Submitted on: 16 September 2019.
Revised on: 10 November 2019.
Accepted on: 07 December 2019.
___________________Jordan Journal of Physics---YARMOUK UNIV, DEANSHIP RESEARCH & GRADUATE STUDIES
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Submitted on: 05 November 2009.
Revised on: 25 December 2009.
Accepted on: 16 February 2010.
___________________Jordan Journal of Physics---YARMOUK UNIV, DEANSHIP RESEARCH & GRADUATE STUDIES
Submitted on: 29 January 2002.
Revised on: 03 April 2002.
Accepted on: 24 May 2002.
___________________Jordan Journal of Physics---YARMOUK UNIV, DEANSHIP RESEARCH & GRADUATE STUDIES
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Submitted on: 17 January 2004.
Revised on: 21 February 2004.
Accepted on: 04 April 2004.
___________________Jordan Journal of Physics---YARMOUK UNIV, DEANSHIP RESEARCH & GRADUATE STUDIES
Submitted on: 19 May 2003.
Revised on: 22 August 2003.
Accepted on: 26 September 2003.
___________________Jordan Journal of Physics---YARMOUK UNIV, DEANSHIP RESEARCH & GRADUATE STUDIES