Cross-sections for formation of ⁸⁹Zr^m through ⁹⁰Zr(n,2n)⁸⁹Zr^m reaction over neutron energy range 13.73 MeV to 14.77 MeV

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• 作者：F.M.D. Attar ; R. M ; al ; S.D. Dhole ; A. Saxena ; Ashokkumar ; S. Ganesan ; S. Kailas ; V.N. Bhoraskar
• 关键词：Nuclear reactions ; ⁹⁰Zr(ration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4RM7MV3-1&_mathId=mml6&_user=1067359&_cdi=5530&_rdoc=2&_acct=C000050221&_
• 刊名：Nuclear Physics A
• 出版年：2008
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：1 April 2008
• 卷：802
• 期：1-4
• 页码：1-11
• 文件大小：279 K

摘要

The cross-sections for formation of metastable state of ⁸⁹Zr (⁸⁹Zr^m, 0.588 MeV, 4.16 m) through ⁹⁰Zr(ration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4RM7MV3-1&_mathId=mml2&_user=1067359&_cdi=5530&_rdoc=2&_acct=C000050221&_version=1&_userid=10&md5=afc5576115523bdafb915f2281e8e434" title="Click to view the MathML source" alt="Click to view the MathML source">n,2n)⁸⁹Zr^m reaction induced by 13.73 MeV to 14.77 MeV neutrons were measured for the first time and also theoretically estimated using Empire-II and Talys programs. At 13.73 MeV neutron energy, the ⁸⁹Zr nuclei can be excited to metastable state, ⁸⁹Zr^m, when the first and the second emitted neutrons have energies lower than the most probable energy ration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4RM7MV3-1&_mathId=mml3&_user=1067359&_cdi=5530&_rdoc=2&_acct=C000050221&_version=1&_userid=10&md5=6e0cb36314b29ccff3ca61f69be48991" title="Click to view the MathML source" alt="Click to view the MathML source">rc="http://www.sciencedirect.com/scidirimg/entities/223c.gif" alt="not, vert, similar" title="not, vert, similar" border="0">0.64 MeV. The probability of exciting ⁸⁹Zr nuclei to energy levels higher than 0.588 MeV and therefore of populating the metastable state through decay process increases with increasing neutron energy. The measured cross-sections vary from ref="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4RM7MV3-1&_mathId=mml4&_user=1067359&_cdi=5530&_rdoc=2&_acct=C000050221&_version=1&_userid=10&md5=f31f8ab00a5b92b22067cb9b6b53c259">rc="http://www.sciencedirect.com/cache/MiamiImageURL/B6TVB-4RM7MV3-1-4/0?wchp=dGLbVlz-zSkWW" alt="View the MathML source" title="View the MathML source" align="absbottom" border="0" height=11 width="69"/> to ref="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4RM7MV3-1&_mathId=mml5&_user=1067359&_cdi=5530&_rdoc=2&_acct=C000050221&_version=1&_userid=10&md5=c793d477ad9457bed58e5e4fcf7427f2">rc="http://www.sciencedirect.com/cache/MiamiImageURL/B6TVB-4RM7MV3-1-5/0?wchp=dGLbVlz-zSkWW" alt="View the MathML source" title="View the MathML source" align="absbottom" border="0" height=12 width="85"/> over neutron energies 13.73 MeV to 14.77 MeV, and are in agreement with the cross-sections estimated using Empire-II code. The formation of ⁸⁹Zr^m is favoured when the first and the second reaction neutrons are emitted with the most probable energies rather than lower energy, except for 13.73 MeV neutrons.