Accelerator Physics, JU, First Semester, (Saed Dababneh).

Slides:

Advertisements

Similar presentations

The 26g Al(p, ) 27 Si Reaction at DRAGON Heather Crawford Simon Fraser University TRIUMF Student Symposium July 27, 2005.

Advertisements

I0 I Probability Neutron Attenuation (revisited) X Recall t = N t

Nuclear Reactor Theory, JU, Second Semester, (Saed Dababneh). 1 Course web or

Nuclear Reactor Theory, JU, First Semester, (Saed Dababneh). 1 1/ v 235 U thermal cross sections fission 584 b. scattering 9 b. radiative capture.

Neutron-induced Reactions

Nuclear and Radiation Physics, BAU, 1 st Semester, (Saed Dababneh). 1 Nuclear Mass Unified atomic mass unit u based on 12 C. Replaced both physical.

Nuclear Fission 235U + n  93Rb + 141Cs + 2n Not unique.

I0 I Probability Neutron Attenuation X Recall t = N t

? Nuclear Reactions Categorization of Nuclear Reactions

Accelerator Physics, JU, First Semester, (Saed Dababneh).

Nuclear Physics, JU, Second Semester, (Saed Dababneh). 1 Nuclear Size Alpha particle (+2e) Gold nucleus (+79e) d Quite old!!!

Nuclear Reactor Theory, JU, Second Semester, (Saed Dababneh). 1 1/ v 235 U thermal cross sections fission 584 b. scattering 9 b. radiative capture.

Nuclear Size Quite old!!! Not exactly for Au!!!

Neutron Excess Asymmetry Remember HWc 1.

Nuclear Binding Energy

Basic Nuclear Properties

Silicon detectors in HEP

X-rays : Their Production Their Interaction with Matter

Department of Physics University of Oslo

Introduction to Ionizing Radiation

Short-range, high-LET recoil tracks in CR-39 plastic nuclear track detector E. R. Benton 1, C. E. Johnson 1, J. DeWitt 1, N. Yasuda 2, and E. V. Benton.

Radiopharmaceutical Production

Ion beam Analysis Joele Mira from UWC and iThemba LABS Tinyiko Maluleke from US Supervisor: Dr. Alexander Kobzev Dr. Alexander Kobzev.

Ion Beam Analysis techniques:

Rutherford Backscattering Spectrometry

10-1 CHEM 312 Lecture 10: Part 1 Radiation Reactions: Dosimetry and Hot Atom Chemistry Readings: §Reading: Modern Nuclear Chemistry, Chap. 17; Nuclear.

Neutral Particles. Neutrons Neutrons are like neutral protons. –Mass is 1% larger –Interacts strongly Neutral charge complicates detection Neutron lifetime.

Rutherford Backscattering Spectrometry

Particle Interactions

Nuclear and Radiation Physics, BAU, 1 st Semester, (Saed Dababneh). 1 Nuclear Reactions Categorization of Nuclear Reactions According to: bombarding.

Radiation therapy is based on the exposure of malign tumor cells to significant but well localized doses of radiation to destroy the tumor cells. The.

Stopping Power The linear stopping power S for charged particles in a given absorber is simply defined as the differential energy loss for that particle.

Radiation Detection and Measurement, JU, 1st Semester, (Saed Dababneh). 1 Radiation Sources Heavy nuclei are unstable against spontaneous emission.

Centre de Toulouse Radiation interaction with matter 1.

Radiation Detection and Measurement, JU, First Semester, (Saed Dababneh). 1 Spectrum if all energy is captured in detector. Allows identification.

Department of Physics University of Oslo

Nuclear and Radiation Physics, BAU, First Semester, (Saed Dababneh). 1 Nuclear Reactions Sample.

FRANK LABORTORY OF NEUTRON PHYSICS ION BEAM ANALYSIS

abrasion ablation  σ f [cm 2 ] for projectile fragmentation + fission  luminosity [atoms cm -2 s -1 ]  70% transmission SIS – FRS  ε trans transmission.

Neutrons (Basic Concepts).  It is desirable to classify neutrons according to their kinetic energy into:

Accelerator Physics, JU, First Semester, (Saed Dababneh). 1 Principles of Spectrometry.

Artificial Radioactivity

2. RUTHERFORD BACKSCATTERING SPECTROMETRY Basic Principles.

Alpha and Beta Interactions

1 dE/dx  Let’s next turn our attention to how charged particles lose energy in matter  To start with we’ll consider only heavy charged particles like.

© Jimoid.com 2005 Ionising Radiation There are two types of radiation; ionising and non-ionising. Radiation Ionising Non-ionising Indirectly ionising (neutral.

