Conclusive evidence of a two-neutron multiphonon transverse wobbling mode in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Kr</mi><mprescripts></mprescripts><none></none><mn>82</mn></mmultiscripts></math>

S. Rajbanshi; R. Palit; Habibur Rahaman; G. Manna; Sajad Ali; S. Chakraborty; G. H. Bhat; S. Jehangir; J. A. Sheikh; F. S. Babra; R. Banik; S. Bhattacharya; S. Bhattacharyya; P. Dey; Md. S. R. Laskar; G. Mukherjee; S. Nandi; H. Pai; Rajkumar Santra; T. Trivedi

doi:10.1103/PhysRevC.111.L061301

Letter

Conclusive evidence of a two-neutron multiphonon transverse wobbling mode in ${}^{82}{Kr}$

S. Rajbanshi ^1,*, R. Palit ², Habibur Rahaman^1,3, G. Manna^4,5, Sajad Ali ⁶, S. Chakraborty ^7,8, G. H. Bhat ⁹, S. Jehangir ¹⁰, J. A. Sheikh ¹⁰ et al.

F. S. Babra², R. Banik⁸, S. Bhattacharya ¹¹, S. Bhattacharyya ^7,12, P. Dey ², Md. S. R. Laskar ⁷, G. Mukherjee ^7,12, S. Nandi ¹³, H. Pai ¹⁴, Rajkumar Santra ¹⁵, and T. Trivedi ¹⁶

¹Presidency University, Kolkata 700073, India
²Tata Institute of Fundamental Research, Mumbai 400005, India
³Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
⁴Department of Physics, Bankura University, Bankura 722155, India
⁵Mugberia Gangadhar Mahavidyalaya, Purba Medinipur 721425, India
⁶Government General Degree College at Pedong, Kalimpong 734311, India
⁷Variable Energy Cyclotron Centre, Kolkata 700064, India
⁸Institute of Engineering and Management, Kolkata 700091, India
⁹Department of Physics, GDC Shopian, Jammu and Kashmir 192303, India
¹⁰Department of Physics, Islamic University of Science and Technology, Jammu and Kashmir 192122, India
¹¹The Hebrew University of Jerusalem, Jerusalem 91904, Israel
¹²Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
¹³Subatech, Nantes University, IMT Atlantique, IN2P3/CNRS, 4 Rue Alfred Kastler, 44307 Nantes Cedex 3, France
¹⁴Extreme Light Infrastructure - Nuclear Physics, “Horia Hulubei” National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului Street, 077125 Magurele, Romania
¹⁵University of Calcutta, Kolkata 700073, India
¹⁶Department of Physics, University of Allahabad, Prayagraj 211002, India

^*Contact author: subhphy@gmail.com

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Phys. Rev. C 111, L061301 – Published 2 June, 2025

DOI: https://doi.org/10.1103/PhysRevC.111.L061301

Abstract

Positive parity band structures in ${}^{82}{Kr}$ were investigated using the reaction ${}^{76}{Ge}$ ( ${}^{9}{Be}, 3 n$ ) at $E_{Lab} \approx$ 31 MeV with the help of the Indian National Gamma Array. The predominant $E 2$ component of the $Δ I = 1$ band interlinking transitions and the decreasing nature of wobbling energy with spin were observed for the bands TW1 and TW2, reflecting their transverse wobbling character. The absolute $B$ ( $E 2$ ) transition strengths of the zeroth and first phonon wobbling bands as well as the signature partner band were extracted from the lifetime measurements. The extracted $B$ ( $E 2$ ) values in comparison with the triaxial projected shell model calculations confirm similar deformation for the three bands, which is an important characteristic of wobbling modes. This is conclusive evidence of transverse wobbling motion in an even-even nucleus based on a two-neutron configuration and also an observation of wobbling motion in the $A \approx$ 80 mass region.

Physical Review C

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Conclusive evidence of a two-neutron multiphonon transverse wobbling mode in ${}^{82}{Kr}$

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Conclusive evidence of a two-neutron multiphonon transverse wobbling mode in Kr82

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Conclusive evidence of a two-neutron multiphonon transverse wobbling mode in ${}^{82}{Kr}$