Bulletin of the American Physical Society
2008 Spring Meeting of the Ohio-Region Section of APS
Volume 53, Number 3
Friday–Saturday, March 28–29, 2008; Youngstown, Ohio
Session C5: Nuclear and High Energy Physics |
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Chair: James Carroll, Youngstown State University Room: Moser Hall 2350 |
Saturday, March 29, 2008 8:24AM - 8:36AM |
C5.00001: Trend Analysis of Nuclear Fuel Performance at Taiwan Talun Sung, Chung-Hsing Hu Because the price of oil is increasing dramatically, the substituted energies are fast developed: such as solar power, wind power and fuel cell. Nuclear energy is considered as another substituted energy source because it is low cost and low CO2 pollution. However, the price of nuclear fuel has been jumped to 7 times higher than that at 4 years ago. How to manage the fuel cycle to reduce the cost becomes a big issue for the nuclear power plants. There are several ways to improve such as increasing the enrichments and longer cycle periods. Dr. O'Sullivan and his team have investigated 18 PWR reactors in USA and the results have shown that these changes not only improve the fuel cycle cost but also reduce the safety margins. The authors warned these changes should be examined. Taiwanese power plants have done all these improvements like most other nuclear power plants did. Therefore, this study has collected the data of Taiwan's PWR reactors and examined the safety parameters such as F$\Delta $H, shutdown margin, moderator temperature coefficient (MTC). This report shows that the safety margins are not reduced as that of the pervious investigation but the MTC was more negative at the end of cycle than before. [Preview Abstract] |
Saturday, March 29, 2008 8:36AM - 8:48AM |
C5.00002: Radiation Imaging and Attenuation Candace Davison, Douglas Yocum X-ray and neutron images are used to demonstrate materials' different radiation attenuation properties. This leads to discussion of applications in medicine, industry and research. The Penn State Radiation Science and Engineering Center (RSEC) uses neutron radioscopy to image the inside of a working hydrogen fuel cell. This is one of the many educational activities that are conducted when students visit the RSEC. To encourage pre-college students to apply these principles and learn more about nuclear technology, we are sponsoring a design competition. For more information visit www.rsec.psu.edu [Preview Abstract] |
Saturday, March 29, 2008 8:48AM - 9:00AM |
C5.00003: Effects of a fundamental mass term in two-dimensional super Yang-Mills theory Uwe Trittmann We show that a vacuum expectation value of the perpendicular gauge boson in three-dimensional supersymmetric QCD generates mass terms for the fundamental fields, while supersymmetry stays intact. This is similar to the adjoint mass term that can be generated by a Chern-Simons term in this theory. We dimensionally reduce the theory to two dimensions, and study the spectrum of the ensuing model as a function of the new parameter $v:=\langle A^{\perp}\rangle$. [Preview Abstract] |
Saturday, March 29, 2008 9:00AM - 9:12AM |
C5.00004: Preliminary tests of induced depletion of $^{108m}$Ag using bremsstrahlung radiation Trevor Balint, Geoffrey Trees, Isaac Mills, Matthew Ragan, Nathan Caldwell, Thomas Harle, Robert Gurney, Marc Litz, George Merkel, Nino Pereira, Mike Helba, Hill Roberts, Joe Schumer, Sarkis Karamian, James Carroll It may be possible to utilize long-lived nuclear isomers to provide energy for certain applications. To do so, a method must be demonstrated to induce the depletion of nuclei within a sample that are metastable in an excited, isomeric state. An experiment is under way at Youngstown State University's X-ray Effects Laboratory as part of the Isomer Physics Project to test the effectiveness of the use of bremsstrahlung radiation as an inducing agent in the depletion of the 418-year $^{108m}$Ag isomer. This talk will discuss preliminary results, and experimental designs to increase the detection efficiency. [Preview Abstract] |
Saturday, March 29, 2008 9:12AM - 9:24AM |
C5.00005: Multi-detector coincidence techniques to test induced depletion of $^{178m2}$Hf at 331 keV Geoffrey Trees, Trevor Balint, Isaac Mills, Thomas Harle, Sarkis Karamian, James Carroll Recent experiments have suggested a possible transition at 331 keV in $^{178}$Hf that may allow induced depletion of its 31 year isomer. The probability of detecting events in experimental conditions is expected to be relatively low and will require techniques to distinguish between background radiation and induced events. The use of a PXI DSP system and two 4-fold HPGe Clover detectors will allow coincidence techniques to be applied. This talk will discuss the development and design of an experiment to test depletion of this isomer using 331 keV photons from bremsstrahlung at Youngstown State University's X-ray Effects Laboratory as part of the Isomer Physics Project. [Preview Abstract] |
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