Paschen–Back effectn.

Brit.

/ˌpaʃnˈbak ᵻˌfɛkt/, U.S.

/ˌpæʃənˈbæk əˌfɛkt/

Origin: From proper names, combined with an English element. Etymons: proper names Paschen , Back , effect n.

Etymology: < the names of Louis Carl Heinrich Friedrich Paschen (see Paschen n.) and Ernst Emil Alexander Back (1881–1959), German physicist, who jointly published a description of the effect in 1913 ( Ann. der Physik 39 897) + effect n.

Physics.

The splitting of spectral lines that occurs when their source is in a magnetic field so strong that the splitting of each line is comparable in magnitude to the separation of adjacent lines in a multiplet.The spacing of the lines corresponding to the normal Zeeman effect rather than the anomalous Zeeman effect generally observed at lower field strengths.

ΘΚΠ

the world > matter > physics > atomic physics > decomposition of light, spectrum > [noun] > effect involving magnetic field

Zeeman effect1897

Paschen–Back effect1923

the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > splitting effect

Zeeman effect1897

Lorentz triplet1922

Paschen–Back effect1923

1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines vi. 389 The Paschen–Back effect links together only such lines as belong together in a series as multiplicities.

1964 G. W. King Spectrosc. & Molecular Struct. iii. 109 A magnetic field that would be strong enough to produce a resolvable splitting of nuclear Zeeman lines is usually more than sufficient to uncouple I* from J* and cause them to precess independently around the z axis, giving a nuclear Paschen–Back effect instead.

1997 Jrnl. Physics: Condensed Matter 9 10881 Since in the f levels the internal exchange splitting dominates,..the energy level scheme is that of the Paschen–Back effect.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paschen–back effect
释义	Paschen–Back effectn. Brit. /ˌpaʃnˈbak ᵻˌfɛkt/, U.S. /ˌpæʃənˈbæk əˌfɛkt/ Origin: From proper names, combined with an English element. Etymons: proper names Paschen , Back , effect n. Etymology: < the names of Louis Carl Heinrich Friedrich Paschen (see Paschen n.) and Ernst Emil Alexander Back (1881–1959), German physicist, who jointly published a description of the effect in 1913 ( Ann. der Physik 39 897) + effect n. Physics. The splitting of spectral lines that occurs when their source is in a magnetic field so strong that the splitting of each line is comparable in magnitude to the separation of adjacent lines in a multiplet.The spacing of the lines corresponding to the normal Zeeman effect rather than the anomalous Zeeman effect generally observed at lower field strengths. ΘΚΠ the world > matter > physics > atomic physics > decomposition of light, spectrum > [noun] > effect involving magnetic field Zeeman effect1897 Paschen–Back effect1923 the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > splitting effect Zeeman effect1897 Lorentz triplet1922 Paschen–Back effect1923 1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines vi. 389 The Paschen–Back effect links together only such lines as belong together in a series as multiplicities. 1964 G. W. King Spectrosc. & Molecular Struct. iii. 109 A magnetic field that would be strong enough to produce a resolvable splitting of nuclear Zeeman lines is usually more than sufficient to uncouple I* from J* and cause them to precess independently around the z axis, giving a nuclear Paschen–Back effect instead. 1997 Jrnl. Physics: Condensed Matter 9 10881 Since in the f levels the internal exchange splitting dominates,..the energy level scheme is that of the Paschen–Back effect. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1923
随便看	hornage hornail hornback hornbalanced hornband hornbar hornbeak hornbeaks hornbeam hornbeam pollenger hornbeams hornbearer hornbeast hornbeaten hornbeech hornbill hornbill cuckoo hornbills hornbind hornblende hornblende andesite hornblende basalt hornblende boulder hornblende gabbro hornblende granite