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

how to study physic and understand
Ewa Reply
what is conservative force with examples
Moses
what is work
Fredrick Reply
the transfer of energy by a force that causes an object to be displaced; the product of the component of the force in the direction of the displacement and the magnitude of the displacement
AI-Robot
why is it from light to gravity
Esther Reply
difference between model and theory
Esther
Is the ship moving at a constant velocity?
Kamogelo Reply
The full note of modern physics
aluet Reply
introduction to applications of nuclear physics
aluet Reply
the explanation is not in full details
Moses Reply
I need more explanation or all about kinematics
Moses
yes
zephaniah
I need more explanation or all about nuclear physics
aluet
Show that the equal masses particles emarge from collision at right angle by making explicit used of fact that momentum is a vector quantity
Muhammad Reply
yh
Isaac
A wave is described by the function D(x,t)=(1.6cm) sin[(1.2cm^-1(x+6.8cm/st] what are:a.Amplitude b. wavelength c. wave number d. frequency e. period f. velocity of speed.
Majok Reply
what is frontier of physics
Somto Reply
A body is projected upward at an angle 45° 18minutes with the horizontal with an initial speed of 40km per second. In hoe many seconds will the body reach the ground then how far from the point of projection will it strike. At what angle will the horizontal will strike
Gufraan Reply
Suppose hydrogen and oxygen are diffusing through air. A small amount of each is released simultaneously. How much time passes before the hydrogen is 1.00 s ahead of the oxygen? Such differences in arrival times are used as an analytical tool in gas chromatography.
Ezekiel Reply
please explain
Samuel
what's the definition of physics
Mobolaji Reply
what is physics
Nangun Reply
the science concerned with describing the interactions of energy, matter, space, and time; it is especially interested in what fundamental mechanisms underlie every phenomenon
AI-Robot
what is isotopes
Nangun Reply
nuclei having the same Z and different N s
AI-Robot
<< 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