TY - JOUR
T1 - Rydberg energy levels and quantum defects of B II, Ge II, Si II of subgroups III and IV
AU - Ahmed, Ejaz
AU - Raza, Salman
AU - Hameed, M. Noman
AU - Farooq, Muhammad
AU - Akbar, Jehan
PY - 2020
Y1 - 2020
N2 - Theoretical computations of Rydberg energy levels series and atomic lifetimes for singly ionized boron (B II), silicon (Si II), and germanium (Ge II) have been performed. In the theoretical computation weakest bound electron potential model theory (WBEPMT) is employed. Regularities of changes in quantum defects for the following Rydberg states series: 2sns(1S0), 2snp (3Po0), 2snf(3Fo2,3Fo3,3Fo4), 2snf(1Fo3) of B II; 3s2ns(2S1/2), 3s2nd(2D3/2,5/2), 3s2nf(2 o F5/2,7/2), 3s2ng(2G7/2,9/2) of Si II; and 4s2nf(2Fo5/2), 4s2nf(2Fo7/2), 4s2ng(2G7/2,9/2) of Ge II, up to n = 50 are presented. The atomic lifetimes of the following series: 1s22sns(1S0), 1s22snp(3Po1), 1s22snd (1D2) of B II; 3s2ns(2S1/2), 3s2nf(2 o F5/2,7/2) of Si II; and 4s2ns(2S1/2) of Ge II are predicted with good accuracy. Some high-lying Rydberg energy levels and atomic lifetimes have been presented for the first time. The series for which Rydberg energy levels are computed in this work are unperturbed series.
AB - Theoretical computations of Rydberg energy levels series and atomic lifetimes for singly ionized boron (B II), silicon (Si II), and germanium (Ge II) have been performed. In the theoretical computation weakest bound electron potential model theory (WBEPMT) is employed. Regularities of changes in quantum defects for the following Rydberg states series: 2sns(1S0), 2snp (3Po0), 2snf(3Fo2,3Fo3,3Fo4), 2snf(1Fo3) of B II; 3s2ns(2S1/2), 3s2nd(2D3/2,5/2), 3s2nf(2 o F5/2,7/2), 3s2ng(2G7/2,9/2) of Si II; and 4s2nf(2Fo5/2), 4s2nf(2Fo7/2), 4s2ng(2G7/2,9/2) of Ge II, up to n = 50 are presented. The atomic lifetimes of the following series: 1s22sns(1S0), 1s22snp(3Po1), 1s22snd (1D2) of B II; 3s2ns(2S1/2), 3s2nf(2 o F5/2,7/2) of Si II; and 4s2ns(2S1/2) of Ge II are predicted with good accuracy. Some high-lying Rydberg energy levels and atomic lifetimes have been presented for the first time. The series for which Rydberg energy levels are computed in this work are unperturbed series.
KW - Atomic lifetime
KW - Principal quantum number
KW - Quantum defect
KW - Rydberg atom
KW - Rydberg energy level
KW - Weakest bound electron potential model theory (WBEPMT)
UR - https://www.mendeley.com/catalogue/e0561c70-539c-3f95-ad36-749bc809b034/
U2 - 10.1139/cjp-2018-0821
DO - 10.1139/cjp-2018-0821
M3 - Article
SN - 0008-4204
VL - 98
SP - 274
EP - 286
JO - Canadian Journal of Physics
JF - Canadian Journal of Physics
IS - 3
ER -