Lifetimes of two- and four-neutron-hole states in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Pb</mi><mprescripts></mprescripts><none></none><mn>204</mn></mmultiscripts></math> and <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Pb</mi><mprescripts></mprescripts><none></none><mn>206</mn></mmultiscripts></math>

Saket Suman; S. K. Tandel; Jay Kaushik; M. Hemalatha; V. Bothe; Cenxi Yuan; Noritaka Shimizu; P. Chowdhury; R. V. F. Janssens; F. G. Kondev; M. P. Carpenter; T. Lauritsen; D. Seweryniak

doi:10.1103/11z7-2b3t

Lifetimes of two- and four-neutron-hole states in ${}^{204}{Pb}$ and ${}^{206}{Pb}$

Saket Suman ^1,*, S. K. Tandel ^1,2,†, Jay Kaushik ¹, M. Hemalatha ³, V. Bothe ⁴, Cenxi Yuan ⁵, Noritaka Shimizu ⁶, P. Chowdhury², R. V. F. Janssens ^7,8 et al.

F. G. Kondev ⁹, M. P. Carpenter⁹, T. Lauritsen⁹, and D. Seweryniak⁹

¹Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, Delhi-NCR 201314, India
²Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
³Department of Physics, University of Mumbai, Mumbai 400098, India
⁴Max-Planck-Institut fur Kernphysik, Postfach 103980, 69029 Heidelberg, Germany
⁵Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, China
⁶Center for Computational Sciences, University of Tsukuba, Tennodai, Tsukuba 305-8577, Japan
⁷Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
⁸Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
⁹Argonne National Laboratory, Argonne, Illinois 60439, USA

^*Present address: Department of Physics “E. Pancini”, University of Naples Federico II, 80126 Naples, Italy; National Institute of Nuclear Physics (INFN), 80126 Naples, Italy.
^†Contact author: sujit.tandel@snu.edu.in, sktandel@gmail.com

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Phys. Rev. C 113, 014321 – Published 22 January, 2026

DOI: https://doi.org/10.1103/11z7-2b3t

Abstract

The centroid-shift method was used to determine half-lives of excited levels in ${}^{204}{Pb}$ and ${}^{206}{Pb}$ . For the states with $I^{π} = 12^{+}$ , $17^{-}$ , and $19^{-}$ in ${}^{204}{Pb}$ , values of $T_{1 / 2} = 4.9 (3)$ , 3.9(3), and 0.9(3) ns, respectively, were determined. The half-life of the $I^{π} = 9^{-}$ level in ${}^{206}{Pb}$ was measured to be 1.1(3) ns. In ${}^{204}{Pb}$ , the $12^{+}$ state arises from two neutron holes in the $i_{13 / 2}$ subshell, while the $17^{-}$ and $19^{-}$ levels are built on $ν (i_{13 / 2}^{- 3}, p_{1 / 2}^{- 1})$ and $ν (i_{13 / 2}^{- 3}, f_{5 / 2}^{- 1})$ four-neutron-hole configurations, respectively. The $9^{-}$ state in ${}^{206}{Pb}$ results from a $ν (i_{13 / 2}^{- 1}, f_{5 / 2}^{- 1})$ excitation. The transition probabilities for the decay of these isomeric levels are reasonably consistent with the expected single-particle values, and these states are described well by shell-model calculations using the kshell code with the KHHE interaction.

Physical Review C

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Lifetimes of two- and four-neutron-hole states in ${}^{204}{Pb}$ and ${}^{206}{Pb}$

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Lifetimes of two- and four-neutron-hole states in Pb204 and Pb206

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Lifetimes of two- and four-neutron-hole states in ${}^{204}{Pb}$ and ${}^{206}{Pb}$