Kinetic energy of an electron on the β spectrum?

In summary, the maximum kinetic energy of the electron in the β spectrum is 0.143 MeV, calculated by subtracting the excited state energy of 191Ir (0.171 MeV) from the Q value of the decay reaction (0.3139 MeV).
  • #1
richphys
18
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Homework Statement



A 191Os nucleus decays via β- emission to an excited state of 191Ir at 171 keV. What is the maximum kinetic energy of the electron on the β spectrum?
a) 0.134 MeV
b) 0.143 MeV
c) 0.171 MeV
d) 1.859 MeV

Homework Equations



191 Os = 190.960928u
191 Ir = 190.960591u

(190.960928u - 190.960591u) * 931.5MeV/u = 0.3139 MeV

0.3139 MeV - 0.171 MeV = 0.143 MeV

The Attempt at a Solution


[/B]
I am unsure if my answer of 0.143 MeV is correct. In my notes it says the maximum kinetic energy is equal to the Q value of the reaction, so I wokred out the Q value above then subtracted the "excited state" value.
 
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  • #3
Indeed
 

FAQ: Kinetic energy of an electron on the β spectrum?

1. What is the definition of kinetic energy of an electron on the β spectrum?

The kinetic energy of an electron on the β spectrum refers to the energy that an electron possesses due to its motion along the spectrum. It is a form of energy that is associated with the movement of particles and is expressed in units of joules (J).

2. How is the kinetic energy of an electron on the β spectrum calculated?

The kinetic energy of an electron on the β spectrum can be calculated using the formula KE = 1/2 * m * v^2, where m is the mass of the electron and v is its velocity. This formula is derived from the principles of classical mechanics.

3. What factors affect the kinetic energy of an electron on the β spectrum?

The kinetic energy of an electron on the β spectrum is affected by the mass and velocity of the electron. An increase in either of these factors will result in an increase in the kinetic energy of the electron.

4. How does the kinetic energy of an electron on the β spectrum relate to the energy spectrum?

The kinetic energy of an electron on the β spectrum is directly related to the energy spectrum. As the kinetic energy of the electron increases, its energy on the spectrum will also increase. This relationship is important in understanding the behavior of electrons in the β spectrum.

5. Why is the kinetic energy of an electron on the β spectrum significant in nuclear physics?

The kinetic energy of an electron on the β spectrum is significant in nuclear physics because it is a key factor in determining the properties and behavior of subatomic particles. It is also used in various experiments and calculations to understand the processes that occur within the nucleus of an atom.

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