Pomeranchukn.

Brit.

/ˌpɒməˈrantʃᵿk/, U.S.

/ˌpɑməˈræntʃək/

Origin: From a proper name. Etymon: proper name Pomerančuk.

Etymology: < the name of Isaak Jakovlevič Pomerančuk (1913–66; also transliterated Pomeranchuk), Russian physicist.

Physics.

1. attributive. Designating or relating to a cooling effect observed in certain systems, esp. a mixture of liquid and solid helium-3, when they are solidified by compression, and which occurs because the entropy of the solid is greater than that of the liquid.Described by Pomeranchuk in Žurnal. eksper. i teoret. fiziki 20 (1950) 919.

ΘΚΠ

the world > matter > physics > mechanics > fluid mechanics > [noun] > compression > specific method or effect

Pomeranchuk1958

1958 Chem. Abstr. 52 17841 (heading) Theory of the Pomeranchuk effect in helium-3.

1971 McGraw-Hill Yearbk. Sci. & Technol. 86/2 First proposed in 1950, the Pomeranchuk method is based on the unusual thermodynamic properties of a solid-liquid mixture of He³ at low temperatures.

1974 Nature 6 Dec. 441/3 Compressional solidification of ³He, known as Pomeranchuk cooling,..restricts experiments to the solidification pressure of 34 atmospheres.

1976 Nature 23 Sept. 276/1 A pair of Pomeranchuk cells was used both for cooling the ³He into the superfluid A-phase and also for inducing a flow of liquid through the narrow tube which connected them together.

2005 Cryogenics 45 331/1 Recently we have shown that YbInCu₄ and related compounds also present a solid state Pomeranchuk effect.

2. Chiefly attributive. Designating various concepts relating to the scattering of subatomic particles at high energies.

a. Pomeranchuk theorem n. (also Pomeranchuk's theorem) a theorem according to which the reaction cross-sections for a particle and for its antiparticle incident on the same target particle should approach the same constant value as the energy of the incident particle is increased.Proposed by Pomeranchuk in Zh. éksper. i teoret. Fiziki 34(1958) 725.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory > theorem

Pomeranchuk theorem1961

1961 Physical Rev. 124 2049/2 We shall present..a rigorous generalization of Pomeranchuk's theorem.

1973 Physics Bull. Mar. 183/2 There is some doubt about the validity of the Pomeranchuk theorem on the constancy of cross sections for K⁺, K⁻ production.

1985 Nucl. Physics B. 254 697 The Pomeranchuk theorem on particle antiparticle cross-section ratios.

1991 Physics Rep. 203 236 We refer the reader to..examples of bounds on particle—antiparticle total cross-section differences (the approach to Pomeranchuk's theorem).

b. Pomeranchuk pole n. a kind of Regge pole with even signature, occurring at an angular momentum value of 1 when there is no momentum transferred between the interacting particles, which has zero isospin, charge, hypercharge, and baryon number, and which is regarded as representing a virtual particle (a pomeron) exchanged during the interaction.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory

Pomeranchuk pole1962

Pomeranchuk trajectory1962

Pomeranchukon1963

pomeron1963

Pomeranchon1964

1962 Nuovo Cimento 25 735 We are assuming either that the coupling constant of the ρ Regge pole is much smaller than that of the Pomeranchuk (vacuum) pole, or that their trajectories lie close together.

1973 M. Leon Particle Physics xii. 244 Elastic scattering..is supposed to be dominated by the Pomeranchuk pole.

1982 Physics Lett. B. 117 247 The Pomeranchuk pole arising due to multiple production of low-pi hadrons.

1988 Annalen der Physik 45 362 The results have been compared with the predictions of the Pomeranchuk Pole exchange model.

c. Pomeranchuk trajectory n. the trajectory traced in the angular momentum plane by a Pomeranchuk pole as the momentum transferred in the interaction increases.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory

Pomeranchuk pole1962

Pomeranchuk trajectory1962

Pomeranchukon1963

pomeron1963

Pomeranchon1964

1962 Physics Lett. 1 226 (title) Determination of the slope of the Pomeranchuk-trajectory from high energy elastic scattering.

1976 N. W. Dean Introd. Strong Interactions xvi. 303 The f (1270) and the f′ (1514) mesons have the correct quantum numbers, but there is considerable question whether either of them actually belongs to the Pomeranchuk trajectory.

1996 Nucl. Physics B. 47 771 Elastic scattering in the forward direction..is described by the exchange of the Pomeranchuk trajectory with the vacuum quantum numbers.

This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).

