.................................................................................................................................. iii ACKNOWLEDGEMENTS ............................................................................................................ v TABLE OF CONTENTS ............................................................................................................... vi L...

Ac There is currently a need for highly accurate measurements of fission neutron multiplicity ( ̅) and spectrum for U particularly in the range of sub 1 MeV fission neutron energy. These measurements increase the accuracy of calculations used to model nuclear fission systems. Gamma tagging is a new method for accurately measuring these quantities. This method utilizes an array of gamma detectors...

Fission tracks with a range 19% longer than tracks produced by uranium fission fragments were observed on mylar foils after a three year underground (100 m w. e.) exposure to 3600 cm2 of radlogemc lead. Ordinary lead which was simultaneously exposed to mylar foils under the same conditions yielded a background effect of only 3% of the effect from radiogenic lead. The observed long-range tracks ...

In geological minerals, tracks of fragments from spontaneous fission of U nuclei accumulate over geological time scales and are widely used for fission-track dating and thermochronology [1, 2]. In our recent studies, we tackled the problem how solids exposed to energetic heavy ions cope with the simultaneous exposure of external pressure. This combination of ion irradiation and pressure is suit...

Here we present the ELI Gamma Above Neutron Threshold setup recently implemented at Extreme Light Infrastructure – Nuclear Physics. The main goals of detector array are presented, as well mechanical design and performance individual detectors. In addition, have performed Geant4 simulations for realistic beam conditions. Finally, show a whole outline analysis procedure complex experimental measu...

A novel method was developed to separate the 238 U fission contribution measured in quasi-differential time-of-flight scattering experiments order isolate elastic and inelastic events. Pulse height distributions from in-beam measurements were used generate response functions, which reconstruct prompt neutron spectra. This validated by reconstructing 252 Cf spontaneous pulse distribution. Monte ...

Formation of membrane necks is crucial for fission and fusion in lipid bilayers. In this work, we seek to answer the following fundamental question: what is the relationship between protein-induced spontaneous mean curvature and the Gaussian curvature at a membrane neck? Using an augmented Helfrich model for lipid bilayers to include membrane-protein interaction, we solve the shape equation on ...

Spontaneous fission barriers, quadrupole inertia, and zero-point quadrupole-energy corrections are calculated for 252,256,258 Fm in the framework of the self-consistent Skyrme-Hartree-Fock+BCS theory. Two ways of computing dynamical inertia are employed: the Gaussian Overlap Approximation to the Generator Coordinate Method and crank-ing ansatz. The Skyrme results are compared with those of the ...