Results 211 to 220 of about 116,243 (264)
Some of the next articles are maybe not open access.
Physics World, 2010
In drawing attention to the current scarcity of helium-3, William Halperin's Forum article "No lightweight matter" (July p17) took me back 60 years.
openaire +1 more source
In drawing attention to the current scarcity of helium-3, William Halperin's Forum article "No lightweight matter" (July p17) took me back 60 years.
openaire +1 more source
Nature Chemistry, 2012
Owing to peculiar properties, helium has taken both the main and supporting roles in scientific discoveries over the years. Christine Herman explores just what makes it such a cool element.
openaire +2 more sources
Owing to peculiar properties, helium has taken both the main and supporting roles in scientific discoveries over the years. Christine Herman explores just what makes it such a cool element.
openaire +2 more sources
Science, 1979
Helium appears indispensable for certain energy-related uses that may be important 50 years from now, when helium-bearing natural gas, a much cheaper source than air, may be exhausted. Present demand, however, is lower than productive capacity, and much helium is being dissipated into the atmosphere as natural gas is burned for fuel.
openaire +2 more sources
Helium appears indispensable for certain energy-related uses that may be important 50 years from now, when helium-bearing natural gas, a much cheaper source than air, may be exhausted. Present demand, however, is lower than productive capacity, and much helium is being dissipated into the atmosphere as natural gas is burned for fuel.
openaire +2 more sources
Electron capture into excited states of helium by helium-ion impact on helium
Physical Review A, 1975Cross sections for electron capture into each excited state of He up to 4 $sup 1$,$sup 3$D by He$sup +$ impact on He in the energy range 100--10 000 keV have been calculated by means of the first Born approximation (Bates's version). A Gaussian technique previously developed for evaluating two-center integrals occurring in the Born amplitude has been ...
Thomas G. Winter, Chun C. Lin
openaire +1 more source
Physical Review, 1946
A helium cryostat which is cooled by the isentropic expansion of helium without the aid of liquid air or other refrigerant provides a cold chamber for experiments at any temperature down to 2°K. Any gas can be liquefied and delivered to external receivers as desired. Three expansion devices are described. One is a diaphragm engine having a mechanically
openaire +2 more sources
A helium cryostat which is cooled by the isentropic expansion of helium without the aid of liquid air or other refrigerant provides a cold chamber for experiments at any temperature down to 2°K. Any gas can be liquefied and delivered to external receivers as desired. Three expansion devices are described. One is a diaphragm engine having a mechanically
openaire +2 more sources
ACM SIGGRAPH 2005 Electronic Art and Animation Catalog, 2005
Adam Janeczek +2 more
openaire +1 more source
Adam Janeczek +2 more
openaire +1 more source
Scattering of helium atoms by liquid helium
Physical Review B, 1986, Goodman, , Garcia
openaire +2 more sources
Molybdenum‐helium and helium‐helium interaction potentials from helium desorption experiments
physica status solidi (b), 1978W. F. W. M. van Heugten +2 more
openaire +1 more source
NONLOCALITY IN (HELIUM-HELIUM) INTERATOMIC POTENTIALS
1976Publisher Summary This chapter highlights the nonlocality in interactomic potentials. Interatomic potentials are usually taken to be purely local. With this assumption, the potential is obtained through the use of Born–Oppenheimer approximation. This usually leads to a long range attractive van der Waals' potential and a short range steep repulsion ...
openaire +1 more source
Viscosity of Helium I and Helium II
Nature, 1935DETERMINATIONS have recently been made in the Cryogenic Laboratory at Toronto of the viscosity of liquid helium in its two states, helium I and helium II.
openaire +1 more source