Reconciliation of experimental and theoretical electric tensor polarizabilities of the cesium ground state

We present a new theoretical analysis of the strongly suppressed F- and M-dependent Stark shifts of the Cs ground state hyperfine structure. Our treatment uses third order perturbation theory including off-diagonal hyperfine interactions not considered in earlier treatments. A numerical evaluation of the perturbation sum using bound states up to n=200 yields ground state tensor polarizabilities which are in good agreement with experimental values, thereby bridging the 40-year-old gap between experiments and theory. We have further found that the tensor polarizabilities of the two ground state hyperfine manifolds have opposite signs, in disagreement with an earlier derivation. This sign error has a direct implication for the precise evaluation of the blackbody radiation shift in primary frequency standards.Comment: 7 pages, 2 figures, accepted for publication in Europhysics Letter

Timeline: The Founding of F-CHEC and Its Conduct of a MTA-Funded Research Project

The following timeline chronicles the formation of F-CHEC and the conduct of its first research project funded by the Citizens’ Monitoring and Technical Assessment (MTA) Fund. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1001/thumbnail.jp

F-CHEC Water Quality Database Overview

Document giving an overview of the Water Quality Database created by The Fernald Community Health Effects Committee, Inc. (F-CHEC) and the University of Cincinnati Environmental Health Foundation (UEHF). The database was part of the research aimed at identifying and reviewing existing information on contaminants of water in wells and cisterns within the five-mile exposure domain of the former Fernald Uranium Processing Plant. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1005/thumbnail.jp

Well Database Appendix

Appendix for the Well Database created by The Research Team (consisting of The Fernald Community Health Effects Committee, Inc. (F-CHEC) and the University of Cincinnati Environmental Health Foundation (UEHF)) to determine the location of each well within the five-mile exposure domain surrounding the former Fernald Uranium Processing Plant. The townships of interest were Fairfield, Morgan and Ross Townships in Butler County and Colerain, Crosby, Harrison and Whitewater Townships in Hamilton County. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1004/thumbnail.jp

Enhanced grain surface effect on magnetic properties of nanometric La0.7Ca0.3MnO3 manganite : Evidence of surface spin freezing of manganite nanoparticles

We have investigated the effect of nanometric grain size on magnetic properties of single phase, nanocrystalline, granular La0.7Ca0.3MnO3 (LCMO) sample. We have considered core-shell structure of our LCMO nanoparticles, which can explain its magnetic properties. From the temperature dependence of field cooled (FC) and zero-field cooled (ZFC) dc magnetization (DCM), the magnetic properties could be distinguished into two regimes: a relatively high temperature regime T > 40 K where the broad maximum of ZFC curve (at T = Tmax) is associated with the blocking of core particle moments, whereas the sharp maximum (at T = TS) is related to the freezing of surface (shell) spins. The unusual shape of M (H) loop at T = 1.5 K, temperature dependent feature of coercive field and remanent magnetization give a strong support of surface spin freezing that are occurring at lower temperature regime (T < 40 K) in this LCMO nanoparticles. Additionally, waiting time (tw) dependence of ZFC relaxation measurements at T = 50 K show weak dependence of relaxation rate [S(t)] on tw and dM/dln(t) following a logarithmic variation on time. Both of these features strongly support the high temperature regime to be associated with the blocking of core moments. At T = 20 K, ZFC relaxation measurements indicates the existence of two different types of relaxation processes in the sample with S(t) attaining a maximum at the elapsed time very close to the wait time tw = 1000 sec, which is an unequivocal sign of glassy behavior. This age-dependent effect convincingly establish the surface spin freezing of our LCMO nanoparticles associated with a background of superparamagnetic (SPM) phase of core moments.Comment: 41 pages, 10 figure

How to Use the Well Database

Document giving an overview on how to use the Well Database created by The Fernald Community Health Effects Committee, Inc. (F-CHEC) and the University of Cincinnati Environmental Health Foundation (UEHF). The database was part of the research aimed at identifying and reviewing existing information on contaminants of water in wells and cisterns within the five-mile exposure domain of the former Fernald Uranium Processing Plant. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1006/thumbnail.jp

How to Use the Water Quality Database

Document giving an overview on how to use the Water Quality Database created by The Fernald Community Health Effects Committee, Inc. (F-CHEC) and the University of Cincinnati Environmental Health Foundation (UEHF). The database was part of the research aimed at identifying and reviewing existing information on contaminants of water in wells and cisterns within the five-mile exposure domain of the former Fernald Uranium Processing Plant. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1007/thumbnail.jp

Timeline: Key Events that Lead to the Installation of a Public Water Supply for Fernald Area Residents

A timeline that tracks the key events leading to the Installation of a public water supply for Fernald Area Residents. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1008/thumbnail.jp

Well Database Overview

The Fernald Community Health Effects Committee, Inc. (F-CHEC) partnered with the University of Cincinnati Environmental Health Foundation (UEHF) to conduct research aimed at identifying and reviewing existing information on contaminants of water in wells and cisterns in the five-mile exposure domain of the former Fernald uranium processing plant. The F-CHEC and UEHF partnership is hereinafter called the Research Team. The Research Team determined that the existent information on well use in the five-mile exposure domain did not include either the number or the locations of offsite water wells within the exposure domain. Therefore, it was apparent that this project should include a database of offsite water wells within the five-mile exposure domain. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1003/thumbnail.jp

F-CHEC Cistern Survey Results

The Fernald Community Health Effects (F-CHEC) Cistern Use and Maintenance Survey was conducted to compile information about the historical and current use and maintenance patterns of Fernald area residents with cisterns. This research was completed money allocated during Round 4 of the Citizens’ Monitoring and Technical Assessment Fund (MTA Fund). Clark University was named conservator of these works. If you have any questions or concerns please contact us at [email protected]://commons.clarku.edu/fchec/1002/thumbnail.jp