Abstract
Accelerator Mass Spectrometry is a technique commonly used to approach low concentrations of certain long half-life radioisotopes. The most important contribution of the technique is the accurate measure of organic sample ages, by separating masses 12,13 and 14 in the case of carbon allocated in such samples. However, the reach of AMS could cover many other scientific scopes, since it can give us a precise measure of a very small concentration of a radioisotope. On this direction, AMS can be used to approach reactions of interest for astrophysics, if we spot an specific radioisotope which concentration can be measure with AMS. Starting with this, we have selected specific reactions involving 14C, 10Be and 26Al, produced with slow neutrons from a reactor and positive ions at an accelerator. The main idea is to produce a particular reaction and later to measure the radioisotopic concentration using AMS. In this study our first results for 14C and 10Be nuclei produced with neutrons, and the preliminary results for 26Al nuclei produced with deuterium are shown.
Highlights
Most of times, to approach a good measurement of an specific nuclear reaction, those important for astrophysics, is a difficult task
We started 5 years ago a campaign of measurements to test the capabilities of the Accelerator Mass Spectrometry technique (AMS) as a possible tool to approach specific reactions in a direct way
The proposal of this technique starts with the fact that it may give an accurate value of the radioisotopic concentration contained in a certain sample; if such radioisotope is a product of an interesting reaction, this concentration is directly related to the total cross section of the reaction selected
Summary
To approach a good measurement of an specific nuclear reaction, those important for astrophysics, is a difficult task. It is always important to find alternative solutions, considering the big importance of the understanding of certain reactions with difficult access and essential for a better description of stellar and primordial nucleosynthesis On this direction, we started 5 years ago a campaign of measurements to test the capabilities of the Accelerator Mass Spectrometry technique (AMS) as a possible tool to approach specific reactions in a direct way. Some examples are 10Be, 14C, 26Al, 36Cl and 129I radioisotopes, whose half-lifes are among the thousands and millions of years Another important issue to consider when AMS is used, is to have a good radiochemical protocol to isolate the correct compound that can be studied with this technique. The different reactions studied, the facilities used and the results achieved will be described
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