The scattering of slow positrons by Helium atoms is of particular interest now that positron beam experiments are being performed. The purpose of this thesis is to carry out an examination of past theoretical investigations of the problem as well as to explore various approximation schemes for describing the problem within the framework of the close-coupling method, where the total wave function is expanded in terms of the eigenstates of the target Hamiltonian and of the positronium system. The numerical techniques associated with solving the ensuing coupled intego-differential equations are described in detail. A novel use of a graphical display device as an aid to debugging the computer code is illustrated. The theoretical approximations ...
The Harris-Nesbet algebraic approach is employed to carry out calculations of positron-hydrogen scat...
The differential and total cross sections for elastic scattering o f positrons by helium atoms are c...
This thesis presents the theoretical studies of positron scattering on the helium atom using two-cen...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
An overview is given of recent progress in the calculation of positron scattering on atoms and molec...
The Convergent Close Coupling (CCC) method is applied, for the first time, to the scattering of posi...
Progress in the theoretical treatment of positron - atom and positronium - atom scattering within th...
Theoretical studies of low-energy positron collisions with various one-electron models of the helium...
The Harris-Nesbet algebraic approach is employed to carry out calculations of positron-hydrogen scat...
A magnetically guided beam of nearly-monoenergetic slow positrons has been used to study positron im...
A theoretical study of positron annihilation and scattering in helium has been made. [...
The survey reports theoretical studies involving positronium (Ps) - atom scattering. Investigations ...
The Harris-Nesbet algebraic approach is employed to carry out calculations of positron-hydrogen scat...
The differential and total cross sections for elastic scattering o f positrons by helium atoms are c...
This thesis presents the theoretical studies of positron scattering on the helium atom using two-cen...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
Theoretical investigations of the collisions of low energy positrons with helium atoms have been mad...
An overview is given of recent progress in the calculation of positron scattering on atoms and molec...
The Convergent Close Coupling (CCC) method is applied, for the first time, to the scattering of posi...
Progress in the theoretical treatment of positron - atom and positronium - atom scattering within th...
Theoretical studies of low-energy positron collisions with various one-electron models of the helium...
The Harris-Nesbet algebraic approach is employed to carry out calculations of positron-hydrogen scat...
A magnetically guided beam of nearly-monoenergetic slow positrons has been used to study positron im...
A theoretical study of positron annihilation and scattering in helium has been made. [...
The survey reports theoretical studies involving positronium (Ps) - atom scattering. Investigations ...
The Harris-Nesbet algebraic approach is employed to carry out calculations of positron-hydrogen scat...
The differential and total cross sections for elastic scattering o f positrons by helium atoms are c...
This thesis presents the theoretical studies of positron scattering on the helium atom using two-cen...