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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Characterizing New Calibration Sources In Liquid Xenon Dark Matter Searches, Evan P. Bray, Rafael Lang, Sean Macmullin
Characterizing New Calibration Sources In Liquid Xenon Dark Matter Searches, Evan P. Bray, Rafael Lang, Sean Macmullin
The Summer Undergraduate Research Fellowship (SURF) Symposium
In order to use the XENON1T liquid xenon detector as a means for detecting dark matter, the response to nuclear and electronic recoils must be well calibrated. Electronic-recoil calibration of XENON1T will be done by using the noble gas radon-220 that emanates from a custom thorium-228 source to observe the electron recoils that its daughter elements induce in liquid xenon. A silicon PIN diode was constructed to ensure that the Th228 source does not contaminate the system with the long-lived isotopes Th228 (T1/2 of 1.9 y) or Radium-224 (T1/2 of 3.6 d). The PIN diode was fixed in a custom …
Ice Caves On Extraterrestrial Bodies: What Are The Prospects For Speleogenesis And Detection?, Penelope J. Boston
Ice Caves On Extraterrestrial Bodies: What Are The Prospects For Speleogenesis And Detection?, Penelope J. Boston
The International Workshop on Ice Caves
Potential mechanisms for creating cavities in icy extraterrestrial bodies have been tentatively explored by several authors. On one hand we have examples of mechanisms that create caves in water ice here on Earth. In addition, there may be unique mechanisms on other Solar System objects that do not occur on Earth but might produce cavities, e.g. sublimation of comets upon perihelion passage. The methods of detecting such cavities depend upon the nature of the icy body in question, the potential for orbital or landed missions to visit those bodies in the future, and remote or landed methods for detecting the …
Where Did The First Generation Of Stars Form In The Universe, Long Yan Yung, Aparna Venkatesan
Where Did The First Generation Of Stars Form In The Universe, Long Yan Yung, Aparna Venkatesan
Creative Activity and Research Day - CARD
The first generation of stars in the universe are expected to contain no heavy elements beyond helium, and are considered “metal-free” Population III stars (or Pop III). These metal-free stars in the early universe are predicted to have hard ionizing photon spectra and unique element yields from their supernovae, leaving signatures through the reionization of the intergalactic medium and the metal enrichment of gas in the early universe. Here, we examine the metal abundances in a variety of systems in the nearby universe, from very metal-poor Galactic halo stars to ultra-faint dwarf spheroidal galaxies, and compare them with the latest …
Supernovae Wavelet Spectral Index Method: A Step Toward Precision Cosmology, Andrew J. Wagers, Lifan Wang, Steve Asztalos
Supernovae Wavelet Spectral Index Method: A Step Toward Precision Cosmology, Andrew J. Wagers, Lifan Wang, Steve Asztalos
The Research and Scholarship Symposium (2013-2019)
As cosmological probes, Type Ia Supernovae are some of the most useful. These exploding stars are used to measure cosmic distances and are useful to test and refine cosmological models. While SNe Ia are extremely uniform, the need for more precise measurements of the peak magnitude has led to the development of methods to correct current measurements for statistical errors. The work presented here has developed a new method for measuring the strength of spectral lines with a goal of using them as a basis for correcting the measured peak magnitudes. Wavelets were used to decompose the spectra so that …
Session B-5: Planetary Science And The Ngss, Eric Hawker
Session B-5: Planetary Science And The Ngss, Eric Hawker
Professional Learning Day
The goal of this session is to use what we understand about other planets and moons in our Solar System in order to get a better understanding of the Earth.
Welcome And Opening Remarks, Rick C. Chappell
Welcome And Opening Remarks, Rick C. Chappell
Magnetospheric-Ionospheric Coupling Conference
No abstract provided.
City Of Baxley: Solar Analysis, Bentley Wilkerson, Renaldo Leon
City Of Baxley: Solar Analysis, Bentley Wilkerson, Renaldo Leon
Georgia Municipal Association Practicum
No abstract provided.