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Submitted on: 26 August 2006.
Revised on: 22 December 2006.
Accepted on: 13 January 2007.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS
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Submitted on: 16 March 2015.
Revised on: 05 June 2015.
Accepted on: 28 June 2015.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS
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http://reply.papertrans.cn/2/191/19044/19044-27.png
Submitted on: 19 March 2009.
Revised on: 15 May 2009.
Accepted on: 25 June 2009.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS
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