Antimatter And Annihilation. Remember Photons? What are photons?

Slides:

Advertisements

Similar presentations

Early Quantum Theory and Models of the Atom

Advertisements

2. The Particle-like Properties Of Electromagnetic Radiation

Einstein’s Energy Mass Equivalence Powers the Sun!

Age vs. Red Shift In the recent past, the universe was dominated by matter The age of the universe now is given by: Recall: x = a/a 0 = 1/(1+z) Time-red-shift.

CHEMISTRY 1000 Topic #4: Nuclear Chemistry Fall 2010 Dr. Susan Lait.

The electromagnetic (EM) field serves as a model for particle fields  = charge density, J = current density.

Energy from fusion - “that” equation. The energy from stars comes from nuclear fusion in the core. Light nuclei fuse together & release energy - it takes.

Statistics of Fermions = Spin ½ Particles (electron, neutron, proton…) obeying the famous Pauli Exclusion Principle no two identical particles can exist.

Positron. Pair Production  Photons above twice the electron rest mass energy can create a electron positron pair. Minimum = ÅMinimum = Å.

Antimatter  The mass of a p is 938MeV/c 2 and its charge is +e. The mass of a  p is __ and its charge is ___ a ) 938MeV/c 2, +e b ) - 938MeV/c 2, +e.

PH 103 Dr. Cecilia Vogel Lecture 24 Review Outline  Nuclei  decay rate and number of nuclei  Matter Particles  leptons & quarks  More Particles.

After their creation, neutrons start to decay and can only be save in atomic nuclei – specifically Helium.

Nuclear Physics E = mc 2. Outline Theory of Special Relativity Postulates E = mc 2 The Atom What makes up the atom? What holds the atom together? Quantum.

Modern Physics The Photoelectric Effect. What is Modern Physics? Modern Physics is what we have discovered and created in the area of Physics in the last.

Nuclear Force and Particles

Astro-2: History of the Universe Lecture 12; May

If the sun is a burning ball of gas … just what gas is it burning? Warmup Question:

Particles & Antiparticles

Goal: To understand the atom Objectives: 1)To learn that The basics of Atomic Physics isn’t so bad 2)To understand the Bohr atom 3)To understand Electron.

What is antimatte r ?.  Antimatter is thought to be the exact same as regular matter, only the charges of the particles are the opposite of what one.

Unit 8 Section 2: Nuclear Reactions

1. ALL POSSIBLE BASIC PARTICLES 2 Vector Electron and Positron 3.

Photo of Particles Interacting within a Bubble Chamber Fermilab bubble chamber: 4.6 m in diameter in a 3 T magnetic field How does a bubble chamber work.

Antimatter Mysteries 1 Rolf Landua Research physicist CERN.

Jeopardy Jeopardy PHY101 Chapter 12 Review Study of Special Relativity Cheryl Dellai.

Chapter 17 The Beginning of Time. Running the Expansion Backward Temperature of the Universe from the Big Bang to the present (10 10 years ~ 3 x

The Big Bang Theory (Part I) How the Universe began. Mike Stuckey Warren East High School.

Modern Physics. Reinventing Gravity  Einstein’s Theory of Special Relativity  Theorizes the space time fabric.  Describes why matter interacts.  The.

SYNTHESIS Space-Time Revisited 1.Antimatter 2.Feynman Diagrams 3.Quantum Electrodynamics.

Electromagnetic radiation behaves as particles 1. Notes of the problem discussed Tuesday. 2. Quiz 9.11 and a few comments on quiz Topics in EM.

The Formation of Matter as we know it. In the Beginning (as science thinks)  All matter existed in a very small space  Very dense  Temperatures were.

We see light as color and brightness It’s actually electromagnetic radiation: Partly electric, partly magnetic Flows in straight line (radiates)

Goal: To understand the history of the universe especially the beginning Objectives: 1)To learn about the beginning of the Big bang! 2)To explore the Big.

PARTICLE PHYSICS Summary Alpha Scattering & Electron Diffraction.

SEMINAR ON ANTIMATTER. INTRODUCTION Antimatter is real. Energy density of chemical reaction is 1×10  J/kg. nuclear fission is 8×10  J/kg. nuclear fusion.

Light: Wave or Particle Chapter 4, Section 1 notes.

1 Mr. ShieldsRegents Chemistry U06 L02 2 H2H2H2H2 We saw that Bohr Was able to equate orbits With Energy levels And secondly he could Then equate energy.

The Antidote to Angels and Demons. Antimatter is real saves lives origins of the universe Huge mystery.

Nuclear Chemistry/Physics And you 1. Radiation What exactly is this radiation stuff you hear about? Radiation is the release of Energy (and matter) that.

