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Journals

Development of a Small and Portable Absolute Gravimeter

October 12, 2021

Author(s)

A L. Vitouchkine, J E. Faller

lhgh precision (10 -9-10 -8)g absolute ballistic gravimeters (ABGs) are now being used worldwide. The ballistic method is based on the measurement of time and...

Colloquium: Femtosecond Optical Frequency Combs

October 12, 2021

Author(s)

S T. Cundiff, Jun Ye

Recently there has been a remarkable synergy between the technology of precision laser stabilization and modelocked ultrafast lasers. This has resulted in...

The NIST FT 700 Vacuum Ultraviolet Fourier Transform Spectrometer: Applications in Ultraviolt Spectrometry and Radiometry

October 12, 2021

Author(s)

Ulf Griesmann, R Kling, John H. Burnett, L Bratasz

In the minds of many, Fourier transform spectrometry is restricted to applications in the infrared. In the ultraviolet, the increasingly severe demands on...

Control of the Frequency Comb From a Mode-Locked Erbium Doped Fiber Laser

October 12, 2021

Author(s)

J Rauschenberger, T M. Fortier, D J. Jones, Jun Ye, Steven T. Cundiff

We show that a stretched-pulse mode-locked fiber laser produces a well-defined frequency comb, providing a compact source of frequency combs and allowing comb...

Final Report of the SIM ⁶⁰ Co Air-Kerma Comparison (KCDB Entry SIM.RI (I)-K1)

October 12, 2021

Author(s)

C K. Ross, K Shortt, M Saravi, A Meghzifene, V M. Tovar, R A. Barbosa, C N. da Silva, F Gutt, Stephen M. Seltzer

Transfer chambers were used to compare the standards for 60Co air kerma maintained by seven laboratories. Six of the laboratories were members of the Sistema...

Measurement of Nonlinear Phase Generated in Air-Silica Microstructure Fiber

October 12, 2021

Author(s)

T M. Fortier, Jun Ye, Steven T. Cundiff, R S. Windler

We present measurementsof the nonlinear phase noise generated in air-silica microstructure fiber, which is used in carrier envelope phase stabilization schemes...

Stability of Precision Diamond Turning Processes That Use Round Nosed Tools

October 12, 2021

Author(s)

David E. Gilsinn, Matthew A. Davies, B Balachandran

A system of retarded differential equations model is developed for a diamond-turning process with chip area cut by a round nosed tool. The results are presented...

Traceability, Accreditation, Measurement Accuracy: How to Get It and How to Keep It!

October 12, 2021

Author(s)

C S. Brickenkamp, E L. Garner

Many of us in the scientific and technological arenas are measurement middlemen taking measurements provided by others, and making measurements for others. This...

Nonperturbative Transient Four-Wave-Mixing Lineshapes Due to Excitation induced Shift and Excitation Induced Dephasing

October 12, 2021

Author(s)

J M. Shacklette, Steven T. Cundiff

We numerically calculate the transient-four-wave-mixing (TFWM) response in systems that exhibit either aresonance'frequency or a dephasing rate that depends on...

Analysis of High-Resolution Infrared and CARS Spectra of ³²S¹⁸O^d3

October 12, 2021

Author(s)

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

Modeling the Radiative Properties of Silicon With Thin-Film Coatings and the Experimental Validation

October 12, 2021

Author(s)

B J. Lee, Z M. Zhang, E A. Early, D P. DeWitt

A critical issue for rapid thermal processing (RTP), a single wafer integrated circuit manufacturing process, is how to reduce the temperature measurement...

Absorption Spectroscopy of EBT Model GAFCHROMIC TM Film

October 12, 2021

Author(s)

Slobodan Devic, Tomic Nada, Zhiyu Pang, Jan Seuntjens, Ervin Podgorsak, C K. Ross, Norman V. Klassen, Christopher G. Soares

The introduction of radiochromic films has solved some of the problems associated with conventional 2D radiation detectors. Their high spatial resolution, low...

Development of an Emergency Procedures Manual Database (REPMD)

October 12, 2021

Author(s)

J J. La Rosa, P Motabar, Kenneth G. Inn, H Ziegler

A Radioanalytical Emergency Procedures Manual Database (REPMD) is currently under development at NIST. Its main objective is to act as a valuable reference and...

Ultrafast Spin Phenomena in Highly Excited N-Doped GaAs

October 12, 2021

Author(s)

R Bratschitsch, Z Chen, Steven T. Cundiff

We perform time-resolved Faraday rotation exeriments on undoped and n-doped GaAs samples at high optical excitation densities. The Faraday rotation signal...

Direct Optical Measurement of the Dither Amplitude of a Near-Field Microscope Aperture on a Nanometer

October 12, 2021

Author(s)

B Dragnea, J Szarko, J Preusser, S R. Leone

A new confocal optical method for measuring the dithering amplitude of an aperture near-field optical microscope tip is presented. The methodis direct and...

Efficient Computation of Optical Forces With the Coupled Dipole Method

October 12, 2021

Author(s)

P C. Chaumet, Adel Rahmani, A Sentenac, Garnett W. Bryant

We present computational techniques to compute in an efficient way optical forces on arbitrary nanoobjects using the coupled dipole method. We show how the time...

