address: Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

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Phys. Rev. Lett. 96, 063401 (2006) [4 pages]

Measurement of the Decay Rate of the Negative Ion of Positronium (Ps-)

Measurement of the Decay Rate of the Negative Ion of Positronium (Ps^-)