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    In the AQA June 2012 Unit 5 paper, Question 5C asks to make comparisons between the two methods of estimating the radius of the nucleus - Rutherford scattering and diffraction scattering.

    Include: Principles of each experiment
    Advantages/disadvantages of each
    Accuracy limitations


    I understand Rutherford's experiment but I don't know how it can be used to estimate the radius of the nucleus. I know you can determine the closest approach by making the kinetic energy = potential energy but how do you find the radius of the nucleus.

    Can someone also explain electron diffraction. I wasn't taught this and I don't understand the principles from the mark scheme.

    Thanks
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    anyone?
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    Think of the physics of the interactions

    Rutherford- how do alphas 'see' nuclei; also, what proportion of alphas undergo large deflections and how might that change if nuclei were large?

    Electrons- they will interact with both nuclei and orbital electrons

    Don't forget neutron diffraction too, unless electron diffraction was specifically required
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    (Original post by Cora Lindsay)
    Think of the physics of the interactions

    Rutherford- how do alphas 'see' nuclei; also, what proportion of alphas undergo large deflections and how might that change if nuclei were large?

    Electrons- they will interact with both nuclei and orbital electrons

    Don't forget neutron diffraction too, unless electron diffraction was specifically required
    Thanks for the response!

    I understand the physics of the interactions during Rutherford's scattering (The particles are repelled due to an electrostatic force?)
    Do you mean that the experiment does not give a definite estimation (a value). It just determines if the nucleus is small or big. So nuclei with larger radii will cause more alpha particles undergo large deflections.

    I don't understand electron scattering Do you have any resources to help
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