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

Keywords

R-process
Elements

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10.1103/PhysRevLett.124.062502Licence: CC BY

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

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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), Article 062502. https://doi.org/10.1103/PhysRevLett.124.062502

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

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publisher = "American Physical Society",

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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

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

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 062502

ER -

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

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