Submitted on: 17 August 2003.
Revised on: 16 November 2003.
Accepted on: 31 December 2003.
___________________EPJ Nuclear Sciences & Technologies
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Submitted on: 01 June 2000.
Revised on: 27 June 2000.
Accepted on: 26 August 2000.
___________________EPJ Nuclear Sciences & Technologies
Submitted on: 01 May 2012.
Revised on: 24 July 2012.
Accepted on: 14 September 2012.
___________________EPJ Nuclear Sciences & Technologies
Submitted on: 05 March 1999.
Revised on: 13 April 1999.
Accepted on: 05 May 1999.
___________________EPJ Nuclear Sciences & Technologies
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