A small piece of papyrus is to be 14 C dated using AMS During a 10 minute run with the system set to record 14 C, 1500 ions are counted With the system set to transmit 12 C 3 ions, the beam current is 12 A (a) Compute the 14 C 12 C ratio, assuming both isotopes are transmitted with the same efficie...

A small piece of papyrus is to be 14 C-dated using AMS. During a 10-minute run with

Question:

A small piece of papyrus is to be ¹⁴C-dated using AMS. During a 10-minute run with the system set to record ¹⁴C, 1500 ions are counted. With the system set to transmit ¹²C⁺³ ions, the beam current is 12 μA.

(a) Compute the ¹⁴C/¹²C ratio, assuming both isotopes are transmitted with the same efficiency.

(b) If the entire sample is consumed in 75 minutes, what was the mass of ¹²C it contained? (Assume a constant consumption rate and an efficiency of 0.015.

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