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Journals

Modeling Core-Hole Screening in Core-Excitation Spectroscopies

October 16, 2008

Author(s)

Eric L. Shirley, J A. Soininen, J J. Rehr

We consider screening of the core-hole potential experienced by the ejected electron in core-excitation processes. This potential affects near-edge structure...

Precise Wavelengths for Fe, Ge and Pt in the Region Near 1935

October 16, 2008

Author(s)

Gillian Nave, Craig J. Sansonetti

Wavelengths of seven spectral lines of Fe I, Ge I and Pt I between 1932 and 1938 have been measured with uncertainties of less than 1x10 -4 (5 parts in 10 8)...

IR Spectral Characterization of Customer Blackbody Sources: First Calibration Results

October 16, 2008

Author(s)

Sergey Mekhontsev, Mart Noorma, A Prokhorov, Leonard Hanssen

We summarize recent progress in our infrared (IR) spectral radiance metrology effort. In support of customer blackbody characterization, a realization of the...

Virtual-Real Quantum Interference in a Semiconductor System

October 16, 2008

Author(s)

H Ahn, S B. Choe, D S. Kim, J M. Shacklette, Y S. Lim

Probabability amplitude in the upper state can be induced by the off-resonant, virtual excitations as well as by the resonant, real excitations. Bytwo-color...

Analysis of High-Resolution Infrared and Ņ₁ CARS Spectra of ³⁴S¹⁸O₃

October 16, 2008

Author(s)

Tony Masiello, J Barber, E T. Chrysostom, J Nibler, A G. Maki, A Weber, Thomas A. Blake, R L. Sams

Three fundamental modes and several hot bands of 34S 18O 3 have been investigated using both infrared spectroscopy and coherent anti-Stokes Raman scattering...

Internal Dynamics in Organometallic Molecules: Rotational Spectrum of (Ch₃)₃GeC1

October 16, 2008

Author(s)

Melanie Schnell, Jens-Uwe Grabow

The microwave spectrum of (CH3)3GeC1 and its isotopologues (Ch3)372GeC1 and (CH3)3Ge37C1 has been studied in the frequency range from 3-24 GHz revealing the...

Atomic Transition Rates for Neutral Holmium (Ho I)

October 16, 2008

Author(s)

Gillian Nave

Transition rates for 325 lines of Ho I are presented. They have been measured by combining branching fractions obtained by Fourier transform spectrometry with...

Spin-Based All-Optical Quantum Computation With Quantum Dots: Understanding and Suppressing Decoherence

October 16, 2008

Author(s)

Tommaso Calarco, S K. Datta, P Fedichev, E Pazy, W.H. Zoller

We present an all-optical implementation of quantum computation using semiconductor quantum dots. Quantum memory is represented by the spin of an excess...

The Fundamental Physical Constants: A New Set of Recommended Values of the Basic Constants and Conversion Factors of Physics and Chemistry Incorporating Recent Data Has Just Been Issued by CODATA

October 16, 2008

Author(s)

Peter J. Mohr, Barry N. Taylor, David B. Newell

The Committee on Data for Science and Technology (CODATA) was established in 1966 as an interdisciplinary committee of the International Council of scientific...

Comment on Intrinsic Gap States in Semiconductor Nanocrystals

October 16, 2008

Author(s)

W Jaskolski, R -. Oszwaldowski, Garnett W. Bryant

We comment on the paper Intrinsic Gap States in Semiconductor Nanocrystals. We show that the predicted gap states are nanphysical and should not be used to...

Infrared and Raman Studies of the Verwey Transition in Magnetite

October 16, 2008

Author(s)

L V. Gasparov, D B. Tanner, D B. Romero, H Berger, G Margaritondo, L Forro

We present infrared and Raman measurements of magnetite (Fe 3O 4). This material is known to undergo a metal-insulator and a structural transition (Verwey...

Raman Scattering Study of High-Frequency Continuum Enhancement in La_1.475Nd_0.4Sr_0.125CuO₄

October 16, 2008

Author(s)

B Nachumi, N Ichikawa, Y Nakamura, S Uchida

We investigate the temperature and polarization dependences of the Raman scattering intensity in a single crystal sample of La 1.475Nd 0.4Sr 0.125CuO 4which is...

Measurements of Refraction in the Deep and Vacuum Ultraviolet Uusing the Minimum Deviation Method

October 16, 2008

Author(s)

John H. Burnett, R Gupta, Ulf Griesmann

We discuss a procedure to make accurate measurements of the index of refraction, its dispersion, and its temperature dependence, in the deep ultraviolet (near...

