First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart

H. Huang; W.Q. Zhang; A.N. Andreyev; Z. Liu; D. Seweryniak; Z.H. Li; C.Y. Guo; A.E. Barzakh; P. Van Duppen; B. Andel; S. Antalic; M. Block; A. Bronis; M.P. Carpenter; P. Copp; J.G. Cubiss; B. Ding; D.T. Doherty; Z. Favier; F. Giacoppo; T.H. Huang; B. Kindler; F.G. Kondev; T. Lauritsen; J.G. Li; G.S. Li; B. Lommel; H.Y. Lu; M. Al Monthery; P. Mošať; Y.F. Niu; C. Raison; W. Reviol; G. Savard; S. Stolze; G.L. Wilson; H.Y. Wu; Z.H. Wang; F.R. Xu; Q.B. Zeng; X.H. Yu; F.F. Zeng; X.H. Zhou

doi:10.1016/j.physletb.2022.137345

First observation of the decay of the 13/2⁺ isomer in ¹⁸³Hg and B(M2) systematics of neutron transitions across the nuclear chart

H. Huang, W.Q. Zhang, A.N. Andreyev, Z. Liu, D. Seweryniak, Z.H. Li, C.Y. Guo, A.E. Barzakh, P. Van Duppen, B. Andel, S. Antalic, M. Block, A. Bronis, M.P. Carpenter, P. Copp, J.G. Cubiss, B. Ding, D.T. Doherty, Z. Favier, F. GiacoppoT.H. Huang, B. Kindler, F.G. Kondev, T. Lauritsen, J.G. Li, G.S. Li, B. Lommel, H.Y. Lu, M. Al Monthery, P. Mošať, Y.F. Niu, C. Raison, W. Reviol, G. Savard, S. Stolze, G.L. Wilson, H.Y. Wu, Z.H. Wang, F.R. Xu, Q.B. Zeng, X.H. Yu, F.F. Zeng, X.H. Zhou

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The decay of the 13/2⁺ isomeric state in ¹⁸³Hg was observed for the first time following the α decay of the 13/2⁺ isomer in ¹⁸⁷Pb produced in the ¹⁴²Nd(⁵⁰Cr, 2p3n) reaction. Using α−γ delayed coincidence measurements, the half-life of this isomer was measured to be 290(30) μs. This isomer is proposed to deexcite by an unobserved low-energy M2 transition to the known 9/2⁻ member of a strongly prolate-deformed 7/2−[514] band, followed by a 105-keV M1 transition to the bandhead. A lower limit of B(M2) ≥ 0.018 W.u. was deduced for the unobserved transition. The presumed retardation is proposed to be due to the notable shape change between the initial, nearly spherical, and the final, strongly deformed, states. A similar scenario is also considered for the 13/2⁺ isomer in ¹⁸¹Hg, suggesting both are cases of shape isomers. The B(M2) systematics of neutron transitions across the nuclear chart is discussed.

Original language	English
Article number	137345
Number of pages	8
Journal	Physics Letters B
Volume	833
Early online date	2 Aug 2022
DOIs	https://doi.org/10.1016/j.physletb.2022.137345
Publication status	Published - 10 Oct 2022

Bibliographical note

Keywords

Isomeric decay
Shape isomer

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Nuclear Physics Consolidated Grant 2021-2024
Jenkins, D., Andreyev, A., Bashkanov, M., Bentley, M., Dobaczewski, J. J., Laird, A. M., Paschalis, S., Pastore, A., Petri, M., Wadsworth, R., Watts, D. & Zachariou, N.
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/10/21 → 31/03/25
Project: Research project (funded) › Research
Nuclear Physics Consolidated Grant
Jenkins, D., Andreyev, A., Bentley, M., Diget, C. A., Dobaczewski, J. J., Fulton, B. R., Laird, A. M., Paschalis, S., Pastore, A., Petri, M. & Wadsworth, R.
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/10/17 → 30/09/22
Project: Research project (funded) › Research

Cite this

Huang, H., Zhang, W. Q., Andreyev, A. N., Liu, Z., Seweryniak, D., Li, Z. H., Guo, C. Y., Barzakh, A. E., Duppen, P. V., Andel, B., Antalic, S., Block, M., Bronis, A., Carpenter, M. P., Copp, P., Cubiss, J. G., Ding, B., Doherty, D. T., Favier, Z., ... Zhou, X. H. (2022). First observation of the decay of the 13/2⁺ isomer in ¹⁸³Hg and B(M2) systematics of neutron transitions across the nuclear chart. Physics Letters B, 833, Article 137345. https://doi.org/10.1016/j.physletb.2022.137345

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title = "First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart",

abstract = "The decay of the 13/2+ isomeric state in 183Hg was observed for the first time following the α decay of the 13/2+ isomer in 187Pb produced in the 142Nd(50Cr, 2p3n) reaction. Using α−γ delayed coincidence measurements, the half-life of this isomer was measured to be 290(30) μs. This isomer is proposed to deexcite by an unobserved low-energy M2 transition to the known 9/2− member of a strongly prolate-deformed 7/2−[514] band, followed by a 105-keV M1 transition to the bandhead. A lower limit of B(M2) ≥ 0.018 W.u. was deduced for the unobserved transition. The presumed retardation is proposed to be due to the notable shape change between the initial, nearly spherical, and the final, strongly deformed, states. A similar scenario is also considered for the 13/2+ isomer in 181Hg, suggesting both are cases of shape isomers. The B(M2) systematics of neutron transitions across the nuclear chart is discussed.",

