Collective excitations in S33

Abhijit Bisoi, M. Saha Sarkar, S. Sarkar, S. Ray, D. Pramanik, R. Kshetri, Somnath Nag, K. Selvakumar, P. Singh, A. Goswami, S. Saha, J. Sethi, T. Trivedi, B. S. Naidu, R. Donthi, V. Nanal, and R. Palit
Phys. Rev. C 90, 024328 – Published 29 August 2014

Abstract

High spin states of S33 populated through 27Al(12C,αpn)S33 reaction at E(C12)=40 MeV have been studied using the Indian National Gamma Array (INGA) facility. The level scheme was extended and modified utilizing data from the γγ coincidence, directional correlation, and linear polarization measurements. Three levels of the negative parity yrast sequence were found to be connected by strong E2 transitions. The lifetimes of these states determined by the Doppler shift attenuation method have been utilized to study the evolution of collectivity with spin. Large basis shell model calculations have been performed to understand the microscopic origin of these levels.

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  • Received 15 May 2014
  • Revised 15 July 2014

DOI:https://doi.org/10.1103/PhysRevC.90.024328

©2014 American Physical Society

Authors & Affiliations

Abhijit Bisoi1, M. Saha Sarkar1,*, S. Sarkar2, S. Ray1, D. Pramanik2, R. Kshetri1,†, Somnath Nag3, K. Selvakumar3, P. Singh3, A. Goswami1, S. Saha4, J. Sethi4, T. Trivedi4, B. S. Naidu4, R. Donthi4, V. Nanal4, and R. Palit4

  • 1Saha Institute of Nuclear Physics, Bidhannagar, Kolkata 700064, India
  • 2Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, India
  • 3Indian Institute of Technology, Kharagpur 721302, India
  • 4Tata Institute of Fundamental Research, Mumbai 400005, India

  • *maitrayee.sahasarkar@saha.ac.in
  • Present address: Sidho-Kanho-Birsha University, Purulia 723101, India.

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Vol. 90, Iss. 2 — August 2014

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