Measurement and DWBA analysis of the ¹²C(⁶Li, d)¹⁶O b1;-transfer reaction cross sections at 48.2 MeV. R-matrix analysis of ¹²C(box>b1;,b3;box>)¹⁶O direct capture reaction d

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• 作者：A. Belhout ; S. Ouichaoui ; H. Beaumevieille ; A. Boughrara ; S. Fortier ; J. Kiener ; J.M. Maison ; S.K. Mehdi ; L. Rosier ; J.P. Thibaud ; A. Trabelsi ; J. Vernotte
• 关键词：Nuclear reaction ; ¹²C(⁶Li ;   ; d)¹⁶O ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml21&_user=10&_c
• 刊名：Nuclear Physics A
• 出版年：2007
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：1 September 2007
• 卷：793
• 期：1-4
• 页码：178-211
• 文件大小：457 K

摘要

The angular distributions for low lying states of ¹⁶O produced in the ¹²C(⁶Li, d)¹⁶O b1;-transfer reaction at b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml2&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=380977714a0e151b2b04fca27c65227c">bsbottom" border="0" height=16 width=146> have been measured using a high energy resolution position sensitive detection system. The measured cross section data have been analyzed by the FRDWBA theory with a particular emphasis put on the states of astrophysical interest mainly the black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml3&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=89d22033e989a97ea140b267a2b7b2ee" title="Click to view the MathML source">1⁻ (7.12 MeV) state. Extracted values of nuclear level parameters (excitation energy, black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml4&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=2c21d0bd57b8b53c30b266d9fa36a2df" title="Click to view the MathML source">Eb>xb>, line width, black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml5&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=6630a7dc7a679360096da90818f977cf" title="Click to view the MathML source">Γb>c.m.b>, b1;-spectroscopic factor, black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml6&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=2c1f79f8c6636d6eb5ff57518d48237c" title="Click to view the MathML source">Sb>b1;b>, and reduced b1;-width, b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml7&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=b54b1fe1fee4f60ba2f278ab73b05df5">bsbottom" border="0" height=19 width=18> or b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml8&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=814923436aa85f3e409f3232c3f6f0a0">bsbottom" border="0" height=19 width=17>) are reported and discussed in comparison to previous ones. The used binding potential corresponds to a long nuclear interaction range (up to a channel radius black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml9&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=5dea30d6346ebab8c7b4fe487a7ca21e" title="Click to view the MathML source">a=7.7 fm), suggesting that the channel radius black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml10&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=c2ac722e1c9a22b4c3cc72ba7b43e67f" title="Click to view the MathML source">a=6.5 fm is likely suitable for the calculations of reduced b1;-widths near the nuclear surface. However, given that previous DWBA results are available for comparison only near the channel radius black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml11&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=06a2ede5854e1357c8b313672f6672cb" title="Click to view the MathML source">a=5.5 fm, calculations have been carried out here for both three preceding a values. Formal values, b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml12&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=d5c67d07b2c7ff1f598aea1732ba0667">bsbottom" border="0" height=19 width=177> and b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml13&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=3c53877c97a40a9b1de86c839e11cbf0">bsbottom" border="0" height=19 width=169> of the reduced b1;-widths (black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml14&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=a0d54ef10b0407fbf6bb4e42ba56ae39" title="Click to view the MathML source">a=6.5 fm) of the black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml15&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=505891d90a8878a95cdb8b2a34c23a87" title="Click to view the MathML source">1⁻ (7.12 MeV) and black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml16&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=715e06c6386dcbbeccc106e4d54ff202" title="Click to view the MathML source">2⁺ (6.92 MeV) states have thus been derived. Furthermore, the R-matrix analysis of various data sets of importance to the ¹²C(black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml17&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=772598611dd80e5294aec4fc6d129412" title="Click to view the MathML source">b1;,b3;)¹⁶O direct capture reaction has been carried out, leading to the range of values for the black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml18&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=a4b10d098d7fa69c13e9ddfda3050765" title="Click to view the MathML source">1⁻ (7.12 MeV) state, b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml19&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=513429c5b2cdf0d3d0acfc4424d1c3c5">bsbottom" border="0" height=19 width=185>, which is consistent with the preceding DWBA interval, and to a result for the E1 component of the reaction astrophysical factor, b=MathURL&_method=retrieve&_udi=B6TVB-4P2S8YB-5&_mathId=mml20&_user=10&_cdi=5530&_rdoc=11&_acct=C000050221&_version=1&_userid=10&md5=853433762bde5ffb04bb22adc25f61db">bsbottom" border="0" height=21 width=168>, very consistent with most constrained values previously reported in the literature.