1 Interaction Between Ionizing Radiation And Matter, Part 3 Neutrons Audun Sanderud Department of Physics University of Oslo.

Daniela Adriana LĂCĂTUŞ1 Supervisor: Alexander Pavlovich KOBZEV

Accelerator Physics, JU, First Semester, (Saed Dababneh). 1 Electron pick-up. ~1/E What about fission fragments????? Bragg curve stochastic energy.

Chapter 5 Interactions of Ionizing Radiation. Ionization The process by which a neutral atom acquires a positive or a negative charge Directly ionizing.

Nuclear and Radiation Physics, BAU, 1 st Semester, (Saed Dababneh) Nuclear and Radiation Physics Why nuclear physics? Why radiation.

Accelerator Physics, JU, First Semester, (Saed Dababneh). 1 In the figure: Photoelectric suppressed. Single Compton (effect of crystal dimensions).

Particle Detectors for Colliders Robert S. Orr University of Toronto.

Basics of Ion Beam Analysis

Nuclear Reactors, BAU, 1st Semester, (Saed Dababneh). 1 Neutron Attenuation (revisited) Recall  t = N  t Probability per unit path length.

Collective model Vibrational States Average shape Instantaneous shape

1 Cost Room Availability Passive Shielding Detector spheres for accelerators Radiation Detection and Measurement, JU, First Semester, (Saed Dababneh).

Rutherford Backscattering Spectrometry (RBS)

Nuclear and Radiation Physics, BAU, First Semester, (Saed Dababneh). 1.

Interaction Ionizing Radiation with Matter BNEN Intro William D’haeseleer BNEN - Nuclear Energy Intro W. D'haeseleer

INTERACTIONS OF RADIATION WITH MATTER. twCshttp:// twCs

Radiation Protection and Safety 3/12/ Interactions with Electrons   Energy-loss Mechanisms Electrons and positrons have similar stopping powers.

Chapter 2 Radiation Interactions with Matter East China Institute of Technology School of Nuclear Engineering and Technology LIU Yi-Bao Wang Ling.

PHYS 3446 – Lecture #13 Energy Deposition in Media

Chapter 5 Interactions of Ionizing Radiation

Resonance Reactions HW 34 In the 19F(p,) reaction:

PHL424: Rutherford scattering discovery of nucleus

Nuclear Size Depends on probe and relevant physics.

PHYS 3446 – Lecture #14 Wednesday,March 7, 2012 Dr. Brandt

PHYS 3446 – Lecture #13 Energy Deposition in Media

Presentation transcript:

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering Elastic or inelastic. Elastic  Rutherford scattering. At any distance: V = 0 Ta = ½mvo2 l = mvob vmin vo rmin b d Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). No dependence on 

Coulomb Scattering Closest approach “d”. E = ECoulomb  d = 2kZe2/E What about the recoil nucleus? HW 9 Show that where mN : mass of the nucleus m : mass of alpha What are the values of d for 10, 20, 30 and 40 MeV  on Au? How does this explain … ? Nuclear and Radiation Physics, BAU, Second Semester, 2009-2010 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering b   < b  >  db  d n  target nuclei / cm3 x  target thickness (thin). nx  target nuclei / cm2 HW 10 Show that and hence b Rutherford cross section Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering Study Fig. 11.10 (a,b,c,d) in Krane See also Fig. 11.11 in Krane. HW 11 Show that the fraction of incident alpha particles scattered at backward angles from a 2 m gold foil is 7.48x10-5. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering RBS – Channeling. Ion implantation. Occupational or substitutional impurities. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering Elastic  Rutherford scattering. Inelastic  Coulomb excitation. See the corresponding alpha spectrum of Fig. 11.12 in Krane. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Coulomb Scattering Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Principles of Spectrometry Interaction of heavy charged particles Electronic or nuclear (Rutherford, nuclear reactions, …) or radiative (Bremsstrahlung). ? Al in Al Excitation Ionization ion-pair, suppress recombination in detectors. Energy loss SRIM http://www.srim.org Depletion layer. Delta rays and secondary electrons. Electron suppression for charge integration in accelerators. Faraday Cup. Tracks. Detectors mainly designed to make use of electronic interactions. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Principles of Spectrometry Stopping power Bethe-Bloch formula ~1/E ~1/E Minimum ionizing particles (mip). Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Principles of Spectrometry Units (conversion) You will encounter this when you run SRIM eV / Å keV / m MeV / mm keV / (g/cm2) MeV / (mg/cm2) keV / (mg/cm2) eV / (1x1015 atoms/cm2) Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Principles of Spectrometry What about fission fragments????? Energy loss is a stochastic process, thus energy straggling. Accelerated beam ~1/E Electron pick-up. Target Bragg curve Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh). Hadrontherapy Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).