Research Results 01

Narrow dark resonances in the spontaneous emission of gas mixture of the even isotopes of neon

The new phenomenon – the suppression of spontaneous emission – has been observed experimentally in a gas mixture of isotopes 20Ne and 22Ne. The effect is appeared as the narrow optomagnetic resonances (OMRs) in changing of intensity of the glow of the gas mixture which was in a scanned longitudinal magnetic field. The positions of OMRs (±1400 Gs and ± 900 Gs) are defined by the resonance conditions, when the isotope shift is compensated by the Zeeman effect. The narrowness of the widths of OMRs shows diminishing of the Doppler effect, i.e. atoms of different isotopes that contribute into the resonances are in rest to each other. In these conditions there is a correlated spontaneous emission of a pair of isotopes with a reduced probability.

2013-FigDarkRes-ver1

OMR versus magnetic filed (in Gs). Curve 1 – experimental example of derivative of  optomagnetic contour, in which several resonances are clearly observed  at the fields of ± 900 G and at the fields of ± 1400 G, 2 – calculated contour when were taken into account the isotope shifts in the multiplet 2p–1s.

 

Isotopic OMRs are observed at low gas pressure p ≈ 0.2 mm Hg and at narrow range of pressure – Δp/p ~ 0.1. To create the OMRs the presence of both isotopes –20Ne and 22Ne are required. Resonances at ±1400 Gauss correspond to decreasing of light emission of the gas mixture.

The obtained results of the experiment are in accordance with hypothesis of formation of a pair of entangled states of atoms of different isotopes of neon.

Publications

  1. Saprykin E.G., Sorokin V.A., Shalagin A.M. Emission anomalous optical magnetic resonances in a mixture of even neon isotopes. Journal of Experimental and Theoretical Physics, 2013, V. 116, Iss. 4, pp. 541-550.
  2. Sorokin V.A. About nature of opto-magnetic resonances in light emission from gas mixture of even neon isotopes. Techical digest. VI International Symposium MPLP 2013, P.182, Novosibirsk, Russia, August 25-31, 2013.