Describe the processes that take place inside the nucleus for the following decays; Beta- decay and Beta+ decay.

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Describe the processes that take place inside the nucleus for the following decays; Beta- decay and Beta+ decay.

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Farah 4 years 2021-08-04T23:28:38+00:00 1 Answers 13 views 0

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  1. Adela
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    2021-08-04T23:29:41+00:00
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    Answer:

    Explanation:

    (a) Electron Emission (Beta- decay):

    When an unstable nucleus decays by the emission of Beta- particle, its charge number ‘Z’ increases by 1 but, its mass number ‘A’ remains unchanged. The transformation is represented by the equation:  

    _zX^A\ -------->\ _{Z+1}Y^A\ +\ _{-1}e^0

    It is called ‘Negative Beta Decay’. It is more common than alpha decay.

    Example:

    _6C^{14}\ -------->\ _{7}N^{14}\ +\ _{-1}e^0

    Note:  

    There are no electrons in a nucleus so, with the emission of a particle, one of the neutrons is converted to a proton and an electron.

    _0n^1\ --------->\ _1P^1\ +\ _{-1}e^0

    (b) Positron Emission (Beta+ decay):

    When an unstable nucleus decays by the emission of the positron, its charge number ‘Z’ decreases by 1 but,  its mass number ‘A’ remains unchanged. The transformation is represented by the equation:

    _zX^A\ -------->\ _{Z-1}Y^A\ +\ _{+1}e^0

    Examples:

    _{15}P^{30}\ -------->\ _{14}Si^{30}\ +\ _{+1}e^0

    Note:  

    Inside the nucleus, only a proton can be transformed into a neutron with the emission of a positron (anti-particle of electron)

    _1P^1\ -------->\ _0n^1\ +\ _{+1}e^0

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