Spectroscopic constants and potential energy curves of Nb2 and Nb2+

被引:19
作者
Balasubramanian, K
Zhu, XL
机构
[1] Univ Calif, Dept Appl Sci, Livermore, CA 94550 USA
[2] Univ Calif Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA
关键词
D O I
10.1063/1.1373692
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Potential energy curves and;spectroscopic constants for 45 low-lying electronic states of Nb-2, 18 electronic states of Nb-2(+), and 2 low-lying states of Nb-2(-) have been computed using the complete active space multiconfiguration self-consistent field followed by the multireference singles + doubles configuration interaction calculations that included up to 17 million configurations. The equilibrium distances (r(e)), vibrational frequencies (w(e)), and energy separations (T-e) are reported. We have also computed the properties of the two lowest electronic states of Nb-2(-). Possible assignments are suggested for the recently observed fragmentation spectra and three-photon fragmentation spectra of Nb-2(+) as well as the spectra of Nb-2. The dissociation energies. and ionization potentials of Nb-2 and Nb-2(+) as well as electron affinities of Nb-2 are computed. The nature of bonding is discussed using the wave function composition and Mulliken population analysis. (C) 2001 American institute of Physics.
引用
收藏
页码:10375 / 10388
页数:14
相关论文
共 30 条
[1]  
AYDIN M, UNPUB
[2]   ELECTRONIC-STRUCTURE OF COINAGE METAL-CLUSTERS [J].
BALASUBRAMANIAN, K .
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, 1989, 61 :291-313
[3]   SPECTROSCOPIC PROPERTIES OF 34 ELECTRONIC STATES OF ZIRCONIUM DIMER (ZR2) [J].
BALASUBRAMANIAN, K ;
RAVIMOHAN, C .
JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (06) :3659-3667
[4]   SPECTROSCOPIC PROPERTIES OF 41 ELECTRONIC STATES OF PD2 [J].
BALASUBRAMANIAN, K .
JOURNAL OF CHEMICAL PHYSICS, 1988, 89 (10) :6310-6315
[5]  
BALASUBRAMANIAN K, 1986, CHEM PHYS LETT, V127, P585, DOI 10.1016/0009-2614(86)80613-3
[6]   SPECTROSCOPIC CONSTANTS AND POTENTIAL-ENERGY CURVES OF HEAVY P-BLOCK DIMERS AND TRIMERS [J].
BALASUBRAMANIAN, K .
CHEMICAL REVIEWS, 1990, 90 (01) :93-167
[7]   SPECTROSCOPIC PROPERTIES OF LOW-LYING ELECTRONIC STATES OF RH-2 [J].
BALASUBRAMANIAN, K ;
LIAO, DW .
JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (10) :3989-3992
[8]  
BALASUBRAMANIAN K, 1997, RELATIVISTIC EFFEC A, P301
[9]  
BALASUBRAMANIAN K, 1997, RELATIVISTIC EFFEC B, P531
[10]  
BALASUBRANAIAN K, 2000, MODIFIED ENHANCED VE