Researcher Nabs Doubly Magic Tin Isotope, A North American First Dec 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. This is one reason nuclear. (Science Daily)
Researchers Demonstrate A Flexible, One-step Assembly Of Nanoscale Structures Jul 30, 2008
The team modeled the elastic instability of the membrane in terms of elastically interacting dislocation dipoles and found complete agreement between the theoretical ground state and the observed pattern. This model allows for the manipulation of the structural details of the membrane to tailor the elastic distortions and generate a variety of nanostructures. (Science Daily)
Photosynthetic Dimmer Switch For Plants Identified May 10, 2008
Fleming and his group found that intense exposure to light triggers the formation of zeaxanthin molecules in Photosystem II. These zeaxanthin molecules interact with excited chlorophyll molecules and dissipate the excess energy via a charge-transfer mechanism - zeaxanthin gives up an electron to the chlorophyll, bringing the chlorophyll s energy back down to its ground state and turning the zeaxanthin into a radical cation which, unlike an excited chlorophyll molecule, is a non-oxidizing agent.... (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)
