Charge signature on ionizationexcitation of He by fast projectiles.
Abstract
An analytical expression for the differential crosssection for ionizationexcitation of He to He^{+}(np) states by high energy charged particles is formulated. The ratio of the differential crosssection by a negative projectile and of the differential crosssection by an equivelocity positive projectile is found to be greater than one when the energy of the ejected electron is less than half the ground state energy of He atom.
 Publication:

Fizika A
 Pub Date:
 1995
 Bibcode:
 1995FizA....4....1B