36 bromine ← krypton → rubidium Ar ↑ Kr ↓ Xe Periodic Table - Extended Periodic Table
General
Name, Symbol, Number	krypton, Kr, 36
Chemical series	noble gases
Group, Period, Block	18, 4, p
Appearance	colorless
Standard atomic weight	83. Rubidium (ruːˈbɪdiəm /rəˈbɪdiəm/ is a Chemical element with the symbol Rb and Atomic number 37 This article pertains to the chemical element For other uses see Argon (disambiguation. Xenon (ˈzɛnɒn or) is a Chemical element represented by the symbol Xe. This is a typical display of the periodic table of the elements and contains the symbol and Atomic number of each element Wikipedia talkFeatured lists for an explanation of this and other inclusion tags below -->This is a list of Chemical elements, sorted by name Wikipedia talkFeatured lists for an explanation of this and other inclusion tags below -->This is a list of chemical elements by symbol, including the A table of Chemical elements ordered by Atomic number and color coded according to type of element In Chemistry a group, also known as a family, is a vertical column in the Periodic table of the Chemical elements There are 18 groups in History Noble gas is translated from the German noun de ''Edelgas'' first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity In Chemistry a group, also known as a family, is a vertical column in the Periodic table of the Chemical elements There are 18 groups in In the Periodic table of the elements, a period is a horizontal row of the table A block of the Periodic table of elements is a set of adjacent groups The respective highest-energy electrons in each element in a block belong to the same Atomic History Noble gas is translated from the German noun de ''Edelgas'' first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity A period 4 element is one of the Chemical elements in the fourth row (or period) of the periodic table of the elements. See also Electron configuration The atomic mass (ma is the Mass of an atom most often expressed in unified atomic mass units The atomic mass may be considered to be the total mass 798(2)  g·mol−1
Electron configuration	[Ar] 3d10 4s2 4p6
Electrons per shell	2, 8, 18, 8
Physical properties
Phase	gas
Density	(0 °C, 101. In Atomic physics and Quantum chemistry, electron configuration is the arrangement of Electrons in an Atom, Molecule, or other This article pertains to the chemical element For other uses see Argon (disambiguation. The electron is a fundamental Subatomic particle that was identified and assigned the negative charge in 1897 by J An electron shell may be crudely thought of as an Orbit followed by Electrons around an Atom nucleus. In the Physical sciences a phase is a Set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties This page is about the physical properties of gas as a state of matter The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 325 kPa) 3. 749 g/L
Melting point	115. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. 79 K (-157. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic 36 °C, -251. The Celsius Temperature scale was previously known as the centigrade scale. 25 °F)
Boiling point	119. Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid 93 K (-153. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic 22 °C, -244. The Celsius Temperature scale was previously known as the centigrade scale. 12 °F)
Triple point	115. Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 In Thermodynamics, the triple point of a substance is the Temperature and Pressure at which three phases (for example Gas, Liquid 775 K, 73. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic 2 kPa[1]
Critical point	209. In Physical chemistry, Thermodynamics, Chemistry and Condensed matter physics, a critical point, also called a critical state 41 K, 5. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic 50 MPa
Heat of fusion	1. The standard Enthalpy of fusion (symbol \Delta{}H_{fus} also known as the heat of fusion or specific melting heat, is the amount of 64  kJ·mol−1
Heat of vaporization	9. The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material The enthalpy of vaporization, (symbol \Delta{}_{v}H also known as the heat of vaporization or heat of evaporation, is the Energy required 08  kJ·mol−1
Specific heat capacity	(25 °C) 20. The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the Temperature of a unit quantity 786  J·mol−1·K−1
Vapor pressure P(Pa) 1 10 100 1 k 10 k 100 k at T(K) 59 65 74 84 99 120
Atomic properties
Crystal structure	cubic face centered
Oxidation states	4,[2] 2
Electronegativity	3. Vapor pressure (also known as equilibrium vapor pressure or saturation vapor pressure) is the Pressure of a Vapor in equilibrium In Mineralogy and Crystallography, a crystal structure is a unique arrangement of Atoms in a Crystal. In Chemistry, the oxidation state is an indicator of the degree of Oxidation of an Atom in a Chemical compound. " Electronegativity " is the opposite of " Electropositivity," which describes an element's ability to donate electrons 00 (Pauling scale)
