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 Karl Franzens University Graz

Graz University of Technology 

Aspects of ultracold neutron production in deuterium”
Dr. Malgorzata Kasprzak
Paul Scherrer Institut, Villigen, Schweiz)
17:00 - 18:15 Tuesday 08 April 2008 KFU

Ultracold neutrons are neutrons with energies of about 100 neV, that can be stored in bottles with lifetimes comparable to the free neutron lifetime (~ 15 min). The fact that one can store UCN for such long periods makes them an excellent tool to study fundamental properties of the neutron; for example the neutron lifetime and electric dipole moment (EDM). The accuracy of such experiments with the present UCN sources is limited by statistics. Next generation experiments, that aim to improve these sensitivities, depend on the development of higher intensity UCN sources. One of the ways to increase the UCN intensity is to use an appropriate material as UCN converter; i.e. a medium that converts cold neutrons into UCN.
The UCN source currently being built at PSI is based on solid deuterium as UCN converter. Over the past few years the experimental investigations concerning UCN production in D2 were carried on, leading to the understanding of the underlying physics. The results will be presented and discussed.