Microwave-Based Structure and Four-Simensional Morphed Intermolecular Potential for HI-CO₂

October 12, 2021

Author(s)

Wolfgang Jabs, Fabrice Willaert, Blake McElmurry, Luis Rivera-Rivera, Raffaele Montuoro, R R. Lucchese, J W. Bevan, R D. Suenram

Microwave spectra of the four isotopomers, HI-12C16O2, HI-12C18O2, HI-12C18O16O, and HI-12C16O18O have been recorded using pulsed-nozzle Fourier-transform...

Radiative Properties of Blackbody Calibration Sources: Recent Advances in Computer Modeling

October 12, 2021

Author(s)

A Prokhorov, Sergey Mekhontsev, Leonard Hanssen

The radiative characteristics (spectral effective emissivity, spectral radiance, and radiance temperature) of blackbody calibration sources widely used in...

Analysis of the Free Ion Nd³⁺ Spectrum (Nd IV)

October 12, 2021

Author(s)

J-F Wyart, Ali Meftah, Wan-U Lydia Tchang-Brillet, Norbert Champion, O Lamrous, Nissan Spector, J Sugar

Recent breakthrough in the analysis of Nd IV resulted in the establishment of 37 energy levels of the ground configuration 4f^3. We report here the completion...

Background-Free Measurements of Coherent Photoionization by Wavelength-Dependent Femtosecond Probing of a Single Rotational Quantum Beat in the E¹Σ_g⁺ State of Li₂

October 12, 2021

Author(s)

R Uberna, Z Amitay, C X. Qian, S R. Leone

The relative coherent ionization yield of lithium dimer is measured quantitatively in a two-color pump-probe femtosecond experiment usingpump pulses around 800...

Mobilities of aromatic ions drifting in helium

October 12, 2021

Author(s)

M Krishnamurthy, J A. de Gouw, V M. Bierbaum, S R. Leone

Benzene dimer cations (C 12H 12+and C 12H 11+) are produced in the flow tube section of a selected-ion flow-drift tube (SIFDT) apparatus. The reduced mobilities...

First-Principles Calculations of Structural, Electronic, Vibrational and Magnetic Properties of C₆₀ and C ₄₈ N₁₂: a Comparative Study

October 12, 2021

Author(s)

R H. Xie, Garnett W. Bryant, L Jensen, J Zhao, J H. Smith

We perform first-principles calculations of the structural, electronic, vibrational and magnetic properties of C 48 N 12 azafullerene and C 60. Full geometrical...

Electron Impact Total Ionization Cross Sections of CF₄, C₂F^6^ and C₃F^8^

October 12, 2021

Author(s)

H Nishimura, W M. Huo, Yong Sik Kim, M A. Ali

Both theoretical and experimental electron-impact total ionization cross sections of CF 4, C 2F 6 and C 3F 8 are presented. The experimental cross sections have...

Cross Sections for Ionization of Mo and Mo+ by Electron Impact

October 12, 2021

Author(s)

D H. Kwon, Y J. Rhee, Yong Sik Kim

Theoretical cross sections for electron-impact ionization of the neutral Mo Atom and Mo+ ion are reported. Both Mo and Mo+ have many metastable levels near the...

Molecular Production in Two Component Atomic Fermi Gases

October 12, 2021

Author(s)

J Chwedenczuk, K Goral, T K hler, Paul S. Julienne

We provide a practical approach to the molecular production via linear downward sweeps of Feshbach resonances in degenerate Fermi gases containing incoherent...

Exciton-Plasmon Interaction and Hybrid Excitons in Semiconductor-Metal Nanoparticle Assemblies

October 12, 2021

Author(s)

A O. Govorov, Garnett W. Bryant, Wei Zhang, T Skieni, J Lee, N A. Kotov, Joseph M. Slocik, Rajesh R. Naik

We describe physical properties of excitons in hybrid complexes composed of semiconductor and metal nanoparticles. The interaction between individual...

Thomas-Fermi approximation for double condensates

October 12, 2021

Author(s)

B D. Esry, C H. Greene, J P. Burke, J L. Bohn

We present calculations of the Thomas-Fermi wave functions for two simultaneously trapped and condensed hyperfire states of 87rb which has recently observed [C...

CO(v) Produced From CH₃ or CD₃ + O

October 12, 2021

Author(s)

T P. Marcy, R R. Diaz, Dwayne E. Heard, S R. Leone, L B. Harding, S J. Klippenstein

Combined experimental and theoretical investigations of the title reactions are presented. Time-resolved Fourier transform infrared (FTIR) emission studies of...

Density Functional Study of Onion-Skin-Like [As@Ni_12As_20]^3- and [Sb@Pd_12Sb_20]^3- Cluster Ions

October 12, 2021

Author(s)

J Zhao, Rui-Hua Xie

A comprehensive study of the structural and electronic properties of the interesting onion-skin-like [As@Ni_12As_20]^3- cluster ion, characterized by Moses et...

Ionization of W and W+ by Electron Impact

October 12, 2021

Author(s)

D H. Kwon, Y J. Rhee, Yong Sik Kim

Theoretical cross sections for electron-impact ionization of the neutral W atom and W$^+$ ion are reported. The direct ionization cross sections were calculated...

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