Ho, YK.
1998.
Magnetic-field effects on the }{IMG}{ [http://ej.iop.org/images/0953-4075/31/6/007/toc_img1.gif] doubly excited resonance states of }{IMG}{ [http://ej.iop.org/images/0953-4075/31/6/007/toc_img2.gif]. Journal of Physics B: Atomic, Molecular and Optical Physics. 31:1191., Number 6
AbstractMagnetic-field effects on the ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img3.gif] Feshbach resonances below the H ( N = 2) threshold and the ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img3.gif] shape resonance of ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img5.gif] lying above the H ( N = 3) threshold are investigated theoretically using a method of complex-coordinate rotation. Products of Slater-type orbitals (STOs) are used to represent the two-electron wavefunctions, with ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img6.gif] being employed for individual electrons. Block matrices with up to ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img7.gif] (K-states) are used. Convergence behaviour for the resonance parameters (resonance energy and width) is examined by using different values of ##IMG## [http://ej.iop.org/images/0953-4075/31/6/007/img8.gif] . When the external magnetic field is turned on, we examine the field effects on the resonance energies and the autoionization widths. A physical interpretation of our results is given.
Kauppila, WE, Stein TS, Smart JH, Dababneh MS, Ho YK, Downing JP, Pol V.
1981.
Measurements of total scattering cross sections for intermediate-energy positrons and electrons colliding with helium, neon, and argon. Physical Review A. 24:725., Number 2: APS
Abstract
] 
