1. Home
  2. College physics
  3. College physics
  4. Selected radioactive isotopes

0.2 Selected radioactive isotopes

<< Chapter < Page
  College physics   Page 1 / 1
Chapter >> Page >

Decay modes are α size 12{α} {} , β − size 12{β rSup { size 8{ - {}} } } {} , β + size 12{β rSup { size 8{+{}} } } {} , electron capture (EC) and isomeric transition (IT). EC results in the same daughter nucleus as would β + size 12{β rSup { size 8{+{}} } } {} decay. IT is a transition from a metastable excited state. Energies for β ± size 12{β rSup { size 8{ +- {}} } } {} decays are the maxima; average energies are roughly one-half the maxima.

Selected radioactive isotopes
Isotope t 1/2 DecayMode(s) Energy(MeV) Percent γ size 12{γ} {} -Ray Energy(MeV) Percent
3 H size 12{rSup { size 8{ 3 {}} }H} {} 12.33 y β − size 12{β rSup { size 8{ - {}} } } {} ­ 0.0186 100%
14 C size 12{rSup { size 8{ 6 {}} }Li} {} 5730 y β − size 12{β rSup { size 8{ - {}} } } {} 0.156 100%
13 N size 12{rSup { size 8{ 13 {}} }N} {} 9.96 min β + size 12{β rSup { size 8{+{}} } } {} 1.20 100%
22 Na size 12{rSup { size 8{ 6 {}} }Li} {} 2.602 y β + size 12{β rSup { size 8{+{}} } } {} 0.55 90% γ size 12{γ} {} 1.27 100%
32 P size 12{rSup { size 8{ 32 {}} }P} {} 14.28 d β − size 12{β rSup { size 8{ - {}} } } {} 1.71 100%
35 S size 12{rSup { size 8{ 35 {}} }S} {} 87.4 d β − size 12{β rSup { size 8{ - {}} } } {} ­ 0.167 100%
36 Cl size 12{rSup { size 8{ 36 {}} }Cl} {} 3 . 00 × 10 5 y size 12{3 "." "00" times "10" rSup { size 8{5} } y} {} β − size 12{β rSup { size 8{ - {}} } } {} 0.710 100%
40 K size 12{rSup { size 8{ 40 {}} }K} {} 1 . 28 × 10 9 y size 12{1 "." "28" times "10" rSup { size 8{9} } y} {} β − size 12{β rSup { size 8{ - {}} } } {} 1.31 89%
43 K size 12{rSup { size 8{ 43 {}} }K} {} 22.3 h β − size 12{β rSup { size 8{ - {}} } } {} 0.827 87% γ s size 12{γs} {} 0.373 87%
0.618 87%
45 Ca size 12{rSup { size 8{ 6 {}} }Li} {} 165 d β − size 12{β rSup { size 8{ - {}} } } {} ­ 0.257 100%
51 Cr size 12{rSup { size 8{ 51 {}} }Cr} {} 27.70 d EC γ size 12{γ} {} 0.320 10%
52 Mn size 12{rSup { size 8{ 52 {}} }Mn} {} 5.59d β + size 12{β rSup { size 8{+{}} } } {} 3.69 28% γ s size 12{γs} {} 1.33 28%
1.43 28%
52 Fe size 12{rSup { size 8{ 52 {}} }Fe} {} 8.27 h β + size 12{β rSup { size 8{+{}} } } {} 1.80 43% 0.169 43%
0.378 43%
59 Fe size 12{rSup { size 8{ 59 {}} }Fe} {} 44.6 d β − s size 12{β rSup { size 8{ - {}} } s} {} 0.273 45% γ s size 12{γs} {} 1.10 57%
0.466 55% 1.29 43%
60 Co size 12{rSup { size 8{ 60 {}} }Co} {} 5.271 y β − size 12{β rSup { size 8{ - {}} } } {} ­ 0.318 100% γ s size 12{γs} {} 1.17 100%
1.33 100%
65 Zn size 12{rSup { size 8{ 65 {}} }Zn} {} 244.1 d EC γ size 12{γ} {} 1.12 51%
67 Ga size 12{rSup { size 8{ 67 {}} }Ga} {} 78.3 h EC γ s size 12{γs} {} 0.0933 70%
0.185 35%
0.300 19%
others
75 Se size 12{rSup { size 8{ 75 {}} }Se} {} 118.5 d EC γ s size 12{γs} {} 0.121 20%
0.136 65%
0.265 68%
0.280 20%
others
86 Rb size 12{rSup { size 8{ 86 {}} }Rb} {} 18.8 d β − s size 12{β rSup { size 8{ - {}} } s} {} 0.69 9% γ size 12{γ} {} 1.08 9%
1.77 91%
85 Sr size 12{rSup { size 8{ 85 {}} }Sr} {} 64.8 d EC γ size 12{γ} {} 0.514 100%
