The document provides an overview of basic nuclear physics concepts including atomic structure, isotopes, and nuclear stability. It defines the key subatomic particles that make up atoms - protons, neutrons, and electrons. The nucleus is made up of protons and neutrons, while electrons orbit the nucleus. The number of protons determines the element, while isotopes of an element have different numbers of neutrons. For nuclei to be stable there needs to be a roughly 1:1.5 ratio of protons to neutrons, following the "line of stability". Unstable nuclei are radioactive and decay over time to reach stability.
Nuclear Isomerism
A nuclear isomer is a metastable state of an atomic nucleus caused by the excitation of one or more of its nucleons (protons or neutrons). "
"Metastable" refers to the property of these nuclei whose excited states have half-lives longer than 100 to 1000 times the half-lives of the excited nuclear states that decay with a "prompt" half life (ordinarily on the order of 10−12 seconds). As a result, the term "metastable" is usually restricted to isomers with half-lives of 10−9 seconds or longer.
Augar Effect
The transition of a nucleus from an excited to the ground state may occur by the EJECTION OF ORBITAL ELECTRONS
It is an alternative GAMMA emission
IF the energy TRANSFERRED to the electrons in this process exceeds the electron binding energy EB ,The electron is ejected with a kinetic ENERGY
Ee =E - EBThe transition of a nucleus from an excited to the ground state may occur by the EJECTION OF ORBITAL ELECTRONS
It is an alternative GAMMA emission
IF the energy TRANSFERRED to the electrons in this process exceeds the electron binding energy EB ,The electron is ejected with a kinetic ENERGY
Thankyou....
Nuclear Isomerism
A nuclear isomer is a metastable state of an atomic nucleus caused by the excitation of one or more of its nucleons (protons or neutrons). "
"Metastable" refers to the property of these nuclei whose excited states have half-lives longer than 100 to 1000 times the half-lives of the excited nuclear states that decay with a "prompt" half life (ordinarily on the order of 10−12 seconds). As a result, the term "metastable" is usually restricted to isomers with half-lives of 10−9 seconds or longer.
Augar Effect
The transition of a nucleus from an excited to the ground state may occur by the EJECTION OF ORBITAL ELECTRONS
It is an alternative GAMMA emission
IF the energy TRANSFERRED to the electrons in this process exceeds the electron binding energy EB ,The electron is ejected with a kinetic ENERGY
Ee =E - EBThe transition of a nucleus from an excited to the ground state may occur by the EJECTION OF ORBITAL ELECTRONS
It is an alternative GAMMA emission
IF the energy TRANSFERRED to the electrons in this process exceeds the electron binding energy EB ,The electron is ejected with a kinetic ENERGY
Thankyou....
Detection of Radioactivity
Characteristics of the Three Types of Emission
Nuclear Reactions
Half-Life
Uses of Radioactive Isotopes Including Safety Precautions
A particle accelerator
Sends charged particles, which constantly accelerate through a ‘Dee’, through a circular path until they are (most likely) directed towards a designated target for a specific purpose
Energy Absorption in Radiobiology
Ionization vs. Excitation
Ionizing Versus Non-ionizing Radiation
Absorption Mechanisms
Ionization by alpha particle, Xray & neutron
Detection of Radioactivity
Characteristics of the Three Types of Emission
Nuclear Reactions
Half-Life
Uses of Radioactive Isotopes Including Safety Precautions
A particle accelerator
Sends charged particles, which constantly accelerate through a ‘Dee’, through a circular path until they are (most likely) directed towards a designated target for a specific purpose
Energy Absorption in Radiobiology
Ionization vs. Excitation
Ionizing Versus Non-ionizing Radiation
Absorption Mechanisms
Ionization by alpha particle, Xray & neutron
Objective Capital Rare Earths, Speciality and Minor Metals Investment Summit
Focus on rare earths projects around the world
A diversified exposure – rare earths, niobium & zirconium
18 March 2010
by Ian Chalmers, Alkane Resources
This slides are related to nuclear physics. Introduction of nuclear energy is given in this slides and some more topics with examples is given for detail about isotopes binding energy types of forces etc
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
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Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
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Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
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A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
2. IAEA
Objective
• To discuss about the structure of the atom
including the Neutron, Proton and
Electron
• To learn about the Atomic Number,
Atomic Mass, nuclear stability and
radioactive or unstable nuclei
2
7. IAEA
Nucleus
Protons and neutrons together
form the nucleus of the atom.
The nucleus determines the
identity of the element and its
atomic mass.
Proton and neutrons have essentially the same mass but
only the proton is charged while the neutron has no
charge.
7
8. IAEA
Protons
Protons are positively charged
particles found inside the nucleus
of an atom. Each element has a
unique atomic number (a unique
number of protons).
Proton number never changes for any given element. For
example, oxygen has an atomic number of 8 indicating
that oxygen always has 8 protons.
8
9. IAEA
Neutrons
Neutrons are the other particle
found in the nucleus of an atom.
Unlike protons and electrons,
however, neutrons carry no
electrical charge and are thus
"neutral."
Atoms of a given element do not always contain the same
number of neutrons.
9
10. IAEA
Electrons
Electrons are negatively charged
particles that surround the nucleus
in “orbits” similar to moons orbiting
a planet.
The sharing or exchange of electrons between atoms
forms chemical bonds which is how new molecules and
compounds are formed.
