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Wobbling Motion in Nuclei: Transverse, Longitudinal, and Chiral

  • Book
  • © 2022

Overview

Authors:
  1. Nirupama Sensharma

    1. Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, USA

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  • Nominated as an outstanding PhD thesis by the University of Notre Dame, USA
  • Presents new wobbling observations, including coexisting longitudinal and transverse wobbling modes in a single nucleus
  • Establishes nuclear triaxiality as a general phenomenon in different regions of the nuclear chart

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (6 chapters)

  1. Front Matter

    Pages i-xvii
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  2. Background and Motivation

    • Nirupama Sensharma
    Pages 1-9

  3. Theory

    • Nirupama Sensharma
    Pages 11-36

  4. Experimental Details

    • Nirupama Sensharma
    Pages 37-62

  5. Analysis

    • Nirupama Sensharma
    Pages 63-95

  6. Results and Theoretical Discussion

    • Nirupama Sensharma
    Pages 97-115

  7. Updates and Future Work

    • Nirupama Sensharma
    Pages 117-118

  8. Back Matter

    Pages 119-142
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Keywords

About this book

This thesis presents significant new observations of nuclear wobbling, and thus expands our understanding of nuclear triaxiality and its prevalence in the nuclear chart. Triaxial nuclear shapes are a very rare phenomena and their experimental identification often relies on two unique signatures – nuclear wobbling motion and chiral rotation. While nuclear chirality is a well-studied phenomenon, experimental observations of wobbling nuclei are rather limited. With the identification of 135Pr and 187Au as wobblers, this work establishes triaxiality to be a general phenomenon present in different regions of the nuclear chart, irrespective of any particular spin or deformation. A major focus of this work is the detailed investigation of the different kinds of wobbling modes. Depending on the geometry of the nuclear system, wobbling can be classified into two types – longitudinal and transverse. This work has, for the first time, reported evidence of the possible coexistence of both forms of wobbling in a single nucleus. Another important result reported in this work is the very first observation of co-existing chiral and wobbling modes in the 135Pr nucleus. This thesis details the experimental methods that led to this breakthrough, along with pertinent theoretical interpretations.

Authors and Affiliations

  • Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, USA

    Nirupama Sensharma

About the author

Nirupama Sensharma is a Postdoctoral Associate at the Department of Physics and Astronomy at the University of North Carolina at Chapel Hill. She graduated from the University of Delhi in India with a bachelor's degree in physics and a master's degree in nuclear science and technology. In 2015, she joined the University of Notre Dame in Indiana as a graduate student and graduated in 2021 with a PhD in Nuclear Physics. Her research primarily focuses on the use of gamma spectroscopic techniques to study the exotic phenomena of wobbling motion and chiral rotation exhibited by triaxial nuclei.  

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