90 Sr size 12{rSup { size 8{ 90 {}} }Sr} {} 28.8 y β − size 12{β rSup { size 8{ - {}} } } {} ­ 0.546 100%
90 Y size 12{rSup { size 8{ 90 {}} }Y} {} 64.1 h β − size 12{β rSup { size 8{ - {}} } } {} ­ 2.28 100%
99m Tc size 12{rSup { size 8{ 99m {}} }Tc} {} 6.02 h IT γ size 12{γ} {} 0.142 100%
113m In size 12{rSup { size 8{ 113m {}} }In} {} 99.5 min IT γ size 12{γ} {} 0.392 100%
123 I size 12{rSup { size 8{ 123 {}} }I} {} 13.0 h EC γ size 12{γ} {} 0.159 ≈100% size 12{ approx "100"%} {}
131 I size 12{rSup { size 8{ 131 {}} }I} {} 8.040 d β − s size 12{β rSup { size 8{ - {}} } s} {} 0.248 7% γ s size 12{γs} {} 0.364 85%
0.607 93% others
others
129 Cs size 12{rSup { size 8{ 129 {}} }Cs} {} 32.3 h EC γ s size 12{γs} {} 0.0400 35%
0.372 32%
0.411 25%
others
137 Cs size 12{rSup { size 8{ 137 {}} }Cs} {} 30.17 y β − s size 12{β rSup { size 8{ - {}} } s} {} ­ 0.511 95% γ size 12{γ} {} 0.662 95%
1.17 5%
140 Ba size 12{rSup { size 8{ 140 {}} }Ba} {} 12.79 d β − size 12{β rSup { size 8{ - {}} } } {} 1.035 ≈100% size 12{ approx "100"%} {} γ s size 12{γs} {} 0.030 25%
0.044 65%
0.537 24%
others
198 Au size 12{rSup { size 8{ 198 {}} }Au} {} 2.696 d β − size 12{β rSup { size 8{ - {}} } } {} ­ 1.161 ≈100% size 12{ approx "100"%} {} γ size 12{γ} {} 0.412 ≈100% size 12{ approx "100"%} {}
197 Hg size 12{rSup { size 8{ 197 {}} }Hg} {} 64.1 h EC γ size 12{γ} {} 0.0733 100%
210 Po size 12{rSup { size 8{ 210 {}} }Po} {} 138.38 d α size 12{α} {} 5.41 100%
226 Ra size 12{rSup { size 8{ 226 {}} }Ra} {} 1 . 60 × 10 3 y size 12{1 "." "60" times "10" rSup { size 8{3} } y} {} α s size 12{αs} {} 4.68 5% γ size 12{γ} {} 0.186 100%
4.87 95%
235 U size 12{rSup { size 8{ 6 {}} }Li} {} 7 . 038 × 10 8 y size 12{7 "." "038" times "10" rSup { size 8{8} } y} {} α size 12{α} {} 4.68 ≈100% size 12{ approx "100"%} {} γ s size 12{γs} {} numerous <0.400%
238 U size 12{rSup { size 8{ 6 {}} }Li} {} 4 . 468 × 10 9 y size 12{4 "." "468" times "10" rSup { size 8{9} } y} {} α s size 12{αs} {} 4.22 23% γ size 12{γ} {} 0.050 23%
4.27 77%
237 Np size 12{rSup { size 8{ 237 {}} }Np} {} 2 . 14 × 10 6 y size 12{2 "." "14" times "10" rSup { size 8{6} } y} {} α s size 12{αs} {} numerous γ s size 12{γs} {} numerous <0.250%
4.96 (max.)
239 Pu size 12{rSup { size 8{ 239 {}} }Pu} {} 2 . 41 × 10 4 y size 12{2 "." "41" times "10" rSup { size 8{4} } y} {} α s size 12{αs} {} 5.19 11% γ s size 12{γs} {} 7 . 5 × 10 − 5 size 12{7 "." 5 times "10" rSup { size 8{ - 5} } } {} 73%
5.23 15% 0.013 15%
5.24 73% 0.052 10%
others
243 Am size 12{rSup { size 8{ 243 {}} }Am} {} 7 . 37 × 10 3 y size 12{7 "." "37" times "10" rSup { size 8{3} } y} {} α s size 12{αs} {} Max. 5.44 γ s size 12{γs} {} 0.075
5.37 88% others
5.32 11%
others

Questions & Answers

what is biology
Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
what is biology
Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply
<< Chapter < Page Page > Chapter >>

Read also:

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, College physics. OpenStax CNX. Jul 27, 2015 Download for free at http://legacy.cnx.org/content/col11406/1.9
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'College physics' conversation and receive update notifications?

Ask