We don't know when a nucleus will decay. Then how can find its half life?
3958
How does a half-life work?
150813
Why does a photon colliding with an atomic nucleus cause pair production?
126955
How do we see? Where do the photons disappear?
33476
How can beta plus decay be possible?
64088
What does particles with asterisk superscript * mean, such as $Z^*$ or $W^*$, in decay production?
68649
Can nuclear transmutation be observed in real time?
1363
What stabilizes neutrons against beta decay in a neutron star?
60969
What is in the space between a nucleus of an atom and its electrons?
65831
Understanding type of force interaction in particle decays
141632
Is the Higgs boson an elementary particle? If so, why does it decay?
149215
Does a particle annihilate only with its antiparticle? If yes, why?
13959
Protons' repulsion within a nucleus
13683
How is $J^{PC}$ value experimentally determined for new types of particles?
5848
How come neutrons in a nucleus don't decay?
87284
What enables protons to give new properties to an atom every time one is added?
46074
How to find hydrogen wave-functions?
96823
How do we know a quantum state isn't just an unknown classical state?