单词	pomeranchuk
释义	Pomeranchukn. Brit. /ˌpɒməˈrantʃᵿk/, U.S. /ˌpɑməˈræntʃək/ Origin: From a proper name. Etymon: proper name Pomerančuk. Etymology: < the name of Isaak Jakovlevič Pomerančuk (1913–66; also transliterated Pomeranchuk), Russian physicist. Physics. 1. attributive. Designating or relating to a cooling effect observed in certain systems, esp. a mixture of liquid and solid helium-3, when they are solidified by compression, and which occurs because the entropy of the solid is greater than that of the liquid.Described by Pomeranchuk in Žurnal. eksper. i teoret. fiziki 20 (1950) 919. ΘΚΠ the world > matter > physics > mechanics > fluid mechanics > [noun] > compression > specific method or effect Pomeranchuk1958 1958 Chem. Abstr. 52 17841 (heading) Theory of the Pomeranchuk effect in helium-3. 1971 McGraw-Hill Yearbk. Sci. & Technol. 86/2 First proposed in 1950, the Pomeranchuk method is based on the unusual thermodynamic properties of a solid-liquid mixture of He³ at low temperatures. 1974 Nature 6 Dec. 441/3 Compressional solidification of ³He, known as Pomeranchuk cooling,..restricts experiments to the solidification pressure of 34 atmospheres. 1976 Nature 23 Sept. 276/1 A pair of Pomeranchuk cells was used both for cooling the ³He into the superfluid A-phase and also for inducing a flow of liquid through the narrow tube which connected them together. 2005 Cryogenics 45 331/1 Recently we have shown that YbInCu₄ and related compounds also present a solid state Pomeranchuk effect. 2. Chiefly attributive. Designating various concepts relating to the scattering of subatomic particles at high energies. a. Pomeranchuk theorem n. (also Pomeranchuk's theorem) a theorem according to which the reaction cross-sections for a particle and for its antiparticle incident on the same target particle should approach the same constant value as the energy of the incident particle is increased.Proposed by Pomeranchuk in Zh. éksper. i teoret. Fiziki 34(1958) 725. ΘΚΠ the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory > theorem Pomeranchuk theorem1961 1961 Physical Rev. 124 2049/2 We shall present..a rigorous generalization of Pomeranchuk's theorem. 1973 Physics Bull. Mar. 183/2 There is some doubt about the validity of the Pomeranchuk theorem on the constancy of cross sections for K⁺, K⁻ production. 1985 Nucl. Physics B. 254 697 The Pomeranchuk theorem on particle antiparticle cross-section ratios. 1991 Physics Rep. 203 236 We refer the reader to..examples of bounds on particle—antiparticle total cross-section differences (the approach to Pomeranchuk's theorem). b. Pomeranchuk pole n. a kind of Regge pole with even signature, occurring at an angular momentum value of 1 when there is no momentum transferred between the interacting particles, which has zero isospin, charge, hypercharge, and baryon number, and which is regarded as representing a virtual particle (a pomeron) exchanged during the interaction. ΘΚΠ the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory Pomeranchuk pole1962 Pomeranchuk trajectory1962 Pomeranchukon1963 pomeron1963 Pomeranchon1964 1962 Nuovo Cimento 25 735 We are assuming either that the coupling constant of the ρ Regge pole is much smaller than that of the Pomeranchuk (vacuum) pole, or that their trajectories lie close together. 1973 M. Leon Particle Physics xii. 244 Elastic scattering..is supposed to be dominated by the Pomeranchuk pole. 1982 Physics Lett. B. 117 247 The Pomeranchuk pole arising due to multiple production of low-pi hadrons. 1988 Annalen der Physik 45 362 The results have been compared with the predictions of the Pomeranchuk Pole exchange model. c. Pomeranchuk trajectory n. the trajectory traced in the angular momentum plane by a Pomeranchuk pole as the momentum transferred in the interaction increases. ΘΚΠ the world > matter > physics > atomic physics > particle physics > action of dispersing particles > [noun] > Pomeranchuk pole or trajectory Pomeranchuk pole1962 Pomeranchuk trajectory1962 Pomeranchukon1963 pomeron1963 Pomeranchon1964 1962 Physics Lett. 1 226 (title) Determination of the slope of the Pomeranchuk-trajectory from high energy elastic scattering. 1976 N. W. Dean Introd. Strong Interactions xvi. 303 The f (1270) and the f′ (1514) mesons have the correct quantum numbers, but there is considerable question whether either of them actually belongs to the Pomeranchuk trajectory. 1996 Nucl. Physics B. 47 771 Elastic scattering in the forward direction..is described by the exchange of the Pomeranchuk trajectory with the vacuum quantum numbers. This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022). < n.1958
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