Nuclear

Multiple ion counting application note added to the downloads page (T10412)

Posted on 30th April, 2012

TIMS analysis of very small (picogram) sample loads results in ion signals that are small and short lived. Whilst the ion-counting Daly can be used in peak jumping mode for such samples, the constantly varying signal intensity really calls for a multi-collector approach and in these circumstances multiple ion-counting becomes the...

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New Application Note – Total evaporation (TE) of 500ng U500 using Phoenix TIMS

Posted on 16th September, 2011

High sensitivity measurements of U are of crucial importance in a number of fields. Whilst atom/ion efficiency of >1% has been achieved for point source methods using carbon, for analyses of larger U loads (~500 ng) using a standard filament assembly with no carbon the typical atom/ion efficiency is in the range 0.005% to 0.01%. To test the ionization efficiency and precision achievable...

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New application note on the downloads page – Measurement of NBS U010, NBL U030a and NBL U050 uranium standards by total evaporation using the Phoenix TIMS.

Posted on 29th March, 2011

This note describes the performance of the Phoenix TIMS for total evaporation of small U loads using three CRM’s. Total evaporation removes the need for a mass fractionation correction since ions from across the entire run are collected and summed. The note highlights the Phoenix’s ability to attain precision of 0.03%...

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New Technical Note – Analysis of very large isotope ratios (236U/238U in IRMM184)

Posted on 24th January, 2011

A new technical note (G30111) describing the analysis of 236U/238U in the SRM IRMM184 has been added to the downloads page.

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