First exploration of neutron shell structure below lead and beyond N=126

T.L. Tang; B.P. Kay; 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. Lazarus; P.T. MacGregor; I. Martel; R.D. Page; Zs. Podolyák; O. Poleshchuk; R. Raabe; F. Recchia; J.F.  Smith; S.V. Szwec; J. Yang

doi:10.1103/PhysRevLett.124.062502

First exploration of neutron shell structure below lead and beyond N=126

T.L. Tang, B.P. Kay, 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. Lazarus, P.T. MacGregor, I. MartelR.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 similar to 190. 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 Hg-207 have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of Hg-206 was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of Hg-207 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.

Original language	English
Article number	062502
Number of pages	7
Journal	Physical Review Letters
Volume	124
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.124.062502
Publication status	Published - 13 Feb 2020

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Keywords

R-process
Elements

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Tang, T. L., Kay, B. P., Schiffer, J. P., Sharp, D. K., Gaffney, L. P., Freeman, S. J., Mumpower, M. R., Arokiaraj, A., Baader, E. F., Butler, P. . A., Catford, W. N., de Angelis, G., Flavigny, F., Gott, M. D., Gregor, E. T., Konki, J., Labiche, M., Lazarus, I. H., MacGregor, P. T., ... Yang, J. (2020). First exploration of neutron shell structure below lead and beyond N=126. Physical Review Letters, 124(6), [062502]. https://doi.org/10.1103/PhysRevLett.124.062502

Tang, T.L. ; Kay, B.P. ; Schiffer, J.P. ; Sharp, D.K. ; Gaffney, L.P. ; Freeman, S.J. ; Mumpower, M.R. ; Arokiaraj, A. ; Baader, E.F. ; Butler, P .A. ; Catford, W.N. ; de Angelis, G. ; Flavigny, F. ; Gott, M.D. ; Gregor, E.T. ; Konki, J. ; Labiche, M. ; Lazarus, I.H. ; MacGregor, P.T. ; Martel, I. ; Page, R.D. ; Podolyák, Zs. ; Poleshchuk, O. ; Raabe, R. ; Recchia, F. ; Smith, J.F. ; Szwec, S.V. ; Yang, J. / First exploration of neutron shell structure below lead and beyond N=126. In: Physical Review Letters. 2020 ; Vol. 124, No. 6.

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title = "First exploration of neutron shell structure below lead and beyond N=126",

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 similar to 190. 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 Hg-207 have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of Hg-206 was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of Hg-207 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.",

keywords = "R-process, Elements",

author = "T.L. Tang and B.P. Kay and J.P. Schiffer and D.K. Sharp and L.P. Gaffney and S.J. Freeman and M.R. Mumpower and A. Arokiaraj and E.F. Baader and Butler, {P .A.} and W.N. Catford and {de Angelis}, G. and F. Flavigny and M.D. Gott and E.T. Gregor and J. Konki and M. Labiche and I.H. Lazarus and P.T. MacGregor and I. Martel and R.D. Page and Zs. Podoly{\'a}k and O. Poleshchuk and R. Raabe and F. Recchia and J.F. Smith and S.V. Szwec and J. Yang",

year = "2020",

month = feb

day = "13",

doi = "10.1103/PhysRevLett.124.062502",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

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Tang, TL, Kay, BP, Schiffer, JP, Sharp, DK, Gaffney, LP, Freeman, SJ, Mumpower, MR, Arokiaraj, A, Baader, EF, Butler, PA, Catford, WN, de Angelis, G, Flavigny, F, Gott, MD, Gregor, ET, Konki, J, Labiche, M, Lazarus, IH, MacGregor, PT, Martel, I, Page, RD, Podolyák, Z, Poleshchuk, O, Raabe, R, Recchia, F, Smith, JF, Szwec, SV & Yang, J 2020, 'First exploration of neutron shell structure below lead and beyond N=126', Physical Review Letters, vol. 124, no. 6, 062502. https://doi.org/10.1103/PhysRevLett.124.062502

First exploration of neutron shell structure below lead and beyond N=126. / Tang, T.L.; Kay, B.P.; Schiffer, J.P.; Sharp, D.K.; Gaffney, L.P.; Freeman, S.J.; Mumpower, M.R.; Arokiaraj, A.; Baader, E.F.; Butler, P .A.; Catford, W.N.; de Angelis, G.; Flavigny, F.; Gott, M.D.; Gregor, E.T.; Konki, J.; Labiche, M.; Lazarus, I.H.; MacGregor, P.T.; Martel, I.; Page, R.D.; Podolyák, Zs.; Poleshchuk, O.; Raabe, R.; Recchia, F.; Smith, J.F. ; Szwec, S.V.; Yang, J.

In: Physical Review Letters, Vol. 124, No. 6, 062502, 13.02.2020.

Research output: Contribution to journal › Article

TY - JOUR

T1 - First exploration of neutron shell structure below lead and beyond N=126

AU - Tang, T.L.

AU - Kay, B.P.

AU - Schiffer, J.P.

AU - Sharp, D.K.

AU - Gaffney, L.P.

AU - Freeman, S.J.

AU - Mumpower, M.R.

AU - Arokiaraj, A.

AU - Baader, E.F.

AU - Butler, P .A.

AU - Catford, W.N.

AU - de Angelis, G.

AU - Flavigny, F.

AU - Gott, M.D.

AU - Gregor, E.T.

AU - Konki, J.

AU - Labiche, M.

AU - Lazarus, I.H.

AU - MacGregor, P.T.

AU - Martel, I.

AU - Page, R.D.

AU - Podolyák, Zs.

AU - Poleshchuk, O.

AU - Raabe, R.

AU - Recchia, F.

AU - Smith, J.F.

AU - Szwec, S.V.

AU - Yang, J.

PY - 2020/2/13

Y1 - 2020/2/13

N2 - 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 similar to 190. 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 Hg-207 have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of Hg-206 was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of Hg-207 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.

AB - 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 similar to 190. 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 Hg-207 have been probed using the neutron-adding (d,p) reaction in inverse kinematics. The radioactive beam of Hg-206 was delivered to the new ISOLDE Solenoidal Spectrometer at an energy above the Coulomb barrier. The spectroscopy of Hg-207 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.

KW - R-process

KW - Elements

U2 - 10.1103/PhysRevLett.124.062502

DO - 10.1103/PhysRevLett.124.062502

M3 - Article

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 6

M1 - 062502

ER -

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2020 01 02 Tang et al Exploration finalFinal published version, 391 KBLicence: CC BY