Radioactive Decay

Experiment reportRadioactive decaySubject: physics
Group No.: 1-2A
Student No.: SH-10-0730G
Student Chinese Name: ??Student Name (Pinyin): Gu Weichen
Student English Name: Bill
Teacher Name: Channa Phillip
Date: 2011-3-18 Title | Introduction | Apparatus and Method | Measurements | Processing | Discussion |
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Conclusion | References | English | Total | Comments |
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Experiment reportRadioactive decayNAME: Bill
PIN YIN: Gu Weichen
PERSON ID: SH-10-0730G
CLASS NUMBER: ENG 1-2AIntroduction
1. Simulate radioactive decay in the Excel to get the decay constant.
2. Find the ? which is the radioactive decay constant.
3. Analyze the error between the theoretical value of decay constant and experimental value of decay constant.Material:
Laptop, Microsoft Office ExcelTheory:
Half-life is the period of time, for a substance undergoing decay, to decrease by half.
?=ln2t1/2Where A is activity; N0 is the initial quantity of the nuclei; Nt is the quantity that the nuclei still remains and has not decayed after the time t; ? is the decay constant; t1/2 is the half-life of the nuclei.History:
Radioactivity was found by Becquerel in 1896 who won the Nobel Prize. He noticed the radioactivity by accident that uranium salt crystals can release a radiation to the photographic plate even it is covered in the box. Finally he found out the radioactivity.Method
1. Choose an element as the investigate substance from the Periodic Table and find the half-life. For example, silver (Ag108) and half-life of 418 years.
2. Open radioactive decay simulation program in the Excel and put the half-life into the Excel and get the decay constant.
3. Choose three different initial numbers of nuclei which range from 1~20, 100~1000 and…

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