10
11. IAEA
ELECTRON BINDING ENERGY
• Electrons exist in discrete “shells” around the
nucleus (similar to planets around the sun)
• Each shell represents a unique binding energy
holding the electron to the nucleus
• The shells are designated by letters (K, L, M,
N …) where K, the shell closest to the nucleus,
has the largest binding energy, so the K
electron is the most tightly bound
• Maximum number of electrons in each shell: 2
in K shell, 8 in L shell …
12. IAEA
Particle Symbol Mass (kg) Energy (MeV) Charge
Proton p 1.672E-27 938.2 +1
Neutron n 1.675E-27 939.2 0
Electron e 0.911E-30 0.511 -1
Summary of the Atom
13. IAEA
Atomic Mass Unit (amu)
Where 1 amu is
approximately equal to
1.6605 x 10-24 grams
13
14. IAEA
Atomic Mass Unit (amu)
The atomic mass of the proton and the neutron is
approximately:
Proton = 1.6726 x 10-24 grams = 1.0073 amu
Neutron = 1.6749 x 10-24 grams = 1.0087 amu
Thus, the neutron is just a little heavier than the
proton.
15. IAEA
Atomic Mass Unit (amu)
The difference in the mass of the neutron and the
proton can be understood if we assume that the
neutron is merely a proton combined with an
electron forming a neutral particle slightly more
massive than a proton alone.
15
16. IAEA
Atomic Mass Unit (amu)
The atomic mass of the electron is approximately:
Electron = 9.1094 x 10-28 grams = 0.00055 amu
Thus, the electron has a much smaller mass than
either the proton or the neutron, 1837 times
smaller or about 2000 times smaller.
17. IAEA
Elements
The number of protons in an atom dictate the
element.
For an uncharged atom, the number of
electrons equals the number of protons.
18. IAEA
10 Most Abundant Elements
Element Symbol Protons Relative % of Earth’s Mass
Oxygen O 8 46.6
Silicon Si 14 27.7
Aluminum Al 13 8.1
Iron Fe 26 5.0
Calcium Ca 20 3.6
Sodium Na 11 2.8
Potassium K 19 2.6
Magnesium Mg 12 2.1
Titanium Ti 22 0.4
Hydrogen H 1 0.1
18
19. IAEA
In 1869, Russian chemist Dmitri
Mendeleev first described an
arrangement of the chemical
elements now known as the
periodic table.
The periodic table displays all
chemical elements systematically
in order of increasing atomic
number (the number of protons in
the nucleus).
Periodic Table of the Elements
19
22. IAEA
Sample Element - Zirconium
40
Zr
Zirconium
91.2
Electron Shell Configuration:
K 1s-2 2
L 2s-2 2p-6 8
M 3s-2 3p-6 3d-10 18
N 4s-2 4p-6 4d- 2 10
O 5s-2 2
10 + 18 + 12 = 40
K
L
M
N
O
22
23. IAEA
Sample Element - Zirconium
Name: Zirconium
Symbol: Zr
Atomic Number: 40
Atomic Mass: 91.224 amu
Melting Point: 1852.0 °C
Boiling Point: 4377.0 °C
No. of Protons/Electrons: 40
No. of Neutrons: 51
Classification: Transition Metal
Phase at Room Temperature: Solid
Density @ 293 K: 6.49 g/cm3
Color: Grayish
Date of Discovery: 1789
Discoverer: Martin Klaproth
23
24. IAEA
Isotopes
Atoms of an element
that have a different
number of neutrons
in the nucleus are
called isotopes of
each other.
Xy
Z
A
Xy = element symbol
A = atomic mass (neutron + protons)
Z = atomic number (protons)
isotope notation
typically written as:
24
26. IAEA
Isotopes
There are many
isotopes. Most have
more neutrons than
protons. Some are
stable but most are
unstable
(radioactive).
equal number of protons and neutrons
26
27. IAEA
Nuclear Stability
• A stable or non-radioactive nuclide is one
whose atoms do not decay
• If one plots the stable nuclei, an interesting
pattern emerges (shown in next slide)
• The graph in the next slide shows a plot of
neutron number N vs atomic number Z for
the stable nuclei
27
29. IAEA
Nuclear Stability
For the heaviest stable nuclei, N is about
1.5 times Z
The presence of the extra neutrons
overcomes the positively charged protons’
tendency to repel each other and disrupt
the nucleus
The nucleus is held together by a poorly
understood force, the Nuclear Force
29
30. IAEA
The nuclear force is an extremely short-
range force
It acts over a maximum distance of about
two proton diameters
The nuclear force is responsible for the
binding energy that holds the nucleus
together
Nuclear Stability
30
31. IAEA
Nuclei which do not fall on the line of stability
tend to be unstable or “radioactive”
They are called “radionuclides”
A few radionuclides do fall on the line of
stability but their rate of decay is so slow that
for all practical purposes they are stable
Unstable Nuclei
31
32. IAEA
Radionuclides undergo a process called
radioactive transformation or disintegration
In this process, the nucleus emits particles to
adjust its neutron (N) to proton (Z) ratio
This change in the N to Z ratio tends to move
the radionuclide toward the line of stability
Unstable Nuclei
32
33. IAEA
Some Common Radionuclides
Naturally occurring 235U and 238U
60Co, 137Cs, 90Sr found in nuclear power
plants
192Ir used in radiography
99mTc used in nuclear medicine
131I used in treatment of thyroid conditions
33
35. IAEA
Where to Get More Information
Cember, H., Johnson, T. E, Introduction to Health
Physics, 4th Edition, McGraw-Hill, New York (2009)
International Atomic Energy Agency, Postgraduate
Educational Course in Radiation Protection and the
Safety of Radiation Sources (PGEC), Training Course
Series 18, IAEA, Vienna (2002)
35