Ionization energies (more)	1st:  1350. The ionization potential, ionization energy or EI of an Atom or Molecule is the Energy required to remove an Electron These tables list the Ionization energy in kJ/mol necessary to remove one mole of Electrons from one mole of neutral gaseous Atoms (first energy respectively 8  kJ·mol−1
	2nd:  2350. The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material 4  kJ·mol−1
	3rd:  3565  kJ·mol−1
Atomic radius (calc. )	88  pm
Covalent radius	110  pm
Van der Waals radius	202 pm
Miscellaneous
Magnetic ordering	nonmagnetic
Thermal conductivity	(300 K) 9. The covalent radius, r cov is a measure of the size of Atom which forms part of a Covalent bond. Van der Waals Volume The van der Waals volume, V, also called the atomic volume or molecular volume, is the atomic property most directly In Physics, magnetism is one of the Phenomena by which Materials exert attractive or repulsive Forces on other Materials. In Physics, thermal conductivity, k is the property of a material that indicates its ability to conduct Heat. 43x10-3  W·m−1·K−1
Speed of sound	(gas, 23 °C) 220 m/s
Speed of sound	(liquid) 1120 m/s
CAS registry number	7439-90-9
Selected isotopes
Main article: Isotopes of krypton iso NA half-life DM DE (MeV) DP 78Kr 0. Sound is a vibration that travels through an elastic medium as a Wave. Sound is a vibration that travels through an elastic medium as a Wave. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to There are 31 known isotopes of Krypton ( Kr) Naturally occurring krypton is made of five stable and one slightly radioactive Isotope Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides In Chemistry, natural abundance (NA refers to the abundance Isotopes of a Chemical element as naturally found on a planet Half-Life (computer-game page here It's already listed in the disambiguation page Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. The decay energy is the Energy released by a Nuclear decay. The energy difference of the Reactants is often written as Q: where Q In Nuclear physics, a decay product, also known as a daughter product, daughter isotope or daughter nuclide, is a Nuclide 35% 2. 3×1020 y ε ε - 78Se 79Kr syn 35. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Double electron capture is a Decay mode of Atomic nucleus. For a nuclide ( A, Z) with number of Nucleons A and Atomic Selenium (səˈliniəm is a Chemical element with the Atomic number 34 represented by the chemical symbol Se, an atomic mass of 78 A synthetic radioisotope is a Radionuclide that is not found in nature no natural process or mechanism exists which produces it or it is so unstable that it decays away in 04 h ε - 79Br β+ 0. Electron capture (sometimes called inverse beta decay) is a Decay mode for Isotopes that will occur when there are too many Protons in the Positron emission is a type of Beta decay, sometimes referred to as " beta plus " (&beta+ 604 79Br γ 0. Gamma rays (denoted as &gamma) are a form of Electromagnetic radiation or light emission of frequencies produced by sub-atomic particle interactions 26, 0. 39, 0. 60 - 80Kr 2. 25% 80Kr is stable with 44 neutrons 81Kr syn 2. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. A synthetic radioisotope is a Radionuclide that is not found in nature no natural process or mechanism exists which produces it or it is so unstable that it decays away in 29×105 y ε - 81Br γ 0. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Electron capture (sometimes called inverse beta decay) is a Decay mode for Isotopes that will occur when there are too many Protons in the Gamma rays (denoted as &gamma) are a form of Electromagnetic radiation or light emission of frequencies produced by sub-atomic particle interactions 281 - 82Kr 11. 6% 82Kr is stable with 46 neutrons 83Kr 11. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. 5% 83Kr is stable with 47 neutrons 84Kr 57% 84Kr is stable with 48 neutrons 85Kr syn 10. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. Krypton 85 ( 85Kr) is a Radioisotope of Krypton. It decays into rubidium-85 with a Half-life of 10 A synthetic radioisotope is a Radionuclide that is not found in nature no natural process or mechanism exists which produces it or it is so unstable that it decays away in 756 y β- 0. In Nuclear physics, beta decay is a type of Radioactive decay in which a Beta particle (an Electron or a Positron) is emitted 687 85Rb 86Kr 17. Rubidium (ruːˈbɪdiəm /rəˈbɪdiəm/ is a Chemical element with the symbol Rb and Atomic number 37 3% 86Kr is stable with 50 neutrons
References

