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arXiv 2007.07837nucl-ex
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977 MeV和1143 MeV $^{204}$ Hg与$^{208}$ Pb相互作用中的多核子转移

Multi-nucleon transfer in the interaction of 977 MeV and 1143 MeV $^{204}$Hg with $^{208}$Pb

V. V. Desai, A. Pica, W. Loveland, J. S. Barrett, Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 USA, E. A. McCutchan, National Nucle… 展开作者

V. V. Desai, A. Pica, W. Loveland, J. S. Barrett, Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 USA, E. A. McCutchan, National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973, USA, S. Zhu, M. P. Carpenter, J. P. Greene, T. Lauritsen, Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 USA, R. V. F. Janssens, Department of Physics, Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 USA, Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708 USA, B. M. S. Amro, Dept. of Physics, University of Massachusetts Lowell, Lowell MA 01854 USA, W. B. Walters, Dept. of Chemistry, University of Maryland, College Park, MD

备注：
11 figures. arXiv admin note: text overlap with arXiv:1505.00257
发表信息：
Physical Review C 101, 034612 (2020)
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摘要：

以前对大质量核对称碰撞的研究表明，目前的多核子转移（MNT）反应模型不能充分描述转移产物产额。为了进一步了解这个问题，我们测量了977（E/A = 4.79 MeV）和1143 MeV（E/A = 5.60 MeV）$^{204}$ Hg与$^{208}$ Pb相互作用中MNT产物的产额。我们发现这两个反应中多核子转移产物的产额相似，但远低于1257 MeV（E/A = 6.16 MeV）$^{204}$ Hg + $^{198}$ Pt反应中的产额。我们比较我们的测量与预测的放牧-F，双核系统（DNS）和改进的量子分子动力学（ImQMD）模型。对于Au、Hg、Tl、Pb和Bi等元素的实测同位素，MNT截面的实测值比预测值大几个数量级。此外，各种模型预测在N=126壳层附近形成核素，但没有观察到。

英文摘要：

A previous study of symmetric collisions of massive nuclei has shown that current models of multi-nucleon transfer (MNT) reactions do not adequately describe the transfer product yields. To gain further insight into this problem, we have measured the yields of MNT products in the interaction of 977 (E/A = 4.79 MeV) and 1143 MeV (E/A = 5.60 MeV) $^{204}$Hg with $^{208}$Pb. We find that the yield of multi-nucleon transfer products are similar in these two reactions and are substantially lower than those observed in the reaction of 1257 MeV (E/A = 6.16 MeV) $^{204}$Hg + $^{198}$Pt. We compare our measurements with the predictions of the GRAZING-F, di-nuclear systems (DNS) and improved quantum molecular dynamics (ImQMD) models. For the observed isotopes of the elements Au, Hg, Tl, Pb and Bi, the measured values of the MNT cross sections are orders of magnitude larger than the predicted values. Furthermore, the various models predict the formation of nuclides near the N=126 shell, which are not observed.

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