Tagged Questions
6
votes
2answers
144 views
Radioactive Decay
Problem:Nuclei of a radioactive element $\Bbb X$ having decay constant $\lambda$ , ( decays into another stable nuclei $\Bbb Y$ ) is being produced by some external process at a constant rate ...
1
vote
1answer
56 views
$\require{mhchem}$ $\ce{\beta^{+}}$ decay for $\ce{_9^18F}$, computing $\Delta m$
For the decay:
$$\require{mhchem}\ce{_9^18F\to_8^18O +e+ +{v}}$$
To compute $E$, I need $\Delta m$, the provided answer looks like:
$$m_i = 18.000938~u$$
$$m_f = 17.999159~u + 2~(5.49 \times ...
1
vote
1answer
44 views
Conversion of energy to mass with radioactive decay
Consider the following problem:
The nuclei of Am-241 decay by the emission of $\alpha$-particles with a kinetic speed of $8.8 \cdot 10^{-19} J$. In a certain source of Am-241 there are $ 4.0 \cdot ...
0
votes
1answer
63 views
What is the momentum of these emitted photons?
5 x 10^7 kg of radioactive material emits energy in the form of photons of red light (700 nm). (Note: photons have no mass.)
What is the momentum of each photon?
...
0
votes
2answers
136 views
Energy Question
Carl throws 100 g of Bohrium-262 (Half life: 0.10 seconds, undergoes alpha decay) to Sukhdeep with a initial horizontal velocity of 20.0 m/s at an initial height of 2.00 m above the ground. What is ...
0
votes
3answers
114 views
How can radioactivity change depending on the number of nuclei? [closed]
I came across this problem. Please help me solve it.
A radioactive sample S1 having an activity of $5\ \mathrm{\mu Ci}$ has twice the number of nuclei as another sample S2 which has an activity ...
0
votes
0answers
49 views
Problem on nuclear physics radioactivity [duplicate]
Possible Duplicate:
How do we know that C14 decay is exponential and not linear?
Please help me solving this problem.
Find the half life period of uranium-238,if one gram of it emits ...
