Publications

Displaying 1 - 5 of 5

Certification of NIST Gas Mixture Standard Reference Materials

February 10, 2022

Author(s)

Christina Cecelski, Kimberly Harris, Cassie Goodman, William A. Kimes, Philip Liu, Walter R. Miller Jr., Jennifer Carney

The Gas Sensing Metrology Group at NIST provides accurate, stable gaseous standards for use in various types of emissions testing and environmental monitoring. The group develops and maintains the highest level of primary gas standards, which provide

High-accuracy 12 C 16 O 2 line intensities in the 2 micron wavelength region measured by frequency-stabilized cavity ring-down spectroscopy

December 13, 2017

Author(s)

Hongming Yi, Philip Liu, Adam Fleisher, Joseph T. Hodges

Reported here are highly accurate, experimentally measured ro-vibrational transition frequencies for the 12C 16O 2 (20012)

Optical Measurement of Radiocarbon Below Unity Fraction Modern by Linear Absorption Spectroscopy

September 7, 2017

Author(s)

Adam J. Fleisher, David A. Long, Qingnan Liu, Lyn Gameson, Joseph T. Hodges

High-precision measurements of radiocarbon (14C) near or below a fraction modern 14C of one (F14C ≤ 1) are costly, requiring the shipment of samples to accelerator mass spectrometer (AMS) facilities that specialize in reporting rare isotope relative

A variable-temperature cavity ring-down spectrometer with application to line shape analysis of CO2 spectra in the 1600 nm region

March 31, 2017

Author(s)

Melanie C. Ghysels, Philip Liu, Adam Fleisher, Joseph T. Hodges

We present a new cavity ring-down spectroscopy system which was developed for variable-temperature absorption measurements (220 K- 290 K) of atmospheric gases. This laser spectrometer was developed in the framework of the NASA Orbiting Carbon Observatory-2

Precision Interferometric Measurement of Mirror Birefringence in High-Finesse Optical Resonators

January 19, 2016

Author(s)

Adam J. Fleisher, David A. Long, Qingnan Liu, Joseph T. Hodges

High-finesse optical resonators found in ultrasensitive laser spectrometers utilize supermirrors ideally consisting of isotropic high-reflectivity coatings with power reflectivity $R\geq99.99\%$. Strictly speaking, however, the optical coatings are often

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