Using Graying Incidence X-Ray Reflectivity to Characterize Thin Films for Semiconductor Applications

October 16, 2008

Author(s)

C H. Russell, S M. Owens, A C. Diebold, R Deslattes

The application of grazing incidence x-ray reflectivity to the measurement of thin film thickness, interface width, and film density is described. Measurements...

An Experimental Study of Weak Intersystem Lines and Related Strong Persistent Lines of Ne II

October 16, 2008

Author(s)

John M. Bridges, Wolfgang L. Wiese

We have operated a high-current hollow cathode in pure neon at pressures from 93 Pa to 173 Pa and measured the branching fractions of Ne II emission lines...

In Search of Higher Sensitivity Pu Isotopic Analysis

October 16, 2008

Author(s)

Hiromu Kurosaki, D Chang, Kenneth G. Inn

Thermal ionization mass spectrometry (TIMS) is an effective method for isotopic and ultra-sensitivity determination of plutonium. This project aims at improving...

Rotationally inelastic scattering in CH₄+He, Ne, and Ar: State-to-state cross sections via infrared laser absoption spectroscopy in crossed jets

October 16, 2008

Author(s)

W B. Chapman, A Schiffman

Integral and differential state-to-state cross sections are reported for rotationally inelastic scattering in crossed jets of CH 4 with the rare gases He, Ne...

High Resolution X-Ray Scattering Methods for ULSI Materials Characterization

October 16, 2008

Author(s)

R J. Matyi

X-ray analytical methods with high angular resolution are becoming increasingly important for the characterization of materials used in ULSI fabrication...

Current Issues in Optical Diffraction Theory

October 16, 2008

Author(s)

Klaus Mielenz

This paper focuses on unresolved or poorly documented issues pertaining to Fresnel's diffraction theory and its various modifications. In Sec. 2 of the paper it...

The role of Lagrange multipliers in variational atomic structure calculations

October 16, 2008

Author(s)

C F. Fischer, Y Ralchenko

The importance of Lagrange multipliers in variational atomic structure calculations is discussed. Though in some instances they may not affect the energy...

NIST at the Bio, Information, Environment and Nanotechnology Interface

October 16, 2008

Author(s)

K B. Gebbie

New Critical Compilations of Atomic Transition Probabilities

October 16, 2008

Author(s)

Wolfgang L. Wiese, Jeffrey R. Fuhr, Daniel E. Kelleher, Larissa Podobedova

At the National Institute of Standards and Technology (NIST), we are continuing our critical evaluation and compilation work on atomic transition probabilities...

Excitions in Quantum-Dot Quantum Well Structures

October 16, 2008

Author(s)

W Jaskolski, Garnett W. Bryant

The energy levels and excitation spectra of multi-shell nanocrystals composed of ZnS and CdS layers are investigated. The calculations are performed both in the...

Development of the Atomic and Molecular Data Markup Language for Internet Data Exchange

October 16, 2008

Author(s)

Y Ralchenko, R Clark, D Humbert, David R. Schultz, T Kato, Y J. Rhee

Accelerated development of the Internet technologies, including those relevant to the atomic and molecular physics, poses new requirements for the proper...

Fundamental Atomic Xenon Data for EUV Source Modeling

October 16, 2008

Author(s)

John D. Gillaspy

The Ne II Spectrum

October 16, 2008

Author(s)

Alexander Kramida, Gillian Nave

Spectra of neon-filled hollow cathode discharge lamps were observed by means of high-resolution Fourier-transform spectroscopy (FTS) covering the region from...

Measurement Performance of High-Accuracy Low-Pressure Transducers

October 16, 2008

Author(s)

A P. Miiller

A systematic study of measurement performance is described for several different types of transducers including capacitance diaphragm gauges (CDGs), quartz...

New NIST Traceable Standards for Calibration and Validation of Differential Scanning Calorimetry

October 16, 2008

Author(s)

Donald G. Archer

Several reference materials and associated reference value have been recommended for the purposes of calibration and/or validation of differential scanning...

Graphical Evaluation of Certainty of Smokeless PowderPopulation Association Using Computer-Intensive Statistics

October 16, 2008

Author(s)

William MacCrehan, J D. Secl, David L. Duewer

Forensic evidential evaluations often require comparison of questioned and known measurements to determine if they have a common origin. Visual display of this...

Fluid Propeties Simulation Challenge. Recommendations for Problem II(c): 2-Propanol Density

October 16, 2008

Author(s)

L. A. Watts

Recommendations are given for Problem 11(c): 2-propanol density at problem conditions: (1) 0.1 MPa. 298.15 K and (2) 5 MPa, 400 K. The recommendedvalues and...

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