author = "Gould, C.R."

Found 24 documents, displaying page 1 of 3

## Optical-Model Description of Time-Reversal Violation

Author(s) : Hnizdo, V. , Gould, C. R.
Description : A time-reversal-violating spin-correlation coefficient in the total cross section for polarized neutrons incident on a tensor rank-2 polarized target is calculated by assuming a time-reversal-noninvariant, parity-conserving five-fold" interaction in the neutron-nucleus optical potential. Results...
Repository : arXiv
Language(s) : Undetermined

## Lutetium thermometry for Oklo natural reactors: a new look at old data

Description : Lutetium thermometry has been used to analyze Oklo natural nuclear reactor zones but leads to widely varying and puzzling predictions for the temperatures $T_O$ which in turn impacts bounds on time variation of the fine structure constant $\alpha$. We revisit results for reactor zone RZ10 in light...
Repository : arXiv
Language(s) : Undetermined

## La138/139 Isotopic Data and Neutron Fluences for Oklo RZ10 Reactor

Description : Recent years have seen a renewed interest in the Oklo phenomenon, particularly in relation to the study of time variation of the fine structure constant. The neutron fluence is one of the crucial parameters for Oklo reactors. Several approaches to its determination were elaborated in the past. We ...
Repository : arXiv
Language(s) : Undetermined

## A Microscopic T-Violating Optical Potential: Implications for Neutron-Transmission Experiments

Description : We derive a T-violating P-conserving optical potential for neutron-nucleus scattering, starting from a uniquely determined two-body $\rho$-exchange interaction with the same symmetry. We then obtain limits on the T-violating $\rho$-nucleon coupling $\overline{g}_{\rho}$ from neutron-transmission e...
Repository : arXiv
Language(s) : Undetermined

## Extraction of bounds on time-reversal non-invariance from neutron reactions

Author(s) : Davis, E. D. , Gould, C. R.
Description : Ratios involving on-resonance measurements of the three-fold and five-fold correlation cross sections for which the dependence on some of the unknown spectroscopic data is eliminated are considered. Closed form expressions are derived for the statistical distributions of these ratios. Implications...
Repository : arXiv
Language(s) : Undetermined

## Gamma-ray fluxes in Oklo natural reactors

Description : Uncertainty in the operating temperatures of Oklo reactor zones impacts the precision of bounds derived for time variation of the fine structure constant $\alpha$. Improved $^{176}$Lu/$^{175}$Lu thermometry has been discussed but its usefulness may be complicated by photo excitation of the isomeri...
Repository : arXiv
Language(s) : Undetermined

## Time-variability of alpha from realistic models of Oklo reactors

Description : We reanalyze Oklo $^{149}$Sm data using realistic models of the natural nuclear reactors. Disagreements among recent Oklo determinations of the time evolution of $\alpha$, the electromagnetic fine structure constant, are shown to be due to different reactor models, which led to different neutron s...
Repository : arXiv
Language(s) : Undetermined

## CRIB (clinical risk index for babies) in relation to nosocomial bacteraemia in very low birthweight or preterm infants.

Description : Positive blood cultures in very low birthweight or preterm infants usually reflect bacteraemia, septicaemia, or failure of asepsis during sampling and lead to increased costs and length of stay. Rates of nosocomial, or hospital acquired, bacteraemia may therefore be important indicators of neonatal ...
Repository : Europe PubMed Central
Language(s) : English

## New battery model and state-of-health determination through subspace parameter estimation and state-observer techniques

Description : This paper describes a novel adaptive battery model based on a remapped variant of the well-known Randles' lead-acid model. Remapping of the model is shown to allow improved modeling capabilities and accurate estimates of dynamic circuit parameters when used with subspace parameter-estimation techni...
Repository : Whiterose Research Online
Language(s) : Undetermined

## Measurements at low energies of the polarization-transfer coefficient Kyy' for the reaction 3H(p,n)3He at 0 degrees

Description : Measurements of the transverse polarization coefficient Kyy' for the reaction 3H(p,n)3He are reported for outgoing neutron energies of 1.94, 5.21, and 5.81 MeV. This reaction is important both as a source of polarized neutrons for nuclear physics experiments, and as a test of theoretical descripti...
Repository : arXiv
Language(s) : Undetermined

Found 24 documents, displaying page 1 of 3