Krypton (pronounced /ˈkrɪptən/ or /ˈkrɪptɒn/; from Greek: kryptos "hidden") is a chemical element with the symbol Kr and atomic number 36. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. Recommended values for many properties of the elements together with various references are collected on these data pages Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly A chemical element is a type of Atom that is distinguished by its Atomic number; that is by the number of Protons in its nucleus. See also List of elements by atomic number In Chemistry and Physics, the atomic number (also known as the proton It is a member of Group 18 and Period 4. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquified air, and is often used with other rare gases in fluorescent lamps. History Noble gas is translated from the German noun de ''Edelgas'' first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five A fluorescent lamp or fluorescent tube is a Gas-discharge lamp that uses Electricity to excite mercury Vapor. Krypton is inert for most practical purposes, but it is known to form compounds with fluorine. In English to be inert is to be in a state of doing little or nothing Fluorine, fluorum meaning "to flow" is the Chemical element with the symbol F and Atomic number 9 Krypton can also form clathrates with water when atoms of it are trapped in a lattice of the water molecules. A clathrate or clathrate compound or cage compound is a Chemical substance consisting of a lattice of one type of molecule trapping

Krypton, like the other noble gases, can be used in lighting and photography. History Noble gas is translated from the German noun de ''Edelgas'' first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity Krypton light has a large number of spectral lines, and krypton's high light output in plasmas allows it to play an important role in many high-powered gas lasers, which pick out one of the many spectral lines to amplify. There is also a specific krypton fluoride laser. For background information about krypton and fluorine the two active elements in a krypton fluoride laser see Krypton and Fluorine. The high power and relative ease of operation of krypton discharge tubes caused (from 1960 to 1983), the official meter (metric distance) to be defined in terms of one orange-red spectral line of krypton-86. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International

Physical properties

A krypton filled discharge tube in the shape of the element's atomic symbol.

Krypton is characterized by a brilliant green and orange spectral signature. Green is a Color, the perception of which is evoked by light having a spectrum dominated by energy with a Wavelength of roughly 520–570- nm. The colour orange occurs Spectral signatures are the specific combination of reflected and absorbed Electromagnetic radiation at varying wavelengths which can uniquely identify an object It is one of the products of uranium fission. Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the Nuclear fission is the splitting of the nucleus of an atom into parts (lighter nuclei) often producing Free neutrons and other smaller nuclei which may ^[3] Solidified krypton is white and crystalline with a face-centered cubic crystal structure, which is a common property of all noble gases. A solid' object is in the States of matter characterized by resistance to Deformation and changes of Volume. In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating The cubic crystal system (or isometric) is a Crystal system where the Unit cell is in the shape of a Cube. In Mineralogy and Crystallography, a crystal structure is a unique arrangement of Atoms in a Crystal. The original name of krypton is "Hidden One. " The melting point of krypton is -157. 2 degrees Celsius, and its boiling point is -153. 4 degrees Celsius.

History

Krypton was discovered in Great Britain in 1898 by Sir William Ramsay and Morris Travers in residue left from evaporating nearly all components of liquid air^[4]. Sir William Ramsay (2 October 1852 &ndash 23 July 1916 was a Scottish chemist who discovered the Noble gases and received the Nobel Prize in Morris William Travers (January 24 1872 Kensington London–August 25 1961 Stroud Gloucestershire the founding director of the Indian Institute of Science, was an William Ramsay was awarded the 1904 Nobel Prize in Chemistry for discovery of a series of noble gases, including krypton. The Nobel Prize in Chemistry (Nobelpriset i kemi is awarded annually by the Royal Swedish Academy of Sciences to scientists in the various fields of Chemistry. History Noble gas is translated from the German noun de ''Edelgas'' first used in 1898 by Hugo Erdmann to indicate their extremely low level of reactivity

Metric role

In 1960, an international agreement defined the Meter in terms of wavelength of light emitted by the krypton-86 isotope. In Physics wavelength is the distance between repeating units of a propagating Wave of a given Frequency. This agreement replaced the longstanding standard meter located in Paris, which was a metal bar made of a platinum-iridium alloy (the bar was originally estimated to be one ten-millionth of a quadrant of the earth's polar circumference), and was itself replaced by a definition based on the speed of light — a fundamental physical constant. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International Paris (ˈpærɨs in English; in French) is the Capital of France and the country's largest city Platinum (ˈplætɪnəm is a Chemical element with the Atomic symbol Pt and an Atomic number of 78 Iridium (ɪˈrɪdiəm is a Chemical element that has the symbol Ir and Atomic number 77 EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 In October 1983, the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) defined the meter as the distance that light travels in a vacuum during 1/299,792,458 s. The International Bureau of Weights and Measures ( Bureau international des poids et mesures, in French) is an international Standards organization, one This vacuum means "absence of matter" or "an empty area or space" for the cleaning appliance see Vacuum cleaner. ^[5]

