Fig. 6.8 Excitation spectrum of luminescence of the I 2 (B,19) and the HeI 2 (B,19) complex VP
products (see [89]) (Baturo, V.V., Lukashov, S.S, Poretsky, S.A., Pravilov, A.M., Zhironkin A.I.:
The HeI 2 van der Waals complexes in a ‘free-rotor’ configuration. J. Phys. B: At. Mol. Opt. Phys.
53, 035101 (8 pp) (2020). https://doi.org/10.1088/1361-6455/ab582b. © IOP Publishing.
Reproduced with permission. All rights reserved)
(E = −15.51 cm
−1 ) is localized in the T-shaped well. The n X ⩾ 3 levels (E ⩾
−8.3 cm
−1 ) have energies above the barrier between linear and T-shaped configurations and are spread over all h values [86].
– the B,v B = 0,n B = 0 vdW level of the HeI 2 complex (E = −12.33 cm
−1 ) is
localized in the T-shaped configuration, whereas n B = 1–6, E = −(8.36–2.34)
cm
−1 , wave functions are spread over all h values [87]. An excitation spectrum
of luminescence of I 2 (B,19) and products of the HeI 2 (B, 19) complexes VP is
shown in Fig. 6.8, as an example.
– the binding energy of the E, v E = 0, n E = 0 vdW level is D
E;0
0 ¼ 16:85 cm
À1 , and
this level is localized in the T-shaped configuration. The n E = 1 level
(E = −10.68 cm
−1 relative to the dissociation limit) is localized around h = 70°
and 110°, and n E ⩾ 2 levels (E ⩾ − 7.74 cm
−1 ) show oscillatory character over
all h = 0–360° values [88] (see Fig. 6.9).
One sees in Fig. 6.9 that symmetry of the wave function of both, B and E, states
to permutation of the nuclei are different for even and odd n: they are even for even
n, and odd for odd n. Therefore the HeI 2 (B, v B , n B ← X, 0, n X and E, v E , n E ← B,
v B , n B ) transitions follow the Dn = even selection rule.
T-shaped HeI 2 (E, v E = 0–17, n E ) complexes. The spectroscopic characteristics
and decay of the T-shaped HeI 2 (E, v E = 0–17, n E ) complexes populated in two-step,
two-color scheme
216
6 Weakly-Bound Complexes and Clusters
products (see [89]) (Baturo, V.V., Lukashov, S.S, Poretsky, S.A., Pravilov, A.M., Zhironkin A.I.:
The HeI 2 van der Waals complexes in a ‘free-rotor’ configuration. J. Phys. B: At. Mol. Opt. Phys.
53, 035101 (8 pp) (2020). https://doi.org/10.1088/1361-6455/ab582b. © IOP Publishing.
Reproduced with permission. All rights reserved)
(E = −15.51 cm
−1 ) is localized in the T-shaped well. The n X ⩾ 3 levels (E ⩾
−8.3 cm
−1 ) have energies above the barrier between linear and T-shaped configurations and are spread over all h values [86].
– the B,v B = 0,n B = 0 vdW level of the HeI 2 complex (E = −12.33 cm
−1 ) is
localized in the T-shaped configuration, whereas n B = 1–6, E = −(8.36–2.34)
cm
−1 , wave functions are spread over all h values [87]. An excitation spectrum
of luminescence of I 2 (B,19) and products of the HeI 2 (B, 19) complexes VP is
shown in Fig. 6.8, as an example.
– the binding energy of the E, v E = 0, n E = 0 vdW level is D
E;0
0 ¼ 16:85 cm
À1 , and
this level is localized in the T-shaped configuration. The n E = 1 level
(E = −10.68 cm
−1 relative to the dissociation limit) is localized around h = 70°
and 110°, and n E ⩾ 2 levels (E ⩾ − 7.74 cm
−1 ) show oscillatory character over
all h = 0–360° values [88] (see Fig. 6.9).
One sees in Fig. 6.9 that symmetry of the wave function of both, B and E, states
to permutation of the nuclei are different for even and odd n: they are even for even
n, and odd for odd n. Therefore the HeI 2 (B, v B , n B ← X, 0, n X and E, v E , n E ← B,
v B , n B ) transitions follow the Dn = even selection rule.
T-shaped HeI 2 (E, v E = 0–17, n E ) complexes. The spectroscopic characteristics
and decay of the T-shaped HeI 2 (E, v E = 0–17, n E ) complexes populated in two-step,
two-color scheme
216
6 Weakly-Bound Complexes and Clusters