Nuclear Decay. Nuclear Symbols Element symbol Mass number, A (p + + n o ) Atomic number, Z (number...

Nuclear Decay

Nuclear Symbols

Element symbol

Mass number, A (p+ + no)

Atomic number, Z(number of p+)

U23592

Balancing Nuclear Equations

nKrBanU 10

23592 3

Areactants = Aproducts

Zreactants = Zproducts

235 + 1 = 142 + 91 + 3(1)

92 + 0 = 56 + 36 + 3(0)

Balancing Nuclear Equations #2

4222688Ra

226 = 4 + ____222

88 = 2 + ___86

Atomic number 86 is radon, Rn

Balancing Nuclear Equations #3

nInU 10

23592 2

235 + 1 = 139 + 2(1) + ____95

3992 + 0 = 53 + 2(0) + ____

Atomic number 39 is yttrium, Y

Alpha Decay

Alpha production (a):

an alpha particle is a

helium nucleus ThHeU 23490

Alpha decay is limited to heavy, radioactive

nuclei

ThU 23490

242 orHe

Alpha Radiation

Limited to VERY large nucleii.

Beta Decay

Beta production (b):A beta particle is an electron ejected from the nucleus

ePaTh 01

Beta emission converts a neutron to a proton

0123491

23490 PaTh

0101 ore

Beta Radiatio

Converts a neutron into a proton.

Gamma Ray Production

Gamma ray production (g):

Gamma rays are high energy photons produced in association with other forms of decay.

Gamma rays are massless and do not, by themselves, change the nucleus

0023490

23892 2 ThHeU

Gamma Ray Production

Gamma ray production (g):

Gamma rays are high energy photons produced in association with other forms of decay.Gamma rays are massless and do not, by themselves, change the nucleus

0023490

23892 2 ThHeU

Positron Production

Positron emission:Positrons are the anti-particle of the electron

Positron emission converts a proton to a neutron

NeeNa 2210

Electron Capture

Electron capture: (inner-orbital electron is captured by the nucleus)

Electron capture converts a proton to a neutron

0020179

20180 AueHg

Types of Radiation

NuclearStability

Decay will occur in such a way as to return a nucleus to the band (line) of stability.The most stable nuclide is Iron-56

If Z > 83, the nuclide is radioactive

Graphic – Wikimedia user : Napy1kenobi

A Decay Series

A radioactive nucleus reaches a stable state by a series of steps

Graphic – Wikimedia Commons User Tosaka

Half-life

Graphic - http://cafreetextbooks.ck12.org/science/CK12_Earth_Science_rev.pdf

Decay Kinetics

Decay occurs by first order kinetics (the rate of decay is proportional to the number of nuclides present)

lnN = number of nuclides remaining at time t

N0 = number of nuclides present initially

k = rate constant

t = elapsed time

Calculating Half-life

693.0)2ln(2/1

t1/2 = Half-life (units dependent on rate constant, k)

Sample Half-Lives

Nuclear Decay. Nuclear Symbols Element symbol Mass number, A (p + + n o ) Atomic number, Z (number...

Documents

Nuclear Reactions. Nuclear Symbols Element symbol Mass number (p + + n o ) Atomic number (number of p + )

Chapter 18 NuClear Chemistry · 718 Chapter 18 Nuclear Chemistry + + + + Energy p + p + n + n 24 He2+ For many of the lighter elements, the possession of an equal number of protons

Introduction to Nuclear Physics and Nuclear Decay · 2008. 5. 28. · 22 May 2008 4 Elements Named for their number of protons Z (atomic number) = number of protons in nucleus N =

1 Nuclear Magnetic Resonance (NMR) Spectroscopy. Nuclear Spin A nucleus with an odd atomic number or an odd mass number has a nuclear spin. Nuclei of

NUCLEAR POWERPLANT SHUTDOWNS- WHO PAYS? Congress/Nuclear Powerplant... · NUCLEAR POWERPLANT SHUTDOWNS-WHO PAYS? HEARING ... Mark P., consumer advocate ... related shutdowns at nuclear

PE NUMBER: 0604222F UNCLASSIFIED - GlobalSecurity.org · PE NUMBER: 0604222F UNCLASSIFIED PE TITLE: ... provide support on the nuclear hardness database; ... support the nuclear aircraft

Solar Energy - P.5 Biogas – P.10 Nuclear Power – P.15

Nuclear Decay Graphic: . Nuclear Symbols Element symbol Mass number, A (p + + n o ) Atomic number, Z (number of p + )

photon.physnet.uni-hamburg.dephoton.physnet.uni-hamburg.de/.../Skript-AO-pages-10a-28a.pdf · Table 3.1 The proton number Z, the neutron number N, the nuclear spiñ*. I, the nuclear

Nuclear Weapons & Nuclear Warfare - University of Notre Dame › ~nsl › Lectures › nuclear_warfare › 2012 › ...Fact Sheet 28,800: The total number of intact nuclear warheads

Tokyo’s Nuclear Option · Thinking About the Unthinkable: Tokyo’s Nuclear Option 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER

THE NUCLEUS AND NUCLEAR REACTIONS. Nuclear descriptions Atomic number Atomic mass number Isotopes nucleons

Date Entered: Jan 22, 2003 - Nuclear Regulatory Commissiondate entered: jan 22, 2003 to: us nuclear regulato c mission dshood opy number. 12 transmital number: 234085 procedure number:

Nuclear Symbols Element symbol Mass number (p + + n o ) Atomic number (number of p + )

Analysis Status of „Modification of the p p interaction in nuclear matter“

Nuclear Physics What is going on in there?. Nuclear structure A – atomic mass number Z – atomic number (number of protons) N – number of neutrons (N =

Nuclear Reactions. Balancing Nuclear Equations Conservation of: Conservation of: Atomic Number (subscript) Atomic Mass (superscript)

Nuclear Chemistry Reactions and properties of nucleus M p n Mass number (number of nucleons) nuclide : nuclear species Isotopes : nuclides of same chemical

1 NUCLEAR CHEMISTRY. 2 Isotopes Same element (Z) but different mass number (A).Same element (Z) but different mass number (A). Boron-10 has 5 p and 5

Item Number P-21 Item Number P-9 Item Number P-7 Item ... · CONSERVATION POSTERS Created by MCPS Students and Staff Available From SERT via Maximo Item Number P-42 Item Number P-41