Heusler Polarisator H k -κ k‘ elastischer Beitrag

Polarisierte Neutronen – Elastische Streuung HF-Spinflipper H H k k -κ -κ k‘ k‘ Ioff Ion z.B. b=1 m=10-2 (kl. Moment) dann ist Ion-Ioff=4.10-2 (vgl. m2=10-4) ermöglicht Formfaktor messungen an Reflexen und damit Spindichtebestimmung

Formfaktor-messungen Figure 1: The experimental values of the magnetic form-factor measured at the h0. Bragg reflections of Cr2O3. The smooth curve is the spin-only free ion form-factor for Cr3+ normalised to 2.5 µB.

Organic Magnets if L=0, then F(κ) is the Fourier transform of the spin density Experimental spin density in the Tetracyanoethylenide organic free radical-ion. Fourier data were obtained in polarized neutron diffraction experiments. Real-space density maps were than reconstructed with model-enhanced Maximum Entropy method. A. Zheludev, et. al. J. Am. Chem. Soc. 116, 7243-7249 (1994).

IN20 Heusler Monochromator Helmholtz Coils Heusler Analyzer

Polarisierte Neutronen+ Polarisationsanalyse w v u k k k -κ -κ -κ k‘ k‘ k‘ P||κ||u Pκ,P||v Pκ,P||w

Backscattering IN16 (ILL) Mono Si 111 Ana Si 111 E-Resolution 1.10-3 meV E-range +/- 0.015meV

Neutron Tomography Tomography with fast neutrons - camera with roll of film

Diffraction Model of two insulin molecules containing zinc ions (balls). Insulin molecules pick up zinc ions when crystallized for neutron diffraction studies, which have revealed the structure of insulin. Image courtesy of Brookhaven National Laboratory. This neutron-scattering study carried out at the Intense Pulsed Neutron Source, Argonne National Laboratory, produced data for a model that shows peptides (cylinders) inserting themselves in holes they form in a cell membrane.

Doping of Si                                                                                            The doping is achieved by neutron capture and the resultant conversion of individual 30Si atoms into 31P with the P concentration in the Si being adjustable by varying the duration of irradiation.

Production of radioisotopes for medical applications

Around 3000 BP, the biggest change is not the appearance of ceramic Around 3000 BP, the biggest change is not the appearance of ceramic. The major revolution is the rapid establishment of a large network known as the Meadowood interaction sphere. Norman Clermont published the cemetery at Pointe-du-Buisson in 1978 and the latest addition for this time period comes from the Quebec City area. Yves Chrétien excavated a small component with a particular Early Woodland ritual including close to two hundred quaternary blades made of typical Onondaga chert. These offerings indicate that the inhabitants of the Quebec City area were participating in the Meadowood network. Neutron activation analysis of Vinette 1 ceramic fragments from Pointe-du-Buisson has revealed that the majority of the samples were obtained through that network and not produced with the local clay, which is considered by local potters as a very good source to make pots. As for the Middlesex funerary complex, investigated by Norman Clermont, it is still problematical culturally and chronologically.

Axial Residual Stress Map in weld plate Stress analysis. Axial Residual Stress Map in weld plate Contour Method: Calculating Stress Using Finite Elements

Medicine Louis Pasteur's theory of germs is ridiculous fiction. (P. Pachet, Professor of physiology at Toulouse, 1872) 1930's - Sir James Chadwick discovers the neutron (Nobel Prize, 1935.) Cyclotrons are first used in trials to treat cancer using neutrons at the University of California at Berkeley. Trials are stopped when the cyclotron is needed for the war effort. 1960's - Diagnostic ultrasound is first used. Neutrons are shown to be effective in treating certain types of cancerous tumors, and begin to be used clinically. 1970's - The Neutron Therapy Facility at Fermilab is built and begins treating patients.

Converter Cross-section of the FRM-II's centre for tumour therapy