Results
author = "Gould, C.R."
Optical-Model Description of Time-Reversal Violation
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
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
Author(s) :
Wilburn, W. S.
,
Gould, C. R.
,
Hale, G. M.
,
Huffman, P. R.
,
Keith, C. D.
,
Roberson, N. R.
,
Tornow, W.
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