Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure

T. Day Goodacre; A. V. Afanasjev; A. E. Barzakh; B. A. Marsh; S. Sels; P. Ring; H. Nakada; A. N. Andreyev; P. Van Duppen; N. A. Althubiti; B. Andel; D. Atanasov; J. Billowes; K. Blaum; T. E. Cocolios; J. G. Cubiss; G. J. Farooq-Smith; D. V. Fedorov; V. N. Fedosseev; K. T. Flanagan; L. P. Gaffney; L. Ghys; M. Huyse; S. Kreim; D. Lunney; K. M. Lynch; V. Manea; Y. Martinez Palenzuela; P. L. Molkanov; M. Rosenbusch; R. E. Rossel; S. Rothe; L. Schweikhard; M. D. Seliverstov; P. Spagnoletti; C. Van Beveren; M. Veinhard; E. Verstraelen; A. Welker; K. Wendt; F. Wienholtz; R. N. Wolf; A. Zadvornaya; K. Zuber

doi:10.1103/PhysRevLett.126.032502

Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure

T. Day Goodacre, A. V. Afanasjev, A. E. Barzakh, B. A. Marsh, S. Sels, P. Ring, H. Nakada, A. N. Andreyev, P. Van Duppen, N. A. Althubiti, B. Andel, D. Atanasov, J. Billowes, K. Blaum, T. E. Cocolios, J. G. Cubiss, G. J. Farooq-Smith, D. V. Fedorov, V. N. Fedosseev, K. T. FlanaganL. P. Gaffney, L. Ghys, M. Huyse, S. Kreim, D. Lunney, K. M. Lynch, V. Manea, Y. Martinez Palenzuela, P. L. Molkanov, M. Rosenbusch, R. E. Rossel, S. Rothe, L. Schweikhard, M. D. Seliverstov, P. Spagnoletti, C. Van Beveren, M. Veinhard, E. Verstraelen, A. Welker, K. Wendt, F. Wienholtz, R. N. Wolf, A. Zadvornaya, K. Zuber

Department of Physics

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Abstract

The mean-square charge radii of Hg207,208 (Z=80, N=127, 128) have been studied for the first time and those of Hg202,203,206 (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.

Original language	English
Article number	032502
Journal	Physical Review Letters
Volume	126
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.126.032502
State	Published - 22 Jan 2021

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Day Goodacre, T., Afanasjev, A. V., Barzakh, A. E., Marsh, B. A., Sels, S., Ring, P., Nakada, H., Andreyev, A. N., Van Duppen, P., Althubiti, N. A., Andel, B., Atanasov, D., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., ... Zuber, K. (2021). Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure. Physical Review Letters, 126(3), Article 032502. https://doi.org/10.1103/PhysRevLett.126.032502

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title = "Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure",

abstract = "The mean-square charge radii of Hg207,208 (Z=80, N=127, 128) have been studied for the first time and those of Hg202,203,206 (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.",

author = "{Day Goodacre}, T. and Afanasjev, {A. V.} and Barzakh, {A. E.} and Marsh, {B. A.} and S. Sels and P. Ring and H. Nakada and Andreyev, {A. N.} and {Van Duppen}, P. and Althubiti, {N. A.} and B. Andel and D. Atanasov and J. Billowes and K. Blaum and Cocolios, {T. E.} and Cubiss, {J. G.} and Farooq-Smith, {G. J.} and Fedorov, {D. V.} and Fedosseev, {V. N.} and Flanagan, {K. T.} and Gaffney, {L. P.} and L. Ghys and M. Huyse and S. Kreim and D. Lunney and Lynch, {K. M.} and V. Manea and {Martinez Palenzuela}, Y. and Molkanov, {P. L.} and M. Rosenbusch and Rossel, {R. E.} and S. Rothe and L. Schweikhard and Seliverstov, {M. D.} and P. Spagnoletti and {Van Beveren}, C. and M. Veinhard and E. Verstraelen and A. Welker and K. Wendt and F. Wienholtz and Wolf, {R. N.} and A. Zadvornaya and K. Zuber",

note = "Publisher Copyright: {\textcopyright} 2021 authors.",

year = "2021",

month = jan,

day = "22",

doi = "10.1103/PhysRevLett.126.032502",

language = "English",

volume = "126",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "3",

}

Day Goodacre, T, Afanasjev, AV, Barzakh, AE, Marsh, BA, Sels, S, Ring, P, Nakada, H, Andreyev, AN, Van Duppen, P, Althubiti, NA, Andel, B, Atanasov, D, Billowes, J, Blaum, K, Cocolios, TE, Cubiss, JG, Farooq-Smith, GJ, Fedorov, DV, Fedosseev, VN, Flanagan, KT, Gaffney, LP, Ghys, L, Huyse, M, Kreim, S, Lunney, D, Lynch, KM, Manea, V, Martinez Palenzuela, Y, Molkanov, PL, Rosenbusch, M, Rossel, RE, Rothe, S, Schweikhard, L, Seliverstov, MD, Spagnoletti, P, Van Beveren, C, Veinhard, M, Verstraelen, E, Welker, A, Wendt, K, Wienholtz, F, Wolf, RN, Zadvornaya, A & Zuber, K 2021, 'Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure', Physical Review Letters, vol. 126, no. 3, 032502. https://doi.org/10.1103/PhysRevLett.126.032502

TY - JOUR

T1 - Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes

T2 - Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure

AU - Day Goodacre, T.

AU - Afanasjev, A. V.

AU - Barzakh, A. E.

AU - Marsh, B. A.

AU - Sels, S.

AU - Ring, P.

AU - Nakada, H.

AU - Andreyev, A. N.

AU - Van Duppen, P.

AU - Althubiti, N. A.

AU - Andel, B.

AU - Atanasov, D.

AU - Billowes, J.

AU - Blaum, K.

AU - Cocolios, T. E.

AU - Cubiss, J. G.

AU - Farooq-Smith, G. J.

AU - Fedorov, D. V.

AU - Fedosseev, V. N.

AU - Flanagan, K. T.

AU - Gaffney, L. P.

AU - Ghys, L.

AU - Huyse, M.

AU - Kreim, S.

AU - Lunney, D.

AU - Lynch, K. M.

AU - Manea, V.

AU - Martinez Palenzuela, Y.

AU - Molkanov, P. L.

AU - Rosenbusch, M.

AU - Rossel, R. E.

AU - Rothe, S.

AU - Schweikhard, L.

AU - Seliverstov, M. D.

AU - Spagnoletti, P.

AU - Van Beveren, C.

AU - Veinhard, M.

AU - Verstraelen, E.

AU - Welker, A.

AU - Wendt, K.

AU - Wienholtz, F.

AU - Wolf, R. N.

AU - Zadvornaya, A.

AU - Zuber, K.

PY - 2021/1/22

Y1 - 2021/1/22

N2 - The mean-square charge radii of Hg207,208 (Z=80, N=127, 128) have been studied for the first time and those of Hg202,203,206 (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.

AB - The mean-square charge radii of Hg207,208 (Z=80, N=127, 128) have been studied for the first time and those of Hg202,203,206 (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.

UR - http://www.scopus.com/inward/record.url?scp=85099876767&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.126.032502

DO - 10.1103/PhysRevLett.126.032502

M3 - Article

C2 - 33543945

AN - SCOPUS:85099876767

SN - 0031-9007

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

M1 - 032502

ER -

Laser Spectroscopy of Neutron-Rich Hg 207,208 Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure

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