Food Monitoring for the US  How low should we go - FDA limit for US  Bye-Bye Becquerels Is there radiation in the food? Ami is 10 and lives in Yanaizu,

Slides:

Advertisements

Similar presentations

Radioactivity. Radioactivity – Particles are emitted from an unstable nuclei. positron High Energy Photons gamma β-β- Beta αAlpha symbolName β+β+

Advertisements

In a few instances, gamma rays are the only form of radiation coming from a radioactive material. This can happen when a nucleus which is energized.

What nuclides made that electromagnetic radiation? How nuclear scientists identify nuclides in a sample.

Unstable Nuclei and Radioactive Decay

Do Now (3/17/14): What are some words and images that come to mind when you hear the word “radioactivity”? What is an isotope? What makes an isotope.

Half-Life Noadswood Science, 2012.

Section 4.4 Unstable Nuclei and Radioactive Decay

Radiation Detector 3 Gold Leaf electroscope Geiger Muller Tube.

Nuclear Energy Radioactivity and Half-Life FissionFusion.

Nuclear Physics Selected Topics 2  Radioactivity.

1 Chapter 9 Nuclear Radiation 9.1 Natural Radioactivity.

Alpha, Beta, and Gamma Decay

Section 4: Unstable Nuclei and Radioactive Decay

Section 2: Nuclear Energy

Radiological Monitoring of Air and Drinking Water in British Columbia Following the Fukushima Nuclear Incident Environmental Health Services (EHS) British.

Nuclear Energy More Bang for your Buck?. Is it Green?

Radioactivity Some substances spontaneously emit radiation – radioactivity The rays and particles emitted are called “radiation”. Radioactive elements.

Nuclear Chemistry In this chapter, we will discuss concepts that contradict what you have already learned. In a nuclear reaction, elements can change.

Alpha Decay parent nucleus daughter nucleus Atomic number: -2 mass number: -4.

Nuclear Chemistry Radioactivity Antoine Henri Becquerel ( ) Discovered radioactivity accidentally while experimenting with photographic film.

B: Radioactive Decay. There are about 350 isotopes of 90 elements found in our solar system. Of these, about 70 are radioactive. Naturally occurring radioisotopes.

Chemistry Chapter 4 Notes #3 (Sec 4). Unstable Nuclei Nuclear Reactions Nuclear Reactions –Rxns that involve a change in the nucleus of an atom (most.

Ch Nuclear Chemistry. Discovery of Radioactivity Radioactivity was first observed in ______by.

Radioactivity Prepared by: Timothy John D. Matoy.

AP Chemistry Podcast 1.3 Nuclear Chemistry. 2 Nuclear Chemistry Nuclear reactions involve changes that originate in the nucleus of the atom. Chemical.

Chapter 9 Nuclear Chemistry. What is nuclear chemistry? Nuclear chemistry is all about what happens in the nucleus of an atom. In nuclear chemistry, neutrons.

Isotopic Abundance Reminder: bring a calculator to class.

Discovery of Radioactivity

1 Chapter 9 Nuclear Radiation 9.1 Natural Radioactivity Copyright © 2009 by Pearson Education, Inc.

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Chapter 9 Nuclear.

1 Nuclear Chemistry 2 Radioactivity One of the pieces of evidence for the fact that atoms are made of smaller particles came from the work of ( ).One.

Isotopes & Radioactive Decay

Gamma Decay. Radioactive Decay Alpha Decay Radioactive Decay Alpha Decay Beta Decay.

Radioactive Decay.

10.1 Radioactivity. Nuclear Decay… Atoms of one element can change into atoms of a different element altogether. An unstable atom has excess internal.

Radioactive Decay.

Radioactive Decay By: Nathaniel Hunt.

Nuclear Reactions. Going Nuclear A nuclear reaction is a reaction in which there are changes to the nuclei of the atoms involved. This differs from previous.

Atom’s Nucleus and Radioactivity 08 October 2015 Background Background Radioactivity and natural background exposure Radioactivity and natural background.

P2 7.1 Nuclear reactions Some atoms have an unstable nucleus and need to get to a lower energy state. It can become stable by emitting Alpha, Beta or.

