How Fireworks Produce Sounds and Co... Jul 4, 2009
After a short time the electrons jump back down to the lowest energy level, which scientists call the ground state ... The color of the light depends on the exact amount of energy released when the electron jumps to the ground state. (Suite101.com)
Optical Computer Closer: Optical Transistor Made From Single Molecule Jul 4, 2009
For this, they have made use of the fact that a molecule s energy is quantized: when laser light strikes a molecule that is in its ground state, the light is absorbed. As a result, the laser beam is quenched. (Science Daily)
Chemists Discover Rare Rydberg Molecule With 'New' Type Of Bonding May 13, 2009
Shaffer says a weak bond forms when an electron far from the nucleus and another ground state (normal) atom interact. The electron is slightly attracted to the ground state atom and vice versa ... The electron pulls the ground state atom back toward the Rydberg atom just enough so it does not escape. (Science Daily)
New Clues To How Stem Cells Form Apr 18, 2009
The process by which these two differentiated cells return to a developmental ground state in the zygote the ultimate stem cell is little understood. An amazing phenotype. (Science Daily)
Unexpected Behavior Of Quantum Dots When Combining To Form Molecules Apr 5, 2009
The experiments, conducted by the staff of the Naval Research Laboratory in Washington, have proved that quantum dots that use holes (electrons with a positive charge and a larger mass) instead of electrons (which have a negative charge) achieve an antibonding molecular ground state, in contrast to natural atoms, which need an extra supply of energy to achieve this state ... Doty et al. Antibonding Ground States in InAs Quantum-Dot Molecules. (Science Daily)
Mass Measurement Technique Uncovers New Iron Isomer Mar 25, 2008
24, 2008) A ground state atomic nucleus can be something of a black box, masking subtle details about its structure behind the aggregate interplay of its protons and neutrons ... When voltage is applied across a tube filled with neon gas, the electrons orbiting the neon nuclei briefly are excited to higher energy levels before they come crashing back down to their ground states, releasing visible light. (Science Daily)
Solar cell directly splits water for hydrogen Feb 18, 2008
"The question is how to get the electrons to stay in the proper path and not, for example, release their energy and go down to ground state without doing any work.". The distance between molecules is important in controlling the rate of electron transfer and getting the electrons where they need to go. (EurekAlert!)
Doppler Tim's Glow Tube Feb 8, 2008
Excess energy is shed by emitting a photon of light, allowing molecules to go from their excited state back to a ground state. The photon of light has a wavelength corresponding to the energy difference between the excited state and the ground state. (WKRC.com, OH)
Materials' Crystal Properties Illuminated By Mathematical 'Lighthouse' Jan 18, 2008
When a substance is cooled to nearly absolute zero, and it can take on an enormously large number of possible "ground states" -- the term for the molecular arrangement with the lowest possible energy. Scientists seek to determine the true ground state because it provides a fundamental understanding of matter in the solid state and its possible uses ... However, determining which molecular pattern is the true ground state requires mathematical proof that is hard to come by. (Science Daily)
Single Spinning Nuclei In Diamond Offer A Stable Quantum Computing Building Block Jun 2, 2007
"How do you control something that can't interact with anything""You do it gingerly and indirectly, the Harvard physicists report in Science. They found that nuclear spins associated with single atoms of carbon-13 -- which make up some 1.1 percent of natural diamond -- can be manipulated via a nearby single electron whose own spin can be controlled with optical and microwave radiation. The excitation of an electron by focusing laser light on a nitrogen vacancy center, a stable defect in a... (Science Daily)
Researchers move closer to switching nuclear isomer decay on and off Apr 6, 2007
The arrangement with the lowest energy is called the ground state and all others are called excited states ... Excited nuclear states eventually decay to the ground state via gamma emission or to another nucleus via particle emission ... However, before these exotic studies can be performed, an accurate determination of the isomers excitation energy above the ground state is needed. (EurekAlert!)
Light-emitting Diodes For Night-vision Displays Jan 25, 2007
When the dye molecules return to their ground state, energy is released in the form of light ... Phosphorescent dyes emit light for a longer period of time, because they are trapped in their excited state and cannot return to their ground state as easily. (Science Daily)
