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Letter: For the record

Published 24 May 2003

• In the letter from Clive Semmens (10 May, p 26) an editing error led to the decay product of thorium-234 (Th-234) being give as palladium (Pd). It is in fact protactinium-234m (Pa-234m).

Issue no. 2396 published 24 May 2003

Â鶹´«Ã½ issue 2396 cover

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