S10P1CLec29B

S10P1CLec29B - Physics 1C Lecture 29B "Alpha decay is...

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Physics 1C Lecture 29B "Alpha decay is a rearranging: it doesn't change the total number of nucleons present in the formula, nor does it alter the net charge, but it does alter the net mass. Whenever such a rearrangement happens by itself, energy is liberated. .." --Eugene Hecht
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Quiz 5 Info It will be a Scantron test that covers Chapters 27, 28, and 29. A list of equations, constants, and conversions will be provided on the quiz. You are to write the version of your test on the Scantron form. You will use the Quiz Code Number that you were assigned at the Frst Quiz. You are expected to abide by UC Policy on Integrity of Scholarship.
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From Last Time Alpha particles are just Helium nuclei without the 2 electrons, so they are positively charged (2e). Beta particles are electrons; but they may be either negatively (-e) or positively charged (+e). They can only penetrate lightly into metals. Alpha particles are massive and charged, so they do not penetrate most materials.
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Radioactivity Gamma particles are high energy photons. Gamma particles are not charged and have no mass, so they can penetrate deeply in most materials. They can penetrate deeply into lead. The three different particles can be separated in a B Feld.
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Radioactivity The number of particles that decay ( Δ N) in a given time ( Δ T) is proportional to the total number of particles (N) in a radioactive sample. Δ
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This note was uploaded on 06/03/2010 for the course PHYS PHYS 1C taught by Professor F during the Spring '00 term at UCSD.

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S10P1CLec29B - Physics 1C Lecture 29B "Alpha decay is...

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