Document Type : Original Article
Authors
1 Departement of physics, East Tehran Branch, Islamic Azad University, Tehran, Iran
2 Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
3 Centeral Lab 2, Faculty of Agriculture, Lorestan University, Khoram-abad, Iran
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Lundstrom, T. Distefano, Surface Sciences, 59, 1976, 23.