THE FORBIDDEN I1Σ−–X1Σ+ ABSORPTION BANDS OF CARBON MONOXIDE

1966 ◽  
Vol 44 (12) ◽  
pp. 3039-3045 ◽  
Author(s):  
G. Herzberg ◽  
J. D. Simmons ◽  
A. M. Bass ◽  
S. G. Tilford
Keyword(s):  
Carbon Monoxide ◽  
Selection Rule ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Absorption Bands ◽  
Coriolis Interaction ◽  
Dipole Radiation ◽  
Vacuum Ultraviolet Region ◽  
Vibrational Constants ◽  
Π State

The forbidden I1Σ−–X1Σ+ transition of CO has been observed in absorption at high resolution in the vacuum ultraviolet region. As expected for a 1Σ−–1Σ+ transition, the bands consist of single Q branches, in which the lines of lowest J are either missing or very weak. Although the selection rule prohibiting Σ−–Σ+ transitions is rigorous for dipole radiation at zero rotation, the I1Σ−–X1Σ+ transition can occur for higher rotational levels because of Coriolis interaction with the A1Π state, which lies very close to the I1Σ− state.Eight bands of the I–X system have been analyzed and from them the rotational and vibrational constants of the I1Σ− state have been determined. Previous information on this state was based entirely on the study of perturbations in the A1Π state. The corresponding perturbations in the I1Σ− state have now been observed. In addition, small "vibrational" perturbations in the ν = 4 and 5 levels (probably caused by interactions with the a3Π state) are found.

Rotational analysis of the forbidden d3 Δi ← X1Σ+ absorption bands of carbon monoxide

1970 ◽  
Vol 48 (24) ◽  
pp. 3004-3015 ◽  
Author(s):  
G. Herzberg ◽  
T. J. Hugo ◽  
S. G. Tilford ◽  
J. D. Simmons
Keyword(s):  
Carbon Monoxide ◽  
High Resolution ◽  
Intensity Distribution ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Rotational Analysis ◽  
Absorption Bands ◽  
Local Perturbations ◽  
Vacuum Ultraviolet Region ◽  
Π State

The forbidden d3Δi–X1Σ+ transition of CO has been observed in absorption at high resolution in the vacuum ultraviolet region. The intensity distribution in the rotational structure of the observed bands is in conformity with the assumption that the transition occurs on account of the interaction between the d3Δ state and a 1Π state, presumably the A1Π state. Thirteen bands of the d–X system have been analyzed yielding more extensive rotational data for the d3Δi state than were previously known. A discussion of the local perturbations in the d state by the A1Π and a3Π states is included.

The absorption spectrum of Cl2 in the vacuum ultraviolet

1981 ◽  
Vol 59 (6) ◽  
pp. 835-840 ◽  
Author(s):  
A. E. Douglas
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Band System ◽  
Rydberg States ◽  
Ultraviolet Region ◽  
Isotopic Molecule ◽  
Vacuum Ultraviolet Region ◽  
Vibrational Constants ◽  
Made In

The absorption spectrum of Cl2 in the vacuum ultraviolet region has been photographed with sufficient resolution to allow rotational analyses of many bands. The separated isotopic molecule 35Cl2 and cooled absorption cells were used to simplify the spectrum. A band system associated with an ionic state has been observed in the 1330–1450 Å range. Many large perturbations in the system prevent the determination of the usual rotational and vibrational constants. Some progress has been made in the analyses of a few bands associated with Rydberg states.

New electronic transitions of the C2 molecule in absorption in the vacuum ultraviolet region

1969 ◽  
Vol 47 (24) ◽  
pp. 2735-2743 ◽  
Author(s):  
G. Herzberg ◽  
A. Lagerqvist ◽  
C. Malmberg
Keyword(s):  
Ground State ◽  
Vacuum Ultraviolet ◽  
Rydberg States ◽  
The Other ◽  
Electronic Transitions ◽  
Lower State ◽  
Ultraviolet Region ◽  
New States ◽  
Vacuum Ultraviolet Region ◽  
Vibrational Constants

Three new electronic transitions of the C2 molecule have been observed in absorption in the region 1300–1450 Å. The system of shortest wavelength is readily identified as a 1Πu–1Σg+ transition; the lower state is the ground state X1Σg+ of the molecule. The other two systems arise by absorption from the low-lying a3Πu state; the upper states are new 3Σg− and 3Δg states. Rotational and vibrational constants of the three new states have been determined. The new states are Rydberg states. Their correlation to the separated atoms is briefly discussed.

