Wobbling motion in nuclei : transverse, longitudinal, and chiral / Nirupama Sensharma.
Sensharma, Nirupama, author.
2022
QC793.3.S6
Available Online

Linked e-resources

Linked Resource Online Access
Concurrent users Unlimited
Authorized users Authorized users
Document Delivery Supplied Can lend chapters, not whole ebooks

Details

Title Wobbling motion in nuclei : transverse, longitudinal, and chiral / Nirupama Sensharma.
Author Sensharma, Nirupama, author.
ISBN 9783031171505 (electronic bk.)
3031171500 (electronic bk.)
9783031171499
3031171497
DOI https://doi.org/10.1007/978-3-031-17150-5
Published Cham : Springer, [2022]
Copyright ©2022
Language English
Description 1 online resource (xvii, 142 pages) : illustrations (chiefly color).
Item Number 10.1007/978-3-031-17150-5 doi
Call Number QC793.3.S6
Dewey Decimal Classification 539.7/25
Summary 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.
Note "Doctoral thesis accepted by University of Notre Dame, USA."
Bibliography, etc. Note Includes bibliographical references.
Access Note Access limited to authorized users.
Source of Description Online resource; title from PDF title page (SpringerLink, viewed December 15, 2022).
Series Springer theses.
Available in Other Form Print version: 9783031171499
Linked Resources Online Access
Record Appears in Online Resources > Ebooks
All Resources
Intro
Supervisors' Foreword
Acknowledgments
Contents
Parts of This Thesis Have Been Published in the Following Journal Articles
Symbols
1 Background and Motivation
1.1 Nuclear Deformations
1.2 Nuclear Triaxiality
1.2.1 Nuclear Wobbling Motion
1.2.2 Chirality of Nuclear Rotation
1.3 Motivation for Studying 135Pr Nucleus
1.4 Motivation for Studying 187Au Nucleus
References
2 Theory
2.1 Nuclear Shell Model
2.1.1 Harmonic Oscillator Potential
2.1.2 Woods-Saxon Potential
2.2 Nuclear Shapes and the Deformed Shell Model
2.3 Collective Rotation

2.3.1 Rotation About a Principal Axis
2.3.2 Rotation About a Tilted Axis
2.3.3 Rotation Out of the Principal Planes
2.4 Wobbling Modes in Nuclei
2.4.1 Wobbling in Even-Even Nuclei
2.4.2 Wobbling in Odd-A Nuclei
2.4.2.1 Longitudinal and Transverse Wobbling Bands
2.4.2.2 Yrast and Signature Partner Bands
2.5 Chiral Rotation in Nuclei
2.6 Nuclear Models to Study Wobbling Motion
2.6.1 Particle Rotor Model
2.6.2 Quasiparticle Triaxial Rotor Model
2.6.3 Triaxial Projected Shell Model
2.7 Theory of Angular Distributions
References
3 Experimental Details

3.1 Interaction of Gamma Rays with Matter
3.2 Gamma-Ray Spectroscopy with Germanium Detectors
3.2.1 High Purity Germanium (HPGe) Detectors
3.2.2 Response Function of HPGe Spectra
3.2.3 Compton Suppression
3.2.4 The Gammasphere Array
3.2.4.1 Honeycomb Suppression Used in Gammasphere
3.2.4.2 Digital Gammasphere Acquisition System
3.3 Angular Distributions and DCO-Ratios
3.4 Reduced Transition Probability Ratios
3.5 Heavy-Ion Fusion-Evaporation Reactions
3.5.1 Beam and Target Specifications
3.6 ATLAS
3.7 Run Details
3.7.1 135Pr Run
3.7.2 187Au Runs

3.7.3 Chiral Wobbler Run
3.8 Pre-Calibration with Digital Gammasphere Data
3.9 Energy and Efficiency Calibrations
References
4 Analysis
4.1 Data Sorting Into Matrices and Cubes
4.2 Background Subtraction Techniques
4.3 Coincidence Relationships and Level Schemes
4.3.1 135Pr
4.3.2 187Au
4.4 Spin and Parity Assignments
4.4.1 Angular Distributions and DCO-Like Ratios
4.4.1.1 135Pr
4.4.1.2 187Au
References
5 Results and Theoretical Discussion
5.1 Two-Phonon Wobbling in 135Pr
5.2 Wobbling Motion in 187Au
5.2.1 Longitudinal Wobbling Bands

5.2.2 Transverse Wobbling Bands
5.3 Chiral Wobbling in 135Pr
References
6 Updates and Future Work
6.1 Updates
6.2 Future Work
References
A Gammasphere Detector and Ring Information
B Digital Gammasphere Calibration Parameters
C Gammasphere Energy and Efficiency Calibration Parameters
Curriculam vitae of Nirupama Sensharma

Browse Subjects

Show more subjects...

Statistics

from
to
Export