Ll. Nemenov et Vd. Ovsiannikov, DC field control of decay processes in a (pi(+)-pi(-))-atom: a possibilityto measure the energy splitting between 2s-and 2p-states, PHYS LETT B, 514(3-4), 2001, pp. 247-252
The (pi (+)-pi (-))-atom life-time dependence on a dc electric field is det
ermined. The possibility is demonstrated to measure the 2s-2p energy splitt
ing with the use of this dependence. (C) 2001 Published by Elsevier Science
B.V.