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Nuclear Experiment

arXiv:2001.00976 (nucl-ex)
[Submitted on 3 Jan 2020]

Title:First Exploration of Neutron Shell Structure Below Lead and Beyond $\boldsymbol{N=126}$

Authors:T. L. Tang, B. P. Kay, C. R. Hoffman, J. P. Schiffer, D. K. Sharp, L. P. Gaffney, S. J. Freeman, M. R. Mumpower, A. Arokiaraj, E. F. Baader, P. A. Butler, W. N. Catford, G. de Angelis, F. Flavigny, M. D. Gott, E. T. Gregor, J. Konki, M. Labiche, I. H. Lazurus, P. T. MacGregor, I. Martel, R. D. Page, Zs. Podolyák, O. Poleshchuk, R. Raabe, F. Recchia, J. F. Smith, S. V. Szwec, J. Yang
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Abstract:The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical $r$-process in producing nuclei heavier than $A\sim190$. Despite their importance, the structure and properties of these nuclei remain experimentally untested as they are difficult to produce in nuclear reactions with stable beams. In a first exploration of the shell structure of this region, neutron excitations in $^{207}$Hg have been probed using the neutron-adding ($d$,$p$) reaction in inverse kinematics. The radioactive beam of $^{206}$Hg was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of $^{207}$Hg marks a first step in improving our understanding of the relevant structural properties of nuclei involved in a key part of the path of the $r$-process.
Comments: 6 pages, 5 figures
Subjects: Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Report number: LA-UR-19-30930
Cite as: arXiv:2001.00976 [nucl-ex]
  (or arXiv:2001.00976v1 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.2001.00976
Related DOI: https://doi.org/10.1103/PhysRevLett.124.062502

Submission history

From: Benjamin Kay [view email]
[v1] Fri, 3 Jan 2020 20:23:38 UTC (225 KB)
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