Keywords:
Electronic books.
Description / Table of Contents:
This book discusses in detail the phenomena of Pre-equilibrium emission in statistical nuclear reactions. It is intended to help early-career nuclear physicists and doctoral students to understand the phenomenon of pre-equilibrium emission in nuclear reactions. It is ideal for postgraduate students studying accelerator-based experimental physics and dedicated researchers working in the field of nuclear reaction studies.
Type of Medium:
Online Resource
Pages:
1 online resource (260 pages)
Edition:
1st ed.
ISBN:
9780750350792
Series Statement:
IOP Ebooks Series
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=31252906
Language:
English
Note:
Intro -- Preface -- Acknowledgments -- Author biographies -- Professor B P Singh -- Professor Manoj K Sharma -- Professor R Prasad -- Symbols -- Symbols -- Chapter 1 Introduction to the history of nuclear reactions and motivation for this book -- 1.1 Background -- 1.2 Nuclear atom -- 1.3 The first transmutation reaction -- 1.4 Discovery of neutron -- 1.5 Artificial radioactivity -- 1.6 Strong nuclear force -- 1.7 New isotopes -- 1.8 Discovery of fission -- 1.9 Self-sustained fission chain reaction -- 1.10 Fusion reaction -- 1.11 Accelerators -- 1.12 Particle accelerators in India -- 1.13 Radiation detectors -- 1.14 Study of reaction mechanism -- 1.15 Statistical reactions -- 1.16 Experimental verification of independence of formation and decay of compound nucleus -- 1.17 Particle spectra -- 1.18 Experimentally measured energy spectrum of ejectiles -- 1.19 Motivation -- Bibliography -- Chapter 2 Characteristics of binary nuclear reactions -- 2.1 Introduction -- 2.2 Classification of nuclear reactions -- 2.3 Conservation laws for nuclear reactions -- 2.4 Quantities not conserved in nuclear reactions -- 2.5 Nuclear reactions versus chemical reactions -- 2.6 Energetics of nuclear reactions -- 2.7 Centre-of-mass frame of reference -- 2.8 Cross-section -- 2.8.1 Nuclear scattering cross-section -- 2.8.2 Experimental determination of nuclear reaction cross-section -- 2.8.3 Experimental requirements for nuclear reaction studies -- Bibliography -- Chapter 3 Theoretical formulation of compound and pre-compound emission -- 3.1 Introduction -- 3.2 Compound reaction mechanism -- 3.3 Verification of Bohr's independent hypothesis -- 3.4 Theoretical formulation -- 3.4.1 Parameters of the entrance channel -- 3.4.2 Parameters of exit channel -- 3.5 Hauser-Feshbach formulations -- 3.6 Weisskopf-Ewing formulation -- 3.7 Nuclear level density.
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3.7.1 Models for level density -- 3.7.2 Sources of information about level density -- 3.7.3 Parameterization -- 3.8 Pre-equilibrium emission -- 3.8.1 Some early evidence of pre-equilibrium emission -- Bibliography -- Chapter 4 Models for pre-equilibrium emission -- 4.1 Introduction -- 4.2 Intra-nuclear cascade model (INC) -- 4.3 The exciton model -- 4.3.1 The state densities -- 4.3.2 Equilibrium solution of master equation -- 4.3.3 Integrated emission rates -- 4.3.4 Never-come-back approximation -- 4.3.5 Gamma emission -- 4.3.6 Emission of protons and neutrons -- 4.3.7 Two-component exciton states -- 4.3.8 Conservation of angular momentum -- 4.3.9 The generalised exciton model -- 4.3.10 Question mark about the assumption of exciton model -- 4.4 Harp-Miller-Berne (HMB) model -- 4.5 Hybrid model -- 4.5.1 Geometry dependent hybrid model -- 4.6 Quantum mechanical model for pre-equilibrium process -- 4.6.1 MSD theory of FKK -- 4.6.2 Multi-step compound processes (MSCs) -- 4.7 Computer codes -- Bibliography -- Chapter 5 Experimental measurements -- 5.1 Introduction -- 5.2 Neutron induced reactions -- 5.2.1 Measurement and analysis of cross-sections -- 5.2.2 Measurements and analysis of energy spectra of light charged particles -- 5.3 Proton induced reactions -- 5.3.1 Measurements and analysis of EFs -- 5.3.2 Measurement and analysis of energy spectra of neutrons -- 5.4 Alpha induced reactions -- 5.4.1 Measurement and analysis of EFs -- 5.4.2 Measurements of neutron energy spectra in α,xn reactions -- 5.5 Heavy-ion induced reactions -- 5.5.1 Measurement and analysis of EFs with 7Li and 11B beams: 7Li+93Nb -- 7Li+89Y and 11B+181Ta systems -- 5.5.2 Measurement and analysis of EFs with 12C beam: 12C+169Tm, 12C+128Te and 12C+ 197Au systems.
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5.5.3 Measurement and analysis of EFs with 14N, 16O, and 19F beams: 14N+181Ta, 16O+159Tb, 16O+169Tm, 16O+181Ta and 19F+169Tm systems -- 5.5.4 Pre-equilibrium emission from recoil range distribution: 16O+159Tb system -- 5.6 In-beam studies of the pre-equilibrium emission -- 5.6.1 Forward-to-backward yield ratios of reaction residues -- 5.6.2 Spin distribution and angular momentum -- Bibliography -- Chapter 6 Data analysis, parameterisation of pre-equilibrium fraction -- 6.1 Introduction -- 6.2 Pre-equilibrium fraction -- 6.3 Energy dependence in light-particle-induced reactions -- 6.3.1 In-proton-induced reactions -- 6.3.2 In α-induced reactions -- 6.4 Dependence of relative magnitudes of ƒR and ƒCN on energy -- 6.5 Systematics of pre-equilibrium fraction in odd Z and odd A nuclei -- 6.5.1 In the case of A = 139-203 nuclei -- 6.5.2 In case of A = 63-109 nuclei -- 6.6 Systematics for heavy-ion induced reactions -- 6.7 Pre-equilibrium component from recoil range distribution (RRD) -- 6.8 Pre-equilibrium component from spin distribution measurement -- 6.9 Pre-equilibrium emission and synthesis of SHE -- 6.10 Future perspective -- Bibliography.
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