Search results
Results from the WOW.Com Content Network
This MCA was called a “Kicksorter” and boasted excellent linearity and 100 channels. Goulding later worked at the Lawrence Berkeley Lab (1959) and brought some of the early nuclear counting technology to Berkeley and Livermore Labs. Through later years several advances in MCAs have been impressive with 16K channel analyzers being common.
Toshiba TLCS-12, a microprocessor developed for the Ford EEC (Electronic Engine Control) system in 1973. [ 11 ] Intel 8080 CPU launched in 1974 was manufactured using this process.
An HID connected to a gas chromatograph (GC) has the great advantage to use helium as both the carrier gas and the ionization gas. An HID is an ion detector which uses a radioactive source, typically β-emitters, to create metastable helium species. [1] The radioactive source ionizes helium atoms by bombarding them with emissions.
Eluants from the GC column, flowing counter to the flow of helium from the discharge zone, are ionized by photons from the helium discharge. Bias electrode(s) focus the resulting electrons toward the collector electrode , where they cause changes in the standing current which are quantified as the detector output.
Though all heavier helium isotopes decay with a half-life of <1 second, particle accelerator collisions have been used, to create unusual nuclei of elements such as helium, lithium, and nitrogen. The unusual nuclear structures of such isotopes may offer insights into the isolated properties of neutrons and physics beyond the Standard Model .
The method has a sensitivity of 10 −12 Pa·m 3 ·s −1. Similar to the classical Helium charged sniffer test the test sample is enclosed in a bag, but in contrast to the classic method, the bag is exposed with a helium-free gas, so that the helium concentration inside the bag can reduced from 5·10 −7 to 10 −12 Pa·m 3 ·s −1.
Values from CRC are ionization energies given in the unit eV; other values are molar ionization energies given in the unit kJ/mol.The first of these quantities is used in atomic physics, the second in chemistry, but both refer to the same basic property of the element.
Examples include carbon-14, nitrogen-15, and oxygen-16 in the table above. Isobars are nuclides with the same number of nucleons (i.e. mass number) but different numbers of protons and neutrons. Isobars neighbor each other diagonally from lower-left to upper-right. Examples include carbon-14, nitrogen-14, and oxygen-14 in the table above.