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Full-Text Articles in Physics

Quantum Defect Measurements For High Angular Momentum Rydberg States Of Potassium, Abraham Hill Jan 2020

Quantum Defect Measurements For High Angular Momentum Rydberg States Of Potassium, Abraham Hill

Honors Theses

We report measurements of the quantum defect for the f-, g-, and h-states of potassium with principal quantum number n between 26 and 29. Ground state potassium atoms in a magneto-optical trap are excited from the 4s state to the 5p state, then from the 5p state to the ndj state using lasers at 405nm and 980nm, respectively. We then measure the millimeter wave frequencies of the ndj to nl transitions. We extract the quantum defects from these frequency measurements in conjunction with the known d-state quantum defects. Experimental challenges with …


Effects Of Energy Resolution And Bin Size On The Measurements Of Nuclear Neutron Distributions Using Coherent Elastic Neutrino-Nucleus Scattering, Hongyong Zhang Jan 2020

Effects Of Energy Resolution And Bin Size On The Measurements Of Nuclear Neutron Distributions Using Coherent Elastic Neutrino-Nucleus Scattering, Hongyong Zhang

Honors Theses

Coherent elastic neutrino-nucleus scattering is a process that involves the neutral-current scattering of a neutrino with an entire nucleus, which probes more bulk properties of the nucleus. Using the Taylor expansion of the form factors and calculation of effective moments that sums over isotopes, we successfully simulate the events for coherent elastic neutrino-nucleus scattering for detectors using Ar and Ge and demonstrate that coherent elastic neutrino-nucleus scattering can determine both the second moment and the fourth moment. Running the Monte Carlo simulation using a detector filled with 10 tonnes of natural germanium, a neutrino flux of 3*10^7 neutrinos per second …