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Spectroscopy News
Raman Spectroscopy Helps to Decrease Engine Emissions
NASHVILLE, Tenn. -- NASHVILLE, Tenn. -- Engineers at Vanderbilt University are using Raman spectroscopy to analyze combustion in direct injection gasoline engines -- research that could lead to decreased pollution. Direct injection engines differ from conventional spark ignition engines in that they draw fuel into the cylinder late in the compression stroke, making them run more efficiently. But they do not burn the gasoline as completely as conventional engines, so they produce more pollution. Determin...
IR Reveals Evidence of Galactic Collisions
Apr 29, 1999 — COLUMBUS, Ohio, April 29 -- Astronomers from Ohio State University used infrared telescopes to discover that collisions and near-collisions between spiral galaxies are more common than had been suspected. Professor Jay Frogel and Paul Eskridge, a...
Passive IR Spectroscopy Monitors Volcanic Gases
Apr 1, 1999 — One of the most a ctive volcanoes in the world could provide researchers with important insights into processes deep within the Earth and lead to more accurate forecasts of eruptions. The problem with studying volcanic gases is the need for direct...
Phased out by Coherent Control
Mar 1, 1999 — A "textbook" laboratory demonstration of a basic quantum physical principle could lay the groundwork for practical applications in photochemistry, forensics, quantitative analysis and quantum computing. Using ultrafast optical techniques,...
Spectrometer Made Smaller, Less Expensive
Mar 1, 1999 — Scientists at the University of Ulm in collaboration with LaserSpec Analytik GmbH have unveiled an atomic absorption spectrometer that uses a laser diode as a light source and a tungsten coil to atomize samples -- advances that could lead to...
Volcanic Gas Measured at a Safe Distance
Mar 1, 1999 — Volcanic gases offer important clues to atmospheric and subsurface processes, but methods that have proved safe have not proved easy. Scientists using ground-based IR remote-sensing techniques to analyze volcanic plume gases must often contrive...
Team Builds More Efficient Quantum Cascade Laser
Feb 1, 1999 — From chemical spectroscopy to free-space optical communications, a growing number of applications can benefit from lasers emitting in the IR between 8 and 12 µm. In recent years, many have looked closely at quantum cascade laser technology for...
Two Associations Recognize Raman's Discovery
Feb 1, 1999 — One of the most popular methods for detecting illegal drugs and unknown substances is Raman spectroscopy. The technique takes advantage of the Raman effect, named after C.V. Raman of Calcutta, India, a professor at Calcutta University who theorized...
Imaging Spectrometer Improves Auroral Understanding
Jan 1, 1999 — Researchers at the University of Illinois are taking a fresh look at auroras. They have developed an imaging spectrometer that allows them to study auroral emissions as a function of altitude, offering them more clues about the effects of the solar...
Researchers Report Findings on Trapping and Cooling Molecules
Jan 1, 1999 — Researchers have long been interested in the ability to trap and cool molecules to facilitate improvements in ultracold molecular physics and in molecular spectroscopy. Scientists use methods such as laser cooling and cryogenic surface...
Tunable Diode Lasers Stand Up to Research and Commercial Applications
Jan 1, 1999 — Tunable external-cavity diode lasers have become more reliable since their introduction five years ago. Now, more demanding telecommunications, spectroscopy and metrology applications are driving improvements in specifications for the next...
Instruments Market Is Projected to Reach $170 Million by 2003
Dec 1, 1998 — As spectroscopy moves out of the scientific laboratory and onto the manufacturing floor, analysts predict the overall instruments market will continue to grow -- at an average annual rate of 4.1 percent during the next five years. The projection...
Sensor Detects Single Photons
Dec 1, 1998 — A new detector, developed at Stanford University, has the sensitivity to measure the location, arrival time and energy of individual photons in the UV to IR wavelength ranges. The Stanford device is based on superconducting transition-edge detecting...
Photoassociation Makes Cold Cs2 Molecules
Nov 1, 1998 — Physicists at the Centre National de la Recherche Scientifique south of Paris have taken Bose-Einstein condensate research another step forward by using a new method of associating pairs of supercold atoms to form a supercold molecule. Instead of...
Device Detects Particles in Gas Flow
Oct 1, 1998 — The combination of a laser and time-of-flight mass spectrometry promises to enable semiconductor manufacturers to measure the size and type of individual particles in a vacuum chamber during the manufacturing process. Researchers at Lucent...
Integrated Components Trim NASA Budgets
Oct 1, 1998 — Space exploration at the beginning of the next century will balance tight budgetary constraints against the need to understand our planetary environment. New technologies introduced in NASA's New Millennium program are designed to ensure that more...
Process Analytical Instrumentation Markets Continue Growth
Oct 1, 1998 — According to a recent report compiled by Frost & Sullivan of Mountain View, Calif., the market for process analytical instrumentation will continue to grow at a moderate pace between 1998 and 2004. The company found that the spectrometer segment...
Conoscopy Assesses Displays
Sep 1, 1998 — Liquid crystal displays are gaining market share. As prices fall, users want brightness and viewing angles comparable to that of conventional displays. A display's visual performance usually is measured with goniometric methods based on mechanical...
Laser Tweezers Take a Step Forward
Aug 1, 1998 — Imagine the neuroscientist who, surrounded by banks of equipment, is able to take a pair of tweezers and reach inside a cell to manipulate a tiny organelle or extract a virus. Such is the vision of Japanese researcher Katsuhiro Ajito, who recently...
Researchers Unveil New Technique for Imaging Cells
Aug 1, 1998 — An international team of scientists has refined a method for imaging the chemical components of living cells. Working in collaboration with the National Synchrotron Light Source at Brookhaven National Laboratory in Upton, N.Y., the researchers shone...
Tunable Spectrometer Examines Microsamples
Aug 1, 1998 — As a geologist, George Rossman often examined crystals to determine their purity. Commercially available spectrometers were able to characterize the absorption spectra of large samples, but for samples measuring between 5 and 12 µm, no device...
Physicists Propose Novel Method to Catch Neutrinos
Jul 1, 1998 — For years, scientists have sought the elusive, weightless particles known as neutrinos. Neutrinos, which behave somewhat like photons (they can travel without changing direction through matter), are weakly interacting particles and so can travel...
Fluorescence Spectroscopy Measures Pollution in Boston Harbor
Jun 1, 1998 — Scientists have a new tool to measure the pollution in Boston Harbor. Researchers at the Massachusetts Institute of Technology in Cambridge, Mass., have developed a portable, fiber optic spectrofluorometer that detects harmful organic compounds. In...
Scientists Evaluate Statues, Cathedrals with Laser Radar
Jun 1, 1998 — A research group here has collaborated with an Italian team to evaluate the integrity of ancient monuments and historical structures using laser radar that was originally designed for atmospheric sensing. The problem of decaying artifacts is nothing...
Quantum Mechanical Transistor Promises Photonic Applications
Apr 1, 1998 — Scientists at Sandia National Laboratories in Albuquerque, N.M., have developed a quantum mechanical transistor that may increase the accuracy of optical detectors and energy spectrometers. The transistor takes advantage of a phenomenon described in...
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June 2024
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