Krane

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Beta Decay Schemes
Krane
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b- decay
b decay
Prussin
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Prussin
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Effects of Fermi function on b spectra
Prussin
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large nuclear matrix element ? short comparative
half life
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Prussin
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Converts n ? p without changing spin
Converts n ? p with possible spin flip
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Beta decay schemes
Prussin

• DJ 0, Dp no
• Allowed Fermi and Gamow-Teller
• n(1s1/2) ? p(1s1/2)

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Prussin
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Prussin

• Consider b decay to excited state at 304.8 keV
• DJ 1, Dp no
• Allowed G-T
• Large branching ratio (96)
• No b decay observed to gs (3rd forbidden)

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Observation of 187Os growth as result of bound
state b decay of 187Re
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Parity violation in nuclear beta decay Parity
operator x ? - x, y ? - y, z ? - z
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Homework 5 due Wednesday Feb. 27 Prussin
Chapter 10 Problems 2, 3, 4, 6, 8
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86Kr
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