If the sun is a burning ball of gas … just what gas is it burning? Warmup Question:

Jim Sullivan.  Big Bang Theory  Dark Matter and Dark Energy  Detecting Dark Matter  Radiation and Pulse Shape Discrimination  SNOLAB  Summary.

Pair Production and photon-matter interactions Contents: Photoelectric effect Compton scattering Absorption Pair production Whiteboards.

Types of Radiation 10/1/15. Brain Teaser Soft and fragile is my skin I get my growth in mud I’m dangerous on something pretty If you’re not careful, I.

Electrons in Atoms Chapter 4.

Atomic Structure Figure 6.27.

The Standard Model of Particle Physics

Topic: Nuclear Chemistry

Modern Physics.

Lesson 1: The Nature of Electromagnetic Waves

A –Level Physics: Nuclear Physics Particle Classification

Scattering of light Physics /15/2018 Lecture XI.

Photoelectric Effect.

Quantum nature of light (photons)

Last week: Temperature

The Beginning of Time (Birth Of The Universe)

Nuclear Fusion.

Positron Emission, Gamma, and Electron Capture

How Does the Sun Get Its Energy?

Radioactive Decay.

Quiz Time! What are we made of? Where does that stuff come from?

Arak صفحه اول, شامل عنوان گزارش به فارسی و انگلیسی, نام تهیه کننده و تاریخ ارایه.

Pair Production and photon-matter interactions

ATOMIC STRUCTURE Unit 1 – Lessons 1 & 2.

Quantization of light, charge and energy Chapter 2-Class5

Technician’s Notes Activity 10S Software Based 'Bubble chamber photographs'

Atomic Structure.

A step by step guide to The Big Bang.

What is Light?.

Mr. Thompkins in Wonderland

Antimatter By Thomas Powell.

Presentation transcript:

Antimatter And Annihilation

Remember Photons? What are photons?

What can Photons do? When photons come close to an atom, they can do a few things: 1) NOTHING- it just sails by and doesn’t hit anything

What can Photons do? When photons come close to an atom, they can do a few things: 2) It can hit an electron and make it go up a level…

What can Photons do? When photons come close to an atom, they can do a few things: 3) It can knock an electron loose (Remember the photoelectric effect?)

What can Photons do? When photons come close to an atom, they can do a few things: 4) If it had A LOT of energy, it can spontaneously turn into matter! Poof! e- e+ BIG PHOTON

What can Photons do? But not just anything….. The huge photon can spontaneously create an electron and a positron. Poof! e- e+ BIG PHOTON electron positron

MATTER What can Photons do? Electrons are regular electrons. Positrons are special particles that are called ANTIMATTER! (Like the Red Matter in the Star Trek Movie)

Positrons Positrons are created very rarely and don’t live very long. They are exactly like an electron BUT, they have a positive charge! (They even have the same mass as an electron)

Positrons So… ElectronsPositrons Mass 9.11E-31kg 9.11E-31kg Charge Neg (-)Pos (+) MatterAntimatter e-e+

Einstein’s Equation So how much energy does the photon need to be in order to create these two particles? Einstein figured it out…

Einstein’s Equation Energy Needed Total mass created Speed of light squared

Example What is the minimum energy needed for a photon to create an electron-positron pair? Recall the mass of both particles is 9.11E-31kg.

Example What is the minimum energy needed for a photon to create an electron-positron pair? Recall the mass of both particles is 9.11E-31kg. m electron =9.11E-31kg m positron =9.11E-31kg

Example What is the minimum energy needed for a photon to create an electron-positron pair? Recall the mass of both particles is 9.11E-31kg. m electron =9.11E-31kg m positron =9.11E-31kg

Antimatter So when you get a lot of high energy photons, you have a chance of creating some matter and antimatter both at the same time. HOWEVER…. If antimatter runs into regular matter after its’ created, something else happens….

Antimatter Matter Antimatter

Matter Antimatter

Matter Antimatter

Matter Antimatter

KABOOM!! BIG EXPLOSION: All the energy that was needed to create the particles in the first place is released all over again. This KABOOM is called Annihilation.

Example How much energy is released when.005kg of dirt annihilates with.005kg of anti-dirt. Anti- dirt is just dirt made up of antimatter particles.

Example How much energy is released when.005kg of dirt annihilates with.005kg of anti-dirt. Anti- dirt is just dirt made up of antimatter particles. m total =.005kg+.005kg=.010kg

Example How much energy is released when.005kg of dirt annihilates with.005kg of anti-dirt. Anti- dirt is just dirt made up of antimatter particles. m total =.005kg+.005kg=.010kg

Practice Complete the worksheet on antimatter creation and annihilation.