Radiation Foldable Setup. Your Name radiation radioactive irradiated decay half life contamination.

Whatis Nuclear Fission? More neutrons trigger more fissions and so the energy release is multiplied enormously. A subatomic projectile called a neutron.

7.1 Part 1: Radioactivity & Isotopes. Radiation High energy rays and particles emitted by radioactive sources. (most invisible to human eyes) Includes:

Chapter 4 Nuclear Radiation Background image source:

PHYSICS – Radioactive Decay

Integrated Science Mr. Danckers Chapter 10.

John Preston Structure of the Atom p np n Nucleus.

Energy Nuclear Fusion, Nuclear Fission, Combustion and Solar Radiation.

Integrated Science C Mrs. Brostrom. Describe the availability, current uses and environmental issues related to the use of fossil and nuclear fuels to.

Unstable Nuclei and Radioactive Decay Radioactivity – spontaneous emission of radiation Radiation – rays and particles emitted from a radioactive material.

CLICK HERE TO BEGIN! Directions: Click the term that correctly matches the definition in each question.

August 2005 EMS & Trauma Systems Section Office of Public Health Preparedness RADIOLOGICAL NUCLEAR EXPLOSIVE.

Unstable Nuclei and Radioactive Decay. Radioactivity (Radioactive decay) The process by which some substances spontaneously emit radiation. Radioactive.

Nuclear Physics An Introduction. What does it mean when something is “Radioactive”? Atomic nuclei that emit particles and energy are said to be radioactive.

Nuclear Chemistry I.Half-Life II.Fission vs. Fusion.

CP6 – RADIOACTIVITY (p ) Nuclear Equations e.g Each line of numbers has to balance on both sides of the equation. For example 238 

Nuclear Reactions.

Chapter 9 Nuclear Radiation

Nuclear Reactions.

These particles make up

I. Nuclear Equations Mass numbers and atomic numbers are conserved in nuclear equations.

Nuclear Chemistry Notes#6

Chapter 9 Nuclear Radiation

Ionising Radiation.

Ionising Radiation.

Radioactivity radiation.

Unit 4 – Nuclear Reactions

Unit 4 – Nuclear Reactions

Nuclear Chemistry Vocabulary.

Presentation transcript:

Food Monitoring for the US  How low should we go - FDA limit for US  Bye-Bye Becquerels Is there radiation in the food? Ami is 10 and lives in Yanaizu, Fukushima prefecture.  Technical Talk  We are already contaminated  Who’s testing food  What they are finding

The  ’s of radioactivity Different types of radiation (  ) are blocked by different substances Radioactivity is measured in Becquerels where 1 Bq = 1 atomic disintegration per second

Technical Difficulties “It was beautiful to look upon, so that any one who should see it must long for it, but whoever ate even a little bit of it must die.” Strontium 90 emits a beta particle Plutonium 239 emits an alpha particle Cesium 137 emits a gamma ray*

ATOMIC BOMB blasts worldwide: Contamination Sources 954 quadrillion Bq cesium 137 (that’s 15 zeros)

ROUTINE RELEASES US ???? Cesium 134 & 137

CHERNOBYL 85 quadrillion Bq cesium 137

500 quadrillion Bq noble gas (unspecified, to air) Since April 2012, 10 million Bq cesium-134 & 137 are still released every hour FUKUSHIMA cesium 134 & quadrillion Bq (air and ocean)

US: Who’s Testing?

What they found (so far) 9-11 Bq/kg Cs 134 & & Cs ,500 Bq/kg I Bq/kg Cs 134 & Cs Bq/kg to 2300 Bq/kg Cs 14 Bq/kg Cs 134 & Cs 137 1,038 Bq/kg Cs

How low should you go?

Making contaminated food acceptable International Commission on Radiological Protection (ICRP) 111 “placing contaminated food on the market” “ negative reactions from consumers outside the contaminated areas “

Bye-Bye Becquerels -Silence Deafening: -Beyond Nuclear: -FFAN coalition includes mothers who evacuated from Japan to escape radioactive contamination and were horrified to learn the US recommendations are worse -5Bq/kg binding rather than just recommendations -Widespread testing: foodstuffs, etc.