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Physics · May / June 2024 · Paper 42 · Question 9

0625

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  • 9(a)(i)[2]

    any two from:

    reduce exposure time AND low(er) amount of radiation absorbed
    increase distance between source and hospital staff AND lower amount of radiation reaches staff
    use of shielding (e.g. walls, lead etc.) AND radiation absorbed by shielding / cannot penetrate through shielding
    use isotopes with short half-life AND lower amount of radiation emitted from patient / radiation (above background) emitted for a shorter period of time
    use of film badge / dosimeter AND manage individuals exposure owtte
    restrict pregnant staff / patient in hospital AND radiation may harm foetus owtte

  • 9(a)(ii)[2]

    high ionisation (within body)

    radiation would not reach detector (outside body)

  • 9(b)[3]

    24

    24

    + β

    0

    Na

    Mg

    11

    12

    -1

    24

    Na

    on LHS

    11

    0 on RHS

    -1

    24

    Mg

    on RHS

    12

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