Occurrence

The world has retained all of the noble gases that were present at its formation except for helium. Helium ( He) is a colorless odorless tasteless non-toxic Inert Monatomic Chemical Helium molecules are light and move fast enough to eventually escape the earth's gravity. ^[6] Krypton's concentration in the atmosphere is about 1 ppm. Temperature and layers The temperature of the Earth's atmosphere varies with altitude the mathematical relationship between temperature and altitude varies among five "Parts-per" notation is used especially in Science and Engineering, to denote Ratios (relative proportions in measured quantities particularly It can be extracted from liquid air by fractional distillation. Fractional distillation is the separation of a mixture into its component parts or fractions such as in separating Chemical compounds by their Boiling point by heating ^[7] The amount of krypton in space is uncertain, as is the amount is derived from the meteoritic activity and that from solar winds. The first measurements suggest an overabundance of krypton in space. ^[8]

Compounds

Like the other noble gases, krypton is chemically unreactive. However, following the first successful synthesis of xenon compounds in 1962, synthesis of krypton difluoride was reported in 1963. Xenon (ˈzɛnɒn or) is a Chemical element represented by the symbol Xe. See also Krypton fluoride laser Krypton difluoride, KrF2 was the first compound of Krypton discovered ^[9] There are unverified reports of other fluorides and a salt of a krypton oxoacid. Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants An oxoacid is an Acid which contains Oxygen. More specifically it is an acid which contains oxygen contains at least one other element ArKr+ and KrH+ molecule-ions have been investigated and there is evidence for KrXe or KrXe+. This article pertains to the chemical element For other uses see Argon (disambiguation. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 In Chemistry, a molecule is defined as a sufficiently stable electrically neutral group of at least two Atoms in a definite arrangement held together by An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge Xenon (ˈzɛnɒn or) is a Chemical element represented by the symbol Xe. ^[10]

At the University of Helsinki in Finland, HKrCN and HKrCCH (krypton hydride-cyanide and hydrokryptoacetylene) were synthesized and determined to be stable up to 40K (M. The University of Helsinki (Helsingin yliopisto Helsingfors universitet is a University located in Helsinki, Finland since 1829 but founded The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic Räsänen et al. ). ^[9]

If the kryptonite found in Superman stories followed the naming conventions of chemical compounds, it would be an oxyanion of krypton. Kryptonite is a mineral from the Superman mythos originating in the Superman Radio show series Superman is a fictional Comic book Superhero widely considered to be one of the most recognized of such characters and an American Cultural icon A chemical compound is a substance consisting of two or more different elements chemically bonded together in a fixed proportion by Mass. An oxyanion or oxoanion is a negatively charged Polyatomic ion that contains Oxygen. Krypton cannot form an oxyanion.

Isotopes

Main article: isotopes of krypton

There are 31 known isotopes of krypton. There are 31 known isotopes of Krypton ( Kr) Naturally occurring krypton is made of five stable and one slightly radioactive Isotope ^[11] Naturally occurring krypton is made of five stable and one slightly radioactive isotope. Stable isotopes are chemical isotopes that are not Radioactive (to current knowledge Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides Its spectral signature can be produced with some very sharp lines. ⁸¹Kr, the product of atmospheric reactions is produced with the other naturally occurring isotopes of krypton. Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides Being radioactive it has a half-life of 230,000 years. Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. Half-Life (computer-game page here It's already listed in the disambiguation page Krypton is highly volatile when it is near surface waters but ⁸¹Kr has been used for dating old (50,000 - 800,000 year) groundwater. Groundwater is Water located beneath the Ground surface in Soil pore spaces and in the Fractures of lithologic formations ^[12]

⁸⁵Kr is an inert radioactive noble gas with a half-life of 10. Krypton 85 ( 85Kr) is a Radioisotope of Krypton. It decays into rubidium-85 with a Half-life of 10 76 years. It is produced by the fission of uranium and plutonium, such as in nuclear bomb testing and nuclear reactors. Nuclear fission is the splitting of the nucleus of an atom into parts (lighter nuclei) often producing Free neutrons and other smaller nuclei which may Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the A nuclear weapon is an explosive device that derives its destructive force from Nuclear reactions either fission or a combination of fission and fusion. This article is a subarticle of Nuclear power. A nuclear reactor is a device in which Nuclear chain reactions are initiated controlled ⁸⁵Kr is released during the reprocessing of fuel rods from nuclear reactors. Nuclear fuel is any material that can be consumed to derive Nuclear energy, by analogy to chemical Fuel that is burned to derive energy Concentrations at the North Pole are 30% higher than at the South Pole as most nuclear reactors are in the northern hemisphere. The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is subject to the caveats explained below defined as the point in the northern The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is the southernmost point on the surface of the Earth. ^[13]

