Josefin Martell

Josefin Martell

Doctoral Student

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My PhD project aims at testing different tomographic techniques to study geological materials such as meteorites and impactites.

  • Neutron tomography in planetary science

Neutron tomography has great potential within the field of planetary geology (and geological sciences in general) as it offers a non-destructive method to study precious materials. These could be meteorites or impactites ("impactite" is a general term that describe rock types formed or modified by impact cratering processes). Together with x-ray tomography it also enables a bi-modal approach to study rare or precious geological materials since x-rays and neutrons give complementary information about light and heavy elements. Tomographic methods further give three-dimensional information about the distribution of elements and structures within the rock. In contrast to x-rays, neutron tomography can to date only be performed at a limited number of facilities. With the European Spallation Source (ESS), the city of Lund in Sweden will accommodate the world’s highest performing spallation source. 

  • Planetary geology

Around 190 impact craters have been documented on the Earth, but when looking at other planetary bodies in our solar system it becomes clear that collisions in space is and has been the most common (and violent?) geological process in our solar system. Collisions with the Earth have greatly contributed to forming our geological history, not only as it has scarred the surface of the Earth, but it has also had a large influence on the ecosystem. Meteorites can be divided into several classes, from dense iron meteorites to so called carbonaceous chondrites, a meteorite type that contains carbon. Little is known about what type of meteorites have hit the Earth, and one possible way to find out is to locate meteoritic material in rocks within the impact crater and analyse the content. To do this, the idea is to use neutron- and x-ray tomography as a first step in examining the material in situ.


Supervisors: Dr. Carl Alwmark (LU), Dr. Robin Woracek (ESS), Dr. Luke Daly (Glas.), Prof. Christian Bender Koch (KU), Prof. Dr. Markus Strobl (PSI)


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