Bulletin of the American Physical Society
2016 Fall Meeting of the APS Ohio-Region Section
Volume 61, Number 12
Friday–Saturday, October 7–8, 2016; Bowling Green, Ohio
Session E3: Photonics, Nanoscience and Photochemistry II |
Hide Abstracts |
Chair: Natalia Razgoniaeva, Bowling Green State University Room: 202 |
Saturday, October 8, 2016 1:30PM - 1:42PM |
E3.00001: Experimental Studies of $^{\mathrm{65}}$Cu($\alpha $,p) $^{\mathrm{68}}$Zn reaction for Nuclear Astrophysics Samuel Teye, Mohammed Islam, Richard deBoer, W Tan Nuclear reaction rates are necessary for the network of calculations for the understanding of the origin of elements. By studying these nuclear reactions, we can understand the full process of elemental synthesis and abundance. Production of heavier elements can also occur during the supernova explosion. ($\alpha $,p) reactions on elements heavier than iron may quickly produce heavier elements in short time. r- and s- processes are currently well understood. However, a third process, known as p- process may provide an understanding for the proton rich elements which cannot be explained by r- and s- processes. $^{\mathrm{65}}$Cu($\alpha $,p)$^{\mathrm{68}}$Zn experiment was conducted at the Nuclear Facility at the University of Notre Dame. The energy of the incident alpha particle ranges between 5 to 10 MeV. An array of solid state detectors placed at angles between 15 to 160 degrees was used so that data can be accumulated at various angles for a given incident energy, all at one time. Data at a different energy is obtained by simply changing the energy of the incident alpha particle. Experimental set up and the analysis of data will be reported. [Preview Abstract] |
Saturday, October 8, 2016 1:42PM - 1:54PM |
E3.00002: Effect of annealing temperature and environment on the structure and luminescence of CeYAG nanophosphors. Sahil Agarwal Yttrium Aluminum Garnet (YAG), Y$_{\mathrm{3}}$Al$_{\mathrm{5}}$O$_{\mathrm{12}}$ is one of the most important optical materials with many applications such as scintillation, laser host materials, detectors and phosphors. Nano YAG could offer many advantageous over bulk materials and large grain size phosphors. In this work Ce doped YAG (CeYAG) nanoparticles were synthesized using simple chemical methods and crystalized by annealing at various temperatures ranging from 600$^{\mathrm{^{\circ}}}$C -1500$^{\mathrm{^{\circ}}}$C. Photo-luminescence was recorded showing the increase in luminescence intensity with the increased annealing temperature. XRD analysis reveals the distortion in lattice as the annealing temperature goes beyond 1200$^{\mathrm{^{\circ}}}$C. Temperature induced photo-luminescence was studied for nanophosphor annealed at 1300$^{\mathrm{^{\circ}}}$C and was compared with the CeYAG ceramic and single crystal. Trapping phenomena were studied in CeYAG nanophosphors and ceramics by thermally stimulated luminescence spectroscopy and a comparison was made between them and CeYAG single crystals. Measurements concluded that trapping is dominated by crystal defects in single crystals and by trapping sites at the grain boundaries in ceramics. CeYAG nanophosphors-on the other hand- are free of traps, which seems to be characteristic of their small grain structure. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700