NUCLEAR PHYSICS - Stony Brook University
NUCLEAR PHYSICS - Stony Brook University
NUCLEAR PHYSICS - Stony Brook University
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Accelerator Mass Spectrometry<br />
• AMS is well established for 14 C, 10 Be, 26 Al, 36 Cl,<br />
41 Ca, 129 I.<br />
• 14 C is the familiar “dating” isotope for biological<br />
samples.<br />
• Living materials contain 14 C/ 12 C~10 -12<br />
• After death, ratio decays t 1/2 =5730 yr<br />
• Accelerator used to strip ions to +3 charge state,<br />
eliminating molecules.<br />
• 12 C via beam current, 14 C via count rate
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