HARD
Diploma
IMPORTANT
Earn 100

Use the electromagnetic vertex to draw a Feynman diagram for the scattering of a photon off a positron.

Important Questions on Atomic, Nuclear and Particle Physics

MEDIUM
Diploma
IMPORTANT
How would the decay of a nucleus of Co2760 into a nucleus of Ni2860 be described?
HARD
Diploma
IMPORTANT
The activity of a sample containing a radioactive element is 6400 Bq. After 36 minutes the activity is 800 Bq. What is the halflife of the sample?
EASY
Diploma
IMPORTANT
A sample contains a small quantity of a radioactive element with a very long halflife. The activity is constant and equal to A. The temperature of the sample is increased. What are the effects if any, on the halflife and activity of the sample?
MEDIUM
Diploma
IMPORTANT
What is the common characteristic of most nuclei with mass number greater than about 20?
MEDIUM
Diploma
IMPORTANT
 The binding energy per nucleon for B511 is about 7 MeV. What is the minimum energy needed to separate the nucleons of B511?
HARD
Diploma
IMPORTANT
The reaction p+np+π0 is impossible. Which conservation law would be violated if the reaction occured?
HARD
Diploma
IMPORTANT
What are the charge Q and strangeness S of the baryon Λ=uds?
MEDIUM
Diploma
IMPORTANT

What process does this Feynman diagram represent?

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