ZhETF, Vol. 146,
p. 5 (July 2014)
(English translation - JETP,
Vol. 119, No. 1,
available online at www.springer.com
INFLUENCE OF RELATIVISTIC EFFECTS ON ELECTRON-LOSS CROSS SECTIONS OF HEAVY AND SUPERHEAVY IONS COLLIDING WITH NEUTRAL ATOMS
Tolstikhina I.Yu., Tupitsyn I.I., Andreev S.N., Shevelko V.P.
Received: January 10, 2014
The influence of relativistic effects, such as relativistic interaction and relativistic wave functions, on the electron-loss cross sections of heavy and superheavy atoms and ions (atomic number ) colliding with neutral atoms is investigated using a newly created RICODE-M computer program. It is found that the use of relativistic wave functions changes the electron-loss cross section values by about 20-30 % around the cross-section maximum compared to those calculated with nonrelativistic wave functions. At relativistic energies MeV/u, the relativistic interaction between colliding particles leads to a quasiconstant behavior of the loss cross sections σELrel \sim const, to be compared with the Born asymptotic law .