keywords = "Isomeric decay, Shape isomer",

author = "H. Huang and W.Q. Zhang and A.N. Andreyev and Z. Liu and D. Seweryniak and Z.H. Li and C.Y. Guo and A.E. Barzakh and Duppen, {P. Van} and B. Andel and S. Antalic and M. Block and A. Bronis and M.P. Carpenter and P. Copp and J.G. Cubiss and B. Ding and D.T. Doherty and Z. Favier and F. Giacoppo and T.H. Huang and B. Kindler and F.G. Kondev and T. Lauritsen and J.G. Li and G.S. Li and B. Lommel and H.Y. Lu and Monthery, {M. Al} and P. Mo{\v s}a{\v t} and Y.F. Niu and C. Raison and W. Reviol and G. Savard and S. Stolze and G.L. Wilson and H.Y. Wu and Z.H. Wang and F.R. Xu and Q.B. Zeng and X.H. Yu and F.F. Zeng and X.H. Zhou",

note = "{\textcopyright} 2022 The Author(s). Published by Elsevier B.V",

year = "2022",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2022.137345",

language = "English",

volume = "833",

journal = "Physics Letters B",

issn = "0370-2693",

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Huang, H, Zhang, WQ, Andreyev, AN, Liu, Z, Seweryniak, D, Li, ZH, Guo, CY, Barzakh, AE, Duppen, PV, Andel, B, Antalic, S, Block, M, Bronis, A, Carpenter, MP, Copp, P, Cubiss, JG, Ding, B, Doherty, DT, Favier, Z, Giacoppo, F, Huang, TH, Kindler, B, Kondev, FG, Lauritsen, T, Li, JG, Li, GS, Lommel, B, Lu, HY, Monthery, MA, Mošať, P, Niu, YF, Raison, C, Reviol, W, Savard, G, Stolze, S, Wilson, GL, Wu, HY, Wang, ZH, Xu, FR, Zeng, QB, Yu, XH, Zeng, FF & Zhou, XH 2022, 'First observation of the decay of the 13/2⁺ isomer in ¹⁸³Hg and B(M2) systematics of neutron transitions across the nuclear chart', Physics Letters B, vol. 833, 137345. https://doi.org/10.1016/j.physletb.2022.137345

TY - JOUR

T1 - First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart

AU - Huang, H.

AU - Zhang, W.Q.

AU - Andreyev, A.N.

AU - Liu, Z.

AU - Seweryniak, D.

AU - Li, Z.H.

AU - Guo, C.Y.

AU - Barzakh, A.E.

AU - Duppen, P. Van

AU - Andel, B.

AU - Antalic, S.

AU - Block, M.

AU - Bronis, A.

AU - Carpenter, M.P.

AU - Copp, P.

AU - Cubiss, J.G.

AU - Ding, B.

AU - Doherty, D.T.

AU - Favier, Z.

AU - Giacoppo, F.

AU - Huang, T.H.

AU - Kindler, B.

AU - Kondev, F.G.

AU - Lauritsen, T.

AU - Li, J.G.

AU - Li, G.S.

AU - Lommel, B.

AU - Lu, H.Y.

AU - Monthery, M. Al

AU - Mošať, P.

AU - Niu, Y.F.

AU - Raison, C.

AU - Reviol, W.

AU - Savard, G.

AU - Stolze, S.

AU - Wilson, G.L.

AU - Wu, H.Y.

AU - Wang, Z.H.

AU - Xu, F.R.

AU - Zeng, Q.B.

AU - Yu, X.H.

AU - Zeng, F.F.

AU - Zhou, X.H.

PY - 2022/10/10

Y1 - 2022/10/10

N2 - The decay of the 13/2+ isomeric state in 183Hg was observed for the first time following the α decay of the 13/2+ isomer in 187Pb produced in the 142Nd(50Cr, 2p3n) reaction. Using α−γ delayed coincidence measurements, the half-life of this isomer was measured to be 290(30) μs. This isomer is proposed to deexcite by an unobserved low-energy M2 transition to the known 9/2− member of a strongly prolate-deformed 7/2−[514] band, followed by a 105-keV M1 transition to the bandhead. A lower limit of B(M2) ≥ 0.018 W.u. was deduced for the unobserved transition. The presumed retardation is proposed to be due to the notable shape change between the initial, nearly spherical, and the final, strongly deformed, states. A similar scenario is also considered for the 13/2+ isomer in 181Hg, suggesting both are cases of shape isomers. The B(M2) systematics of neutron transitions across the nuclear chart is discussed.

AB - The decay of the 13/2+ isomeric state in 183Hg was observed for the first time following the α decay of the 13/2+ isomer in 187Pb produced in the 142Nd(50Cr, 2p3n) reaction. Using α−γ delayed coincidence measurements, the half-life of this isomer was measured to be 290(30) μs. This isomer is proposed to deexcite by an unobserved low-energy M2 transition to the known 9/2− member of a strongly prolate-deformed 7/2−[514] band, followed by a 105-keV M1 transition to the bandhead. A lower limit of B(M2) ≥ 0.018 W.u. was deduced for the unobserved transition. The presumed retardation is proposed to be due to the notable shape change between the initial, nearly spherical, and the final, strongly deformed, states. A similar scenario is also considered for the 13/2+ isomer in 181Hg, suggesting both are cases of shape isomers. The B(M2) systematics of neutron transitions across the nuclear chart is discussed.

KW - Isomeric decay

KW - Shape isomer

U2 - 10.1016/j.physletb.2022.137345

DO - 10.1016/j.physletb.2022.137345

M3 - Article

SN - 0370-2693

VL - 833

JO - Physics Letters B

JF - Physics Letters B

M1 - 137345

ER -