Applications

Krypton's multiple emission lines make ionized krypton gas discharges appear whitish, which in turn makes krypton-based bulbs useful in photography as a brilliant white light source. Krypton is thus used in some types of photographic flashes used in high speed photography. Photography (fә'tɒgrәfi or fә'tɑːgrәfi (from Greek φωτο and γραφία is the process and Art of recording pictures by means of capturing Krypton gas is also combined with other gases to make luminous signs that glow with a bright greenish-yellow light. ^[14]

Krypton is mixed with argon as the fill gas of energy saving fluorescent lamps. This article pertains to the chemical element For other uses see Argon (disambiguation. This reduces their operating voltage and power consumption. Unfortunately it also reduces their light output and raises their cost. ^[15] Krypton costs 100 times as much as argon. Krypton (along with Xenon) is also used to fill incandescent lamps to reduce filament evaporation and allow higher operating temperatures to be used for the filament. ^[16] A brighter light results which contains more blue than conventional lamps.

Krypton's white discharge is often used to good effect in coloured gas discharge tubes, which are then simply painted or stained in other ways to allow the desired colour (for example, "neon" type advertising signs where the letters appear in differing colours, are often entirely krypton-based). Neon (ˈniːɒn is the Chemical element that has the symbol Ne and Atomic number 10 Krypton is also capable of much higher light power density than neon in the red spectral line region, and for this reason, red lasers for high power laser light shows are often krypton lasers with mirrors which select out the red spectral line for laser amplification and emission, rather than the more familiar helium-neon variety, which could never practically achieve the multi-watt red laser light outputs needed for this application. ^[17]

Krypton has an important role in production and usage of the krypton fluoride laser. For background information about krypton and fluorine the two active elements in a krypton fluoride laser see Krypton and Fluorine. The laser has been important in the nuclear fusion energy research community in confinement experiments. The laser has high beam uniformity, short wavelength, and the ability to modify the spot size to track an imploding pellet. A laser is a device that emits Light ( Electromagnetic radiation) through a process called Stimulated emission. In Physics wavelength is the distance between repeating units of a propagating Wave of a given Frequency. ^[18]

In experimental particle physics, liquid krypton is used to construct quasi-homogeneous electromagnetic calorimeters. Particle physics is a branch of Physics that studies the elementary constituents of Matter and Radiation, and the interactions between them In Particle physics, a calorimeter is an experimental apparatus that measures the Energy of particles. A notable example is the calorimeter of the NA48 experiment at CERN containing about 27 tons of liquid krypton. NA48 is a series of Particle physics experiments in the field of Kaon physics being carried out at the North Area of the SPS accelerator at The European Organization for Nuclear Research (Organisation Européenne pour la Recherche Nucléaire known as CERN This usage is rare, since the cheaper liquid argon is typically used. This article pertains to the chemical element For other uses see Argon (disambiguation. The advantage of krypton over argon is a small Molière radius of 4. The Molière radius is a characteristic constant of a material giving the scale of the transverse dimension of the fully contained electromagnetic showers initiated by an incident 7cm, which allows for excellent spatial resolution and low degree of overlapping. The other parameters relevant for calorimetry application are: radiation length of X₀ = 4. In physics the radiation length is a characteristic of a material related to the energy loss of high energy electromagnetic-interacting particles with it 7cm, density of 2. 4g/cm³.

The sealed spark gap assemblies contained in ignition excitors used in some older Turbine/Jet engines contain a very small amount of Krypton 85 in order to obtain consistent ionization levels and uniform operation. The amount of radiation from the average gap is approximatley the same as that of a radium-dialed wrist watch but should be handled carefully.

References

Further reading

• Los Alamos National Laboratory - Krypton
• "Chemical Elements: From Carbon to Krypton" By: David Newton & Lawrence W. Baker
• "Krypton 85: a Review of the Literature and an Analysis of Radiation Hazards" By: William P. Kirk

External links

• WebElements.com – Krypton
• Krypton Fluoride Lasers
• Computational Chemistry Wiki