Biogenic Sulfur Gases as Biosignatures on Temperate Sub-Neptune Waterworlds
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Half life
1. 7.2 â half life
daughter isotope | decay curve | half life | parent isotope |
radiocarbon dating
2. half life and radiocarbon dating
⢠half life - amount of time it takes for an isotope to become half of its value
⢠radiocarbon dating - measuring the age of an object by the amount of
carbon 14 remaining
⢠A machine called accelerator mass spectrometer is used for radiocarbon
dating
3. decay curves
⢠decay curve - curved
line on a graph that
shows the rate the
radioisotope decays
at
⢠every decay curve
looks the same, only
the half life would
differ depending on
the isotope
Decay curve for mercury-209
4. parent and daughter isotopes
⢠Daughter isotope - stable product of radioactive decay
⢠Parent isotope - the isotope going through radioactive
decay
Common
isotope
pairs
7. fission
⢠Fission - split of bigger nucleus into smaller nuclei |
energy | subatomic particles [ protons | electrons |
neutrons ]
⢠The power released from fission is used to power our
current lifestyles
8. nuclear reactions + equations
⢠Nuclear equation -
equation
demonstrating
radioactive decay [
temperature | density |
pressure ]
⢠Nuclear reaction - a
process a nucleus goes
through when loosing
or gaining particles
energy
Quick guide to
writing nuclear
equations
writing nuclear equations:
-sum of mass stays the same on both sides
-sum of charges stays the same
9. chain reactions
⢠Chain reaction - an event in which one reaction initiates
another
Uranium-
235
chain
reaction
10. CANDU reactor
⢠â canadian deuterium uranium â reactor
⢠one of most safe in the world
⢠produces heat using :
diagram of
CANDU
reactor
11. fusion
⢠Fusion - 2 low
mass nuclei
coming together
to form a bigger
nucleus
- the arc reactor uses fusion to power itself
- arc reactor supposedly relies on a Pd-103/Pd-107 radio-
isotopic decay cell to produce electrical current
the
sunâs
fusion
process
12. video explaining how the arc reactor works:
⢠https://www.youtube.com/watch?v=h_i5pmy
Vxb8
Cool article:
⢠http://www.huffingtonpost.com/quora/what-
is-the-theoryconcept_b_3456241.html