The energy spectrum of  \beta -particles\left [ number\: N(E)as \: a \: function \: of\: \beta -energy\: E \right ]  emitted  from a  radioactive source is 

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

 

Answers (1)

As we learnt in

β Minus - decay -

^{A}_{Z}X\rightarrow _{Z+1}^{A}Y+\beta ^{-}+ \bar{\nu }+Q\ value

- wherein

\bar{\nu }\rightarrow anti \: neutrino

Q\: value =\left [ M_{X}-M_{Y} \right ]c^{2}

 

 Total energy is distrbuted between \beta particle and neutrino/Antineutrino.

Hence very few \beta particle will have low energy or highest energy.

Correct option is 4.


Option 1)

This is an incorrect option.

Option 2)

This is an incorrect option.

Option 3)

This is an incorrect option.

Option 4)

This is the correct option.

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