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@ARTICLE{Cernusak:54976,
author = {Cernusak, I. and Dallos, M. and Lischka, H. and Müller, T.
and Uhlar, M.},
title = {{O}n the ground and some low-lying excited states of
{S}c{B}: {A} multiconfigurational study},
journal = {The journal of chemical physics},
volume = {126},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-54976},
pages = {214311},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {The electronic structure of a series of low-lying excited
triplet and quintet states of scandium boride (ScB) was
examined using multireference configuration interaction
(including Davidson's correction for quadruple excitations)
and single-reference coupled cluster (CC) methods with
averaged natural orbital (ANO) basis sets. The CC approach
was used only for the lowest quintet state. The authors have
analyzed eight low-lying triplets 3Sigma-(2), 3Sigma+,
3Pi(3), and 3Delta(2) dissociating to Sc(2D)/B(2P) atoms and
eight low-lying quintet states 5Sigma-, 5Sigma+, 5Pi(2),
5Phi, and 5Delta(3) dissociating to Sc(4F)/B(2P) atoms. They
report the potential energy curves and spectroscopic
parameters of ScB obtained with the multireference
configuration interaction (MRCI) technique including all
singly and doubly excited configurations obtained with the
ANO-S basis set. For the two lowest states they obtained
also improved ANO-L spectroscopic constants, dipole and
quadrupole moments as well as scalar relativistic effects
based on the Douglas-Kroll-Hess Hamiltonian. They provide
the analysis of the bonding based on Mulliken populations
and occupation numbers. Since the two lowest states, 3Sigma-
and 5Sigma-, lie energetically very close, their principal
goal was to resolve the nature of the ground state of ScB.
Their nonrelativistic MRCI(Q) (including Davidson
correction) results indicate that the quintet is more stable
than the triplet by about 800 cm(-1). Inclusion of scalar
relativistic effects reduces this difference to about 240
cm(-1). The dissociation energies for 5Sigma- ScB range from
3.20 to 3.30 eV while those for the 3Sigma- range from 1.70
to 1.80 eV.},
keywords = {J (WoSType)},
cin = {ZAM},
ddc = {540},
cid = {I:(DE-Juel1)VDB62},
pnm = {Scientific Computing},
pid = {G:(DE-Juel1)FUEK411},
shelfmark = {Physics, Atomic, Molecular $\&$ Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:17567200},
UT = {WOS:000247106600021},
doi = {10.1063/1.2741522},
url = {https://juser.fz-juelich.de/record/54976},
}