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Local Structure of La1-xSrxCoO3 determined from EXAFS and neutron PDF studies (open access)

Local Structure of La1-xSrxCoO3 determined from EXAFS and neutron PDF studies

The combined local structure techniques, extended x-ray absorption fine structure (EXAFS) and neutron pair distribution function analysis, have been used for temperatures 4<= T<= 330 K to rule out a large Jahn-Teller (JT) distortion of the Co-O bond in La1?xSrxCoO3 for a significant fraction of Co sites (x<= 0.35), indicating few, if any, JT-active, singly occupied eg Co sites exist.
Date: January 26, 2009
Creator: Sundaram, N.; Jiang, Y.; Anderson, I. E.; Belanger, D. P.; Booth, C. H.; Bridges, F. et al.
System: The UNT Digital Library
Dalitz Plot Analysis of Ds+->pi+pi-pi+ (open access)

Dalitz Plot Analysis of Ds+->pi+pi-pi+

A Dalitz plot analysis of {approx} 13, 000 D{sub s}{sup +} decays to {pi}{sup +}{pi}{sup +}{pi}{sup -} has been performed. A 384 fb{sup -1} data sample, recorded by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring running at center of mass energies near 10.6 GeV, is used. Amplitudes and phases of the intermediate resonances which contribute to this final state are measured. A high precision measurement of the ratio: {Beta}(D{sub s}{sup +} {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -})/{Beta}(D{sub s}{sup +} {yields} K{sup +}K{sup -}{pi}{sup +}) = 0.199 {+-} 0.004 {+-} 0.006 is performed. Using a model independent partial wave analysis the amplitude and phase of the S-wave have been measured.
Date: January 26, 2009
Creator: Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
System: The UNT Digital Library
LADTAP-PROB: A PROBABILISTIC MODEL TO ASSESS RADIOLOGICAL CONSEQUENCES FROM LIQUID RADIOACTIVE RELEASES (open access)

LADTAP-PROB: A PROBABILISTIC MODEL TO ASSESS RADIOLOGICAL CONSEQUENCES FROM LIQUID RADIOACTIVE RELEASES

The potential radiological consequences to humans resulting from aqueous releases at the Savannah River Site (SRS) have usually been assessed using the computer code LADTAP or deterministic variations of this code. The advancement of LADTAP over the years included LADTAP II (a computer program that still resides on the mainframe at SRS) [1], LADTAP XL{copyright} (Microsoft Excel{reg_sign} Spreadsheet) [2], and other versions specific to SRS areas such as [3]. The spreadsheet variations of LADTAP contain two worksheets: LADTAP and IRRIDOSE. The LADTAP worksheet estimates dose for environmental pathways including ingestion of water and fish and external exposure resulting from recreational activities. IRRIDOSE estimates potential dose to individuals from irrigation of food crops with contaminated water. A new version of this deterministic methodology, LADTAP-PROB, was developed at Savannah River National Laboratory (SRNL) to (1) consider the complete range of the model parameter values (not just maximum or mean values), (2) determine the influences of parameter uncertainties within the LADTAP methodology, to perform a sensitivity analysis of all model parameters (to identify the input parameters to which model results are most sensitive), and (3) probabilistically assess radiological consequences from contaminated water. This study presents the methodology applied in LADTAP-PROB.
Date: January 26, 2009
Creator: Foley, Trevor Q.; Farfan, Eduardo B. & Jannik, G. Timothy
System: The UNT Digital Library
Narrowing of the Neutron Sd-Pf Shell Gap in 29Na: First in-Beam Gamma-Ray Spectroscopy Results Using TIGRESS at ISAC-II (open access)

Narrowing of the Neutron Sd-Pf Shell Gap in 29Na: First in-Beam Gamma-Ray Spectroscopy Results Using TIGRESS at ISAC-II

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Date: January 26, 2009
Creator: Hurst, A. M.; Wu, C. Y.; Becker, J. A.; Stoyer, M. A.; Pearson, C. J.; Hackman, G. et al.
System: The UNT Digital Library