Just because we can say something is halved in a certain time doesn't necessarily mean that the concept of «half life» is valid over a full range of parameters as it would with, say,
with radioactive decay.
No known process can explain how they could mess around
with radioactive decay rates.
Not exact matches
Hence, we have evolved
with a requirement for
radioactive decay.
A recent analysis of chondrites by Carnegie's Myriam Telus was concerned
with iron - 60, a short - lived
radioactive isotope that
decays into nickel - 60.
But also new elements are created in the hot ejecta of the explosion, among them
radioactive species such as 44Ti (titanium
with 22 protons and 22 neutrons in its atomic nuclei) and 56Ni (28/28 neutrons / protons), which
decay to stable calcium and iron, respectively.
KATRIN will study neutrinos, which are less than a millionth the mass of an electron, by sifting through the aftermath of
radioactive decays of tritium, an isotope of hydrogen
with two neutrons.
Also that day, Fischbach recalls, «when we looked at our data there was a sharp drop in the count rate [the rate of
radioactive decay], exactly coincident
with the flare.»
The Carnegie team focused on a rare isotope of titanium, titanium - 49, because this isotope is the product of
radioactive decay of vanadium - 49 which is produced during supernova explosions and transmutes into titanium - 49
with a half - life of 330 days.
Like mainstream reactors, it is a «light water» design: The reactor is pressurized and filled
with plain water that flows past the core, where the
radioactive decay of uranium - 235 generates intense heat.
What makes the pp reaction hard is that the neutrinos have very low energy that is about the same as the energy of various
radioactive decays that happen on Earth, making it easy for an earthbound detector to confuse a
decay with a neutrino event.
«Even if our formation wasn't triggered by a supernova, the presence of
decay products of certain
radioactive elements points to a supernova perhaps seeding the already formed young solar system
with enriched elements.»
When the core ignites, carbon and oxygen fuse to form lots of
radioactive cobalt - 56, whose
radioactive decay into iron - 56
with a half - life of 77 days powers the peak brightness of a supernova.
To illustrate this effect, Schrödinger imagined putting a cat in a box along
with a device that would release poison to kill it, depending on the random
decay of a
radioactive atom.
Produced by the
decay of
radioactive elements, these particles rarely, if ever, interact
with matter, making them extremely hard to detect and study.
Such tests are often performed by injecting a small amount of
radioactive material into the blood and tracking its path
with cameras that detect
radioactive decay.
G. Brent Dalrymple's classic debunking of the young - earth «scientific» creationism's dating methods
with a short explanation of how geologists know the age Radiometric dating measures the
decay of
radioactive atoms to determine the age of a rock sample.
For first order
decays (think simple
radioactive decay) where the rate constant k does not change over time the rate of change of x
with respect to time, dx / dt, in other words how fast it
decays,
And Earth's core is hot, because of primordial heat from formation,
radioactive decay of Earth core, Lunar tidal forces, AND the varying tidal force of the Sun which happens
with Earth's periodic varying eccentricity.
Place a moon - like solid object (no or infinitesimal amounts of liquids and gases)
with a small internal
radioactive -
decay source of thermal energy in space isolated from all other matter.
Ideally,
radioactive decay produces the best source, but not everyone is equipped to hook up such hot stuff, which is why random.org contents itself
with static, as it were.