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The Random Nature of Radiation

Work Sheet

The Random Nature of Radiation

Grade		Class		Student ID number
Name

■The Random Nature of Radiation
Radiation is emitted from radioactive materials.
The amount of radiation from a source isn't always the same. It fluctuates, or changes, from measurement to measurement.

■Radiation Measurement (1)
Click the CSV button below to download the experimental data.

Monazite

CSV

CSV files: The columns (cells) of CSV files are arranged in the following order from left to right: Date, Time, Measured values, Latitude, Longitude, Altitude, and Total Count. Find the information you need in the data and use it for your calculations and graph.

★Click the CSV button to download the data.

: Measuring a monazite sample with a radiation detector.

■Creating a Histogram (Frequency Distribution Graph)
Let's use Microsoft Excel to create a histogram of our measurement data.

: Monazite sample (without shielding),
total measurement time = 120 minutes

■Radiation measurement (2)
Let's calculate the average, variance, and standard deviation from the measured data, and fill in the table on the right.
◇Average: AVERAGE function in Excel
◇Variance σ²: VARP function in Excel
◇Standard deviation σ² (= square root of variance): STDEVP function in Excel

　Average：

　Variance：

　Standard deviation：