Majoranan.

Brit.

/ˌmeɪdʒəˈrɑːnə/,

/ˌmʌɪəˈrɑːnə/, U.S.

/ˌmeɪdʒəˈrɑnə/,

/ˌmaɪəˈrɑnə/

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

Etymology: < the name of Ettore Majorana (1906–38), Italian physicist, noted especially for pioneering work in the theory of subatomic particles.

Physics.

1. Majorana force n. the exchange force between two nucleons, in which charge and spin are both exchanged.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > baryon > [noun] > nucleon > exchange force between nucleons

Majorana force1938

1938 Proc. Royal Soc. A. 166 524 The interaction is therefore just of the required form consisting of Heisenberg and Majorana forces of the right sign so as to allow one to make the triplet state of the deuteron the lowest stable state.

1987 Nucl. Physics A. 465 26 It has now become possible to determine the strength of the Majorana force for the first time in a large number of nuclei.

2. Majorana effect n. birefringence to light travelling in a direction at right angles to an applied magnetic field, observed in some liquids and some crystalline materials.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > double refraction > effect of

Majorana effect1960

1960 McGraw-Hill Encycl. Sci. & Technol. VIII. 68/1 Majorana effect. This deals with optical anisotropy of colloidal solutions.

1980 IEEE Trans. Instrumentation 29 304 The Majorana effect on the hydrogen maser and the cesium (Cs) beam frequency standard is studied.

3. Majorana particle n. a particle of spin ½ which is its own antiparticle.

ΘΚΠ

the world > matter > physics > quantum theory > electron spin > [noun] > particle as own anti-particle

Majorana particle1970

1970 Physical Rev. D. 1 571 The current operator is shown to be timelike even for the spacelike solutions, and it is shown to lead to a finite process of emission of light by charged Majorana particles.

1984 Nature 1 Mar. 14/1 If neutrinos are their own antiparticles (that is, are Majorana rather than Dirac particles), the probability of neutrinoless double β decay is greatly enhanced.

4. Majorana neutrino n. a neutrino which is a Majorana particle.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > neutrino > [noun] > anti-particle of > which is its own anti-particle

Majorana neutrino1980

1980 Physics Lett. B. 93 390/2 A Majorana neutrino is its own antineutrino. Its mass is of course observable.

1987 Physics Lett. B. 196 218 (heading) Magnetic moments of Dirac and Majorana neutrinos.

1989 Sci. Amer. Nov. 34/3 The search for neutrinoless double-beta decay became a test for neutrino mass as well as for Majorana neutrinos.

1996 B. A. Kniehl (title) Mixing renormalization in Majorana neutrino theories.

This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022).

单词	majorana
释义	Majoranan. Brit. /ˌmeɪdʒəˈrɑːnə/, /ˌmʌɪəˈrɑːnə/, U.S. /ˌmeɪdʒəˈrɑnə/, /ˌmaɪəˈrɑnə/ Origin: From a proper name. Etymon: proper name Majorana. Etymology: < the name of Ettore Majorana (1906–38), Italian physicist, noted especially for pioneering work in the theory of subatomic particles. Physics. 1. Majorana force n. the exchange force between two nucleons, in which charge and spin are both exchanged. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle participating in strong interaction > baryon > [noun] > nucleon > exchange force between nucleons Majorana force1938 1938 Proc. Royal Soc. A. 166 524 The interaction is therefore just of the required form consisting of Heisenberg and Majorana forces of the right sign so as to allow one to make the triplet state of the deuteron the lowest stable state. 1987 Nucl. Physics A. 465 26 It has now become possible to determine the strength of the Majorana force for the first time in a large number of nuclei. 2. Majorana effect n. birefringence to light travelling in a direction at right angles to an applied magnetic field, observed in some liquids and some crystalline materials. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > double refraction > effect of Majorana effect1960 1960 McGraw-Hill Encycl. Sci. & Technol. VIII. 68/1 Majorana effect. This deals with optical anisotropy of colloidal solutions. 1980 IEEE Trans. Instrumentation 29 304 The Majorana effect on the hydrogen maser and the cesium (Cs) beam frequency standard is studied. 3. Majorana particle n. a particle of spin ½ which is its own antiparticle. ΘΚΠ the world > matter > physics > quantum theory > electron spin > [noun] > particle as own anti-particle Majorana particle1970 1970 Physical Rev. D. 1 571 The current operator is shown to be timelike even for the spacelike solutions, and it is shown to lead to a finite process of emission of light by charged Majorana particles. 1984 Nature 1 Mar. 14/1 If neutrinos are their own antiparticles (that is, are Majorana rather than Dirac particles), the probability of neutrinoless double β decay is greatly enhanced. 4. Majorana neutrino n. a neutrino which is a Majorana particle. ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > neutrino > [noun] > anti-particle of > which is its own anti-particle Majorana neutrino1980 1980 Physics Lett. B. 93 390/2 A Majorana neutrino is its own antineutrino. Its mass is of course observable. 1987 Physics Lett. B. 196 218 (heading) Magnetic moments of Dirac and Majorana neutrinos. 1989 Sci. Amer. Nov. 34/3 The search for neutrinoless double-beta decay became a test for neutrino mass as well as for Majorana neutrinos. 1996 B. A. Kniehl (title) Mixing renormalization in Majorana neutrino theories. This entry has been updated (OED Third Edition, June 2000; most recently modified version published online March 2022). < n.1938
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