ISOTOPE SHIFT OF THE NITROGEN ABSORPTION BANDS IN THE VACUUM ULTRAVIOLET REGION

1964 ◽  
Vol 42 (9) ◽  
pp. 1716-1729 ◽  
Author(s):  
M. Ogawa ◽  
Y. Tanaka ◽  
A. S. Jursa
Keyword(s):  
Isotope Shift ◽  
Vacuum Ultraviolet ◽  
Electronic States ◽  
Normal Incidence ◽  
Ultraviolet Region ◽  
Nitrogen Absorption ◽  
Absorption Bands ◽  
Quantum Numbers ◽  
Vibrational Levels ◽  
Vacuum Ultraviolet Region

The vibrational isotope shift of the nitrogen absorption bands has been studied in the 830–1000 Å region. A 3-meter normal-incidence vacuum spectrograph was used with the helium continuum as background.According to our analysis, the vibrational quantum numbers assigned to the lowest observed vibrational levels for the various electronic states of N214 are as follows: [Formula: see text], 100 824 cm−1, ν = 0; (b 1Πu), 101 455 cm−1, ν = 1; (l 1Πu), 104 146 cm−1, ν = 5; [Formula: see text], 104 366 cm−1, ν = 0; (m 1Πu), 105 350 cm−1, ν = 5 ~ 7; (o 1Πu), 105 703 cm−1, ν = 0; [Formula: see text], 106 649 cm−1, ν = 4; (p 1Πu), 108 373 cm−1, ν = 9 ~ 10; [Formula: see text], 109 833 cm−1, ν = 11 ~ 12; [Formula: see text] 110 944 cm−1, ν = 10; (s ?), 116 688 cm−1, ν > 20; and (t ?), 118 486 cm−1,[Formula: see text]. The observed isotope shift for the bands [Formula: see text], 106 381 cm−1; [Formula: see text], 108 549 cm−1; (f ?), 110 196 cm−1; [Formula: see text] 110 664 cm−1; [Formula: see text], 112 777 cm−1; (h′ ?), 114 841 cm−1; (h″ ?), 116 820 cm−1; and [Formula: see text], 118 778 cm−1 increases in this order and shows that none of these bands corresponds to a (0, 0) band.

The Fourth Positive System of Carbon Monoxide Observed in Absorption at High Resolution in the Vacuum Ultraviolet Region

1969 ◽  
Vol 155 ◽  
pp. 345 ◽  
Author(s):  
J. D. Simmons ◽  
Arnold M. Bass ◽  
S. G. Tilford
Keyword(s):  
Carbon Monoxide ◽  
High Resolution ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Region ◽  
Positive System ◽  
Vacuum Ultraviolet Region

Luminescence Properties of Nd 3+ ‐Doped AlF 3 ‐Based Fluoride Glass in the Vacuum Ultraviolet Region

2020 ◽  
Vol 257 (8) ◽  
pp. 1900475
Author(s):  
Kohei Yamanoi ◽  
Yuki Minami ◽  
Toshihiko Shimizu ◽  
Nobuhiko Sarukura ◽  
Takahiro Murata ◽  
...  
Keyword(s):  
Vacuum Ultraviolet ◽  
Fluoride Glass ◽  
Luminescence Properties ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region

Anisotropic Optical Spectra of YAlO3(YAP) Single Crystals in the Vacuum Ultraviolet Region. III. Spectra of Optical Constants

1994 ◽  
Vol 63 (6) ◽  
pp. 2269-2289 ◽  
Author(s):  
Tetsuhiko Tomiki ◽  
Yoshiiku Ganaha ◽  
Tomoyoshi Futemma ◽  
Tohru Shikenbaru ◽  
Hiroo Kato ◽  
...  
Keyword(s):  
Single Crystals ◽  
Optical Constants ◽  
Vacuum Ultraviolet ◽  
Optical Spectra ◽  
Ultraviolet Region ◽  
Vacuum Ultraviolet Region
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