Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-02-21
Phys.Rev.Lett. 92 (2004) 022501
Physics
Nuclear Physics
Nuclear Experiment
13 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.92.022501
Motivated by the theoretical hypotheses on the existence of heretofore unobserved stable elementary particles and exotic nuclear states, we searched for doubly-charged particles, as anomalously heavy isotopes of helium, in the Earth's atmoshpere using a sensitive laser spectroscopy technique. The concentration of noble-gas-like atoms in the atmosphere and the subsequent very large depletion of the light He-3,4 isotopes allow us to set stringent limits on th abundance: 10^-13 to 10^-17 per atom in the solar system, over the mass range of 20 to 10,000 amu.
Holt Robert J.
Lu Zheng-Tian
Mueller Peter
O'Connor Thomas P.
Schiffer J. P.
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