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Sains Malaysiana 42(3)(2013): 333–340
Application of the Non-Orthogonal Laguerre-L2 Basis to the Calculation of Electron-Helium Scattering at Intermediate Energy (Penggunaan Asas Tak Ortogon Laguerre-L2 untuk Pengiraan Serakan Elektron-Helium
pada Tenaga Pertengahan)
Agus Kartono & Mustafa Mamat*
Institute of
Oceanography and Environment, Universiti Malaysia
Terengganu
Mengabang Telipot,
21030 Kuala Terengganu, Terengganu, Malaysia
Mustafa Mama*t
Department of
Mathematics, Faculty of Sciences and Technology, Universiti Malaysia Terengganu
Mengabang Telipot,
21030 Kuala Terengganu, Terengganu, Malaysia
Received: 10 June 2012/Accepted:
17 September 2012
ABSTRACT
Differential cross sections for
excitation to the n=2 states of atomic helium by electrons were computed for
incident energies in the range from 30 to 50 eV. The n=2
states excitation cross sections were calculated with the use of close-coupling
expansion with a non-orthogonal Laguerre-L2 basis function. The present status of agreement between theory
and experiment for excitation of the ground-state was quite satisfactory.
Keywords: Atomic helium;
close-coupling; differential cross sections; excitation
ABSTRAK
Pembezaan keratan rentas untuk pengujaan keadaan atom helium n=2 oleh elektron untuk tenaga insiden dikira dalam julat daripada 30 kepada 50 eV. Keadaan keratan rentasn=2 dikira dengan menggunakan pengembangan gabungan-tertutup bersama suatu fungsi asas tak-ortogon Laguerre-L2. Persetujuan antara teori dan eksperimen untuk pengujaan ke keadaan asas adalah agak memuaskan.
Kata kunci: Atom helium; gabungan-tertutup; pembezaan keratan rentas; pengujaan
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*Corresponding author; email: mus@umt.edu.my
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