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Plug the GM tube into the scaler and set at the appropriate voltage (according to manufacturer’s instructions). Start the scaler to check it is counting - there will be sufficient background radiation to register a count.

Before bringing the source into the laboratory, a background count must be taken. Simultaneously start the scaler and stopclock. Stop the scaler after 20 minutes. Record the time,t, and the total count, N, on the scaler.

Set up the arrangement as shown in the diagram.

Put the source in its holder (observing safety procedures).

A few preliminary readings would be advantageous at this point, to establish the maximum distance at which a meaningful count can be taken – a count significantly above background is required to give useful data. Additionally, a count rate taken near to the source will enable counting times to be decided for smaller source-detector distances.

Set the distance from the front of the source to the front of the GM tube window, x, to 600 mm. (Assuming this distance gives a satisfactory count rate.)

Simultaneously start the timer and scaler, and take the count, N, after t = 5 minutes

(or 10 minutes if the total count is below 400).

Re-set the source position so that X = 500 mm from the GM tube and take the new total count after t = 5 minutes.

Repeat for source - GM tube distances X of 400 mm, 300 mm, 200 mm, 100 mm. (As the source is placed closer to the detector, a shorter timed counts will be satisfactory).

Record N, t, Xin a suitable table, allowing columns for count rate C = N/t and corrected count rate C’ (obtained by subtracting background count rate from C) and a final column for 1/√C’.

Plot a graph with 1/√C’on the y-axis and X on the x-axis

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Overview Video

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AQA A2 physics unit 5 part 1 overview of Nuclear and thermal physics unt 5 specification overview

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Hello and welcome, This is the first of a two section overview for the unit 5 side of AQA A2 physics. Enjoy !!

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Exam Questions + Answers

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http://www.physicsandmathstutor.com/

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Revise GCSE/IGCSEs and A-levels! Past papers, exam questions by topic, revision notes, worksheets and solution banks.

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A Level Physics: AQA Unit 5 Rutherford Scattering

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A description of the key elements of the Rutherford Scattering Experiment, what was known before and how conclusions were reached.

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Nuclear Fission

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A Level Physics: AQA Unit 5: Nuclear Fission

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A description of the key aspects of nuclear fission power plants.

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A Level Physics: AQA Unit 5: Nuclear Fusion

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A description of the key aspects of Nuclear Fusion and the key conditions required for it to occur.

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A Level Physics: AQA Unit 5: Decay and N Z Graphs

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A description of the key points for each of the types of decay and the causes.

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A description of the key information to know about half life and the other key equations surrounding radio-active materials.

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https://www.youtube.com/watch?v=Vg_j-FPXIHY

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A Level Physics: AQA Unit 5: Radiation Intensity

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A description to explain how intensity changes with distance

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A Level Physics: AQA Unit 5: Nuclear Radius and Density

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A description of the process of calculating nuclear radius and where the equation comes from. Also a discussion of the magnitudes of nuclear density.

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Alpha Scattering

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A Level Physics: AQA: Nuclear Physics: Alpha Scattering

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A description of the key observations and conclusions of Rutherford's Alpha Scattering Experiment. Also an example of calculating the distance of closest approach and an analysis of the limitations of this method of calculating nuclear radius.

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PREP DIARY

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http://www.physbot.co.uk/nuclear-physics.html

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Prep Exam Q + MS

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This video briefly explains the how the "Inverse Square Law" works and how it is a set of instructions. It includes 2 example problems.

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Alpha Particles | Nuclear Radiation Explained | Doc Physics

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Smoke detectors save lives. Replace your batteries today if you want to live. Helium nuclei. No electrons. Word to your mother.