Publications

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2006
Kar, S, Ho YK.  2006.  Doubly excited\^{}$\{$1, 3$\}$ P\^{}$\{$o$\}$ resonance states of Ps\^{}$\{$-$\}$ in weakly coupled plasmas. Physical Review A. 73:032502., Number 3: APS Abstract2006_3.pdf

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Kar, S, Ho YK.  2006.  Doubly-excited 1, 3 P o states of H- interacting with screened coulomb (Yukawa) potentials. Few-Body Systems. 40:13–20., Number 1-2: Springer Abstract2006_4.pdf

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2005
Kar, S, Ho YK.  2005.  Doubly excited 2s2p\^{}$\{$1, 3$\}$ P\^{}$\{$o$\}$ resonance states of helium in dense plasmas. Physical Review A. 72:010703., Number 1: APS Abstract2005_1.pdf

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Kar, S, Ho YK.  2005.  Doubly-excited 2s2 1Se resonance state of helium embedded in Debye plasmas. Chemical Physics Letters. 402:544-548., Number 4–6 Abstract2005_2.pdfWebsite

We have made a first investigation on the resonances in two electron systems in various model plasma environments. The 2s2 1Se autoionization resonance state in the helium atom is determined by calculating the density of resonance states using the stabilization method. A screened Coulomb potential obtained from the Debye model is used to represent the interaction between the charged particles. A correlated wave function has been used to represent the correlation effect between the three charge particles. The calculated resonance energies and widths for various Debye parameters ranging from infinity to a small value along with the ground state energies are reported.

2003
Yan, ZC, Ho YK.  2003.  Determination of resonance energies and widths in Ps–H scattering using the stabilization method. Journal of Physics B: Atomic, Molecular and Optical Physics. 36:4417-4426., Number 22: IOP Publishing Abstract2003_3.pdf

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2002
Yan, Z-C, Ho YK.  2002.  D-wave resonances in e+-H scattering. Journal of Physics B: Atomic, Molecular and Optical Physics. 35:1875., Number 8: IOP Publishing Abstract2002_4.pdf

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Ho, YK.  2002.  Doubly-Excited States of Two-Electron Atomic Systems in External Fields. Resonances in Few-Body Systems. :23–35.: Springer Abstract2002_5.pdf

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2001
Ho, YK, Ivanov IA.  2001.  dc Stark effect for doubly excited Feshbach resonance states of the positronium negative ion below the $N=2$ threshold of a positronium atom, May. Phys. Rev. A. 63:062503.: American Physical Society Abstract2001_1.pdfWebsite

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2000
Sahoo, S, Ho YK.  2000.  Determination of resonance energy and width using the method of complex absorbing potential. Chinese Journal Of Physics. 38:96., Number 127-138 Abstract2000_3.pdf

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Pong, WJ, Ho YK.  2000.  Doubly-excited states of beryllium-like ions. Physica Scripta. 61:690., Number 6: IOP Publishing Abstract2000_4.pdf

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1999
Fang, TK, Ho YK.  1999.  Determination of resonance energies and widths of Mg 3pnell 1De and 1Fo doubly excited states by the stabilization method with the B-spline-based configuration interaction approach. Journal of Physics B: Atomic, Molecular and Optical Physics. 32:3863., Number 15: IOP Publishing Abstract1999_3.pdf

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Fang, TK, Ho YK.  1999.  Determination of Resonance Energies and Widths of the Mg IPO Doubly Excited States by the Stabilization Method with the B-spline-based Configuration Interaction Approach. Chinese Journal of Physics. 37, Number 1 Abstract1999_4.pdf

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1998
Tan, SS, Ho YK.  1998.  Determination of Resonance Energy and Width by Calculation of the Density of Resonance States Using the Stabilisation Met hod. Chinese Journal of Physics. 35:701–707., Number 6: Chinese Journal of Physics Abstract1998_4.pdf

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1997
Ho, YK, Bhatia AK.  1997.  Doubly-excited states in helium-like systems. Journal of Physics B: Atomic, Molecular and Optical Physics. 30:3597., Number 16: IOP Publishing Abstract1997_1.pdf

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1996
Ho, YK.  1996.  Doubly-Excited 1, 3Po Autoionization States of He between the N= 3 and N= 4 Thresholds of He+ Ions. Chinese Journal of Physics. 34:9–23., Number 1: Chinese Journal of Physics Abstract1996_2.pdf

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1994
Ho, YK.  1994.  Doubly excited shape resonance states in H\^{}$\{$-$\}$ above the hydrogen N= 5 threshold. Physical Review A. 50:4877., Number 6: APS Abstract1994_1.pdf

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Ho, YK.  1994.  Doubly excited states of C4+ between the N= 2 and N= 3 C5+ thresholds. Physica Scripta. 50:654., Number 6: IOP Publishing Abstract1994_2.pdf

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Ho, YK.  1994.  Doubly excited states of positronium negative ions. Hyperfine Interactions. 89:401–406., Number 1: Springer Abstract1994_3.pdf

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1993
Ho, YK, Bhatia AK.  1993.  Doubly excited $^{1,3}$${\mathit{P}}^{\mathit{e}}$ states in heliumlike systems, Apr. Phys. Rev. A. 47:2628–2633.: American Physical Society Abstract1993_1.pdfWebsite

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Ho, YK, Bhatia AK.  1993.  Doubly excited shape resonances in H\^{}$\{$-$\}$. Physical Review A. 48:3720., Number 5: APS Abstract1993_3.pdf

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