Atomic-Beam Resonance Measurement of the Differential Polarizability between Zeeman Substates in the Ground State of the Cesium Atom

The values of gJ for all the levels of the ground term 7 F of samarium have been measured by the method of magnetic resonance in an atomic beam. These are J gJ J gJ 1 1·49840 ± 0·00005 4 1·49625 ± 0·00004 2 1·49779 ± 0·00003 5 1·49533 ± 0·00006 3 1·49707 ± 0·00003 6 1·49419 ± 0·00010 A theoretical calculation of some of the corrections to the Landé g -value is presented. These corrections arise from the breakdown of Russell-Saunders coupling and from relativistic and diamagnetic effects. While the numerical agreement with experiment appears superficially to be good, it is shown, by a consideration of the J -dependence of the theoretical corrections, that certain significant discrepancies remain. A new measurement of gJ for the ground state of europium is also reported and discussed. It is gJ (Eu 8 S 7/2 ) = 1·99340 ± 0·00007.

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Development of the Controllable C-field Current Stabilizer for the Atomic Beam Tube of the Cesium Atom Clock

Springer Proceedings in Physics - International Youth Conference on Electronics, Telecommunications and Information Technologies ◽

10.1007/978-3-030-81119-8_64 ◽

2022 ◽

pp. 589-596

Author(s):

Kseniya Arinushkina ◽

Anna Grevsteva ◽

Anton Valov ◽

Nikita Lukashev

Keyword(s):

Atomic Beam ◽

Cesium Atom ◽

Current Stabilizer ◽

Beam Tube

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Hyperfine structure in the ground state of the stable isotopes of europium

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1960.0149 ◽

1960 ◽

Vol 257 (1289) ◽

pp. 269-276 ◽

Cited By ~ 53

Keyword(s):

Stable Isotopes ◽

Magnetic Resonance ◽

Hyperfine Structure ◽

Ground State ◽

Atomic Beam ◽

Theoretical Work ◽

Orbit Coupling ◽

Spin Orbit Coupling ◽

Spin Orbit ◽

Structure Constants

The hyperfine structure of the ground state 4 f 7 6 s 2 8 S 7/2 of 151 Eu and 153 Eu has been measured by the method of magnetic resonance in an atomic beam. The sign of the hyperfine structure and the value of g J have also been measured. The results are: g J = 1·9935 ± 0·0003; A (151) = -20·0523 ± 0·0002 Mc/s, A (153) = -8·8532 ± 0·0002 Mc/s, B (151) = - 0·7012 ± 0·0035 Mc/s, B (153) = - 1·7852 ± 0·0035 Mc/s; A (151)/ A (153) = 2·26498 ± 0·00008, B (151)/ B (153) = 0·393 + 0·003. These results disagree with the values expected for the pure 8 S 7/2 state formed from a half-filled shell of f -electrons. Calculations on the basis of admixture of higher states of the configuration by spin-orbit coupling account for the discrepancy in g J but do not explain the values of the hyperfine structure constants A and B . Further theoretical work is in progress.

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The atomic g values of some rare-earth atoms

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1961.0228 ◽

1961 ◽

Vol 265 (1320) ◽

pp. 133-140 ◽

Cited By ~ 17

Keyword(s):

Rare Earth ◽

Magnetic Resonance ◽

Strong Interaction ◽

Ground State ◽

Atomic Beam ◽

Intermediate Coupling ◽

Resonance Technique ◽

Magnetic Resonance Technique ◽

Good Agreement

The atomic g J factors of several low-lying states in the ground multiplets of CeI, NdI, SmI, GdI, DyI and ErI have been measured by the atomic beam magnetic resonance technique. Intermediate coupling, relativistic and diamagnetic corrections recently calculated by Judd & Lindgren are shown to give good agreement with the measured g values of Nd, Sm, Dy and Er and we conclude that the ground configurations of Dyi and Eri are 4 f 10 6 s 2 and 4 f 12 6 s 2 respectively. The Gdi results are consistent with fairly pure LS coupling between the 5 d and 4 f electrons and the CeI measurements indicate a strong interaction between the ground state, which is probably 5 d 4 f 6 s 2 , 3 H , and a low-lying state from another configuration such as 5 d 2 4 f 6 s , 5 I .

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