http://reply.papertrans.cn/2/191/19043/19043-31.png
Submitted on: 10 November 1999.
Revised on: 26 February 2000.
Accepted on: 23 March 2000.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/191/19043/19043-33.png
Submitted on: 26 March 2011.
Revised on: 06 June 2011.
Accepted on: 22 June 2011.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS
http://reply.papertrans.cn/2/191/19043/19043-35.png
Submitted on: 12 May 2003.
Revised on: 08 July 2003.
Accepted on: 30 July 2003.
___________________JOURNAL OF RADIATION RESEARCH---OXFORD UNIV PRESS