First observation of a high-<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>K</mi></math> band structure in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Er</mi><mprescripts></mprescripts><none></none><mn>162</mn></mmultiscripts></math> and implications in the context of the identical bands phenomenon

P. K. Nayak; S. Mukhopadhyay; S. K. Tandel; R. V. F. Janssens; R. Chakrabarti; A. Chakraborty; R. Raut; Sachin K. Singh; Saket Suman; K. Debnath; A. K. Mondal; R. Shil; S. S. Nayak; Snigdha Pal; Suchorita Paul; S. Chakraborty; Soumik Bhattacharya; S. Panwar; A. Sharma; S. Kundu; P. K. Giri; G. Mukherjee; S. Bhattacharyya; S. S. Ghugre; U. S. Ghosh; K. Mahata; A. Shrivastava

doi:10.1103/fznx-bhp9

First observation of a high- $K$ band structure in ${}^{162}{Er}$ and implications in the context of the identical bands phenomenon

P. K. Nayak ^1,2, S. Mukhopadhyay ^1,2,*,†, S. K. Tandel ³, R. V. F. Janssens ^4,5, R. Chakrabarti ⁶, A. Chakraborty ⁷, R. Raut ⁸, Sachin K. Singh ³, Saket Suman ³ et al.

K. Debnath ⁷, A. K. Mondal⁷, R. Shil ⁷, S. S. Nayak ^2,9, Snigdha Pal ^2,9, Suchorita Paul ^2,9, S. Chakraborty ¹⁰, Soumik Bhattacharya ^2,9, S. Panwar⁹, A. Sharma ⁸, S. Kundu ⁸, P. K. Giri¹¹, G. Mukherjee ^2,9, S. Bhattacharyya ^2,9, S. S. Ghugre⁸, U. S. Ghosh ¹, K. Mahata ^1,2, and A. Shrivastava ^1,2

¹Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
²Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
³Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, Delhi-NCR 201314, India
⁴Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
⁵Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA
⁶Department of Physics, University of Mumbai, Vidyanagari, Mumbai 400098, India
⁷Department of Physics, Siksha Bhavana, Visva-Bharati University, Santiniketan, West Bengal 731235, India
⁸UGC-DAE Consortium for Scientific Research, Kolkata Centre, Kolkata 700098, India
⁹Variable Energy Cyclotron Centre, Kolkata 700064, India
¹⁰Institute of Engineering & Management, Kolkata 700091, India
¹¹State Key Laboratory of Heavy Ion Science and Technology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

^*Contact author: somm@barc.gov.in; somsundarm@gmail.com
^†Present address: Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.

PDF

Phys. Rev. C 114, 014306 – Published 7 July, 2026

DOI: https://doi.org/10.1103/fznx-bhp9

Abstract

The first ever identification of a high- $K$ band structure in ${}^{162}{Er}$ is reported. Based on a $K^{π} = 7^{(-)}$ isomer, it is found to be identical in nature to the corresponding $K^{π} = 7^{-}$ sequence in ${}^{164}{Er}$ up to its highest observed spin. The phenomenon of identical high-K bands built on a two-quasiparticle configuration in an isotopic chain is reported here for the first time. While this is a notable addition to the systematics of known identical bands in nuclei at normal deformation, a satisfactory global understanding of the phenomenon remains elusive.

Physical Review C

Export citation

Export citation

First observation of a high- $K$ band structure in ${}^{162}{Er}$ and implications in the context of the identical bands phenomenon

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Other Options

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

First observation of a high-K band structure in Er162 and implications in the context of the identical bands phenomenon

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

References (Subscription Required)

First observation of a high- $K$ band structure in ${}^{162}{Er}$ and implications in the context of the identical bands phenomenon