- #1
pavadrin
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Hey
I was studying for an upcoming test on Nuclear Technology, and I am unable to do the calculations for this unit. Ill post 2 of the many problems which I can’t do.
Calculate the binding energy for an atom of Uranium – 235.
My working:
Number of:
Protons – 92
Neutrons – 143
Therefore, mass of protons = [tex]92 \times 1.67265\times 10^-27 = 1.538838\times 10^-25[/tex]kg
Mass of neutrons = [tex]143 \times 1.67496\times 10^-27 = 2.3951928\times 10^-25[/tex]kg
Combined mass of nucleons = [tex]3.93440308\times 10^-25[/tex]kg
From here I do not know where to go.
Under certain circumstances, a gamma ray photon may suddenly change into an electron and positron as in the following equation:
[tex]\gamma \rightarrow e^0_-1 + e^0_+1[/tex]
Calculate the minimum energy of the photon.
This problem has me completely lost, as I don not understand how a gamma ray with no mass can all of a sudden be broken down into the two parts, and electron and a positron which have a mass.
Many thanks for any replies with the slightest help, as I am completely lost on these equations plus similar ones.
Thanks,
Pavadrin
I was studying for an upcoming test on Nuclear Technology, and I am unable to do the calculations for this unit. Ill post 2 of the many problems which I can’t do.
Calculate the binding energy for an atom of Uranium – 235.
My working:
Number of:
Protons – 92
Neutrons – 143
Therefore, mass of protons = [tex]92 \times 1.67265\times 10^-27 = 1.538838\times 10^-25[/tex]kg
Mass of neutrons = [tex]143 \times 1.67496\times 10^-27 = 2.3951928\times 10^-25[/tex]kg
Combined mass of nucleons = [tex]3.93440308\times 10^-25[/tex]kg
From here I do not know where to go.
Under certain circumstances, a gamma ray photon may suddenly change into an electron and positron as in the following equation:
[tex]\gamma \rightarrow e^0_-1 + e^0_+1[/tex]
Calculate the minimum energy of the photon.
This problem has me completely lost, as I don not understand how a gamma ray with no mass can all of a sudden be broken down into the two parts, and electron and a positron which have a mass.
Many thanks for any replies with the slightest help, as I am completely lost on these equations plus similar ones.
Thanks,
Pavadrin