The beryllium atom and beryllium positive ion in strong magnetic fields |
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Authors: | MV Ivanov P Schmelcher |
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Institution: | Theoretische Chemie, Physikalisch-Chemisches Institut, Universit?t Heidelberg, INF 229, 69120 Heidelberg, Germany, DE
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Abstract: | The ground and a few excited states of the beryllium atom in external uniform magnetic fields are calculated by means of our
2D mesh Hartree-Fock method for field strengths ranging from zero up to 2.35×109 T. With changing field strength the ground state of the Be atom undergoes three transitions involving four different electronic
configurations which belong to three groups with different spin projections S
z = 0, - 1, - 2. For weak fields the ground state configuration arises from the 1s
22s
2, S
z = 0 configuration. With increasing field strength the ground state evolves into the two S
z = - 1 configurations 1s
22s2p
-1 and 1s
22p
-13d
-2, followed by the fully spin polarised S
z = - 2 configuration 1s2p
-13d
-24f
-3. The latter configuration forms the ground state of the beryllium atom in the high field regime γ > 4.567. The analogous
calculations for the Be
+ ion provide the sequence of the three following ground state configurations: 1s22s and 1s
22p
-1 (S
z = - 1/2) and 1s2p
-13d
-2 (S
z = - 3/2).
Received 2 October 2000 and Received in final form 8 January 2001 |
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Keywords: | PACS 32 60 +i Zeeman and Stark effects – 31 15 Fx Finite-difference schemes – 31 15 Ne Self-consistent-field methods |
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