Determination of isotope ratio using the gamma-particle coincidence method

by Paula Allegro (University of São Paulo)

Tuesday 10 Oct 2017, 16:00 → 17:00 Europe/Rome

Aula Voci (Dipartimento di Fisica "G. Galilei")

Isotopic ratio measurements are important for archaeological and geological dating, provenance of materials, nuclear technology, environmental studies and biomedical applications. Several techniques are used to measure isotope ratios, such as Accelerator Mass Spectrometry, Inductively coupled plasma mass spectrometer and Thermal ionization mass spectrometry. All of them need to prepare samples that are destroyed in the measurement process.
An alternative method is to determine an isotope ratio through measurements of nuclear reactions with gamma-particle coincidences. The advantage of this technique in relation to others is that itis not necessary to digest or to take a sample of the material to be analyzed, being an ideal technique to apply in Cultural Heritage materials and precious gems.
In this seminar, recent results on the used the gamma-particle coincidence method in proton-induced reactions to measure the isotope ratio of a sandwiched sample of natCu and 65Cu will be presented and discussed.