Negative parity three-quasiparticle band in 127I

S. Chakraborty; H. P. Sharma; S. S. Tiwary; C. Majumder; P. Banerjee; S. Ganguly; S. Kumar; A. Kumar; A. Kumar; R. P. Singh; S. Muralithar

doi:10.1140/epja/i2018-12540-4

EPJ

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2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A (2018) 54: 112
https://doi.org/10.1140/epja/i2018-12540-4

Regular Article - Experimental Physics

Negative parity three-quasiparticle band in ¹²⁷I

S. Chakraborty¹, H. P. Sharma¹^*, S. S. Tiwary¹, C. Majumder¹, P. Banerjee², S. Ganguly³, S. Kumar⁴, A. Kumar⁵, A. Kumar¹, R. P. Singh⁶ and S. Muralithar⁶

¹ Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, India
² Nuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata, India
³ Department of Physics, Bethune College, Kolkata, India
⁴ Department of Physics and Astrophysics, University of Delhi, New Delhi, India
⁵ Department of Physics, Panjab University, Chandigarh, India
⁶ Nuclear Physics Group, Inter-University Accelerator Centre, New Delhi, India

^* e-mail: hpsharma_07@yahoo.com

Received: 12 March 2018
Accepted: 21 May 2018
Published online: 28 June 2018

Abstract

The excited states of ¹²⁷I were populated via ¹²⁴Sn(⁷Li, 4n $\gamma$ ) fusion-evaporation reaction at $E_{beam} = 33$ MeV. A strongly coupled $\Delta I = 1$ band has been established above 2423keV state with $J^{\pi} = 19/2^{-}$ as bandhead, likely to be associated with the three-quasiparticle configuration. Spin and parity of these multi-quasiparticle states have been confirmed from DCO ratio and linear polarization asymmetry of depopulating $\gamma$ -rays. The parity of these states have been found altered from their previous assignment.