Determination of ν2 fundamental band origin for BeH2 and BeD2 from deperturbation analysis of hot bands

2016 ◽  
Vol 145 (7) ◽  
pp. 074310 ◽  
Author(s):  
Maryam S. Motallebipour ◽  
Alireza Shayesteh
Keyword(s):  
Fundamental Band ◽  
Band Origin

Measurement of the pressure-broadening coefficient of NO by saturation spectroscopy of LMR

2000 ◽  
Vol 78 (11) ◽  
pp. 989-995 ◽  
Author(s):  
Y Liu ◽  
J Lin ◽  
Y Guo
Keyword(s):  
Magnetic Resonance ◽  
Hyperfine Structure ◽  
Spectral Lines ◽  
The Self ◽  
Pressure Broadening ◽  
Fundamental Band ◽  
Saturation Spectroscopy ◽  
Intracavity Laser ◽  
Laser Magnetic Resonance

This paper presents a method for the determination of the pressure-broadening coefficient of 15N16O by 14N16O. The hyperfine-structure-resolved spectral lines of NO were obtained with an intracavity laser magnetic resonance spectrometer via Lamb dips. From the spectra, the self-broadening coefficient of the P2(5/2) transition of the 15N16O fundamental band due to its collision with 14N16O at 293 K is determined to be 0.092(7) cm–1/atm. PACS No.: 32.40

Observation of the ν1 fundamental band of D2H+

1984 ◽  
Vol 62 (12) ◽  
pp. 1886-1888 ◽  
Author(s):  
Karen G. Lubic ◽  
T. Amano
Keyword(s):  
Direct Current ◽  
Difference Frequency ◽  
Effective Hamiltonian ◽  
Rotational Constants ◽  
Fundamental Band ◽  
Current Discharge ◽  
Type Transition ◽  
Band Origin ◽  
Direct Current Discharge

The ν1 fundamental band of D2H+ has been observed in absorption between 2640 and 2990 cm−1 using a tunable difference frequency system in conjunction with a multitraversal cell. The D2H+ was generated in a modulated direct current discharge in a mixture of H2 and D2 cooled to 77 K. Thirty-five b-type transition frequencies were fitted to an effective Hamiltonian to determine the rotational constants and the band origin.

The fluorescence excitation spectra of the A 1Au(S1)–X 1Ag(S0) transition of biacetyl: Determination of the band origin

1999 ◽  
Vol 111 (14) ◽  
pp. 6650-6651 ◽  
Author(s):  
Yang Chen ◽  
Linsen Pei ◽  
Jin Jin ◽  
Yide Gao ◽  
Xingxiao Ma ◽  
...  
Keyword(s):  
Excitation Spectra ◽  
Fluorescence Excitation ◽  
Band Origin ◽  
Fluorescence Excitation Spectra

High-Resolution Vibrational Spectra of Furazan IV. The Aj Fundamental v2 at ~ 1418 cm-1 from Fourier-Transform Infrared Spectroscopy

1993 ◽  
Vol 48 (5-6) ◽  
pp. 692-698
Author(s):  
Otto L. Stiefvater ◽  
Stefan Klee
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Excited State ◽  
High Resolution ◽  
Band Origin ◽  
Asymmetric Rotor ◽  
Stretching Vibration ◽  
Ft Ir ◽  
Microwave Data

Abstract The band origin of the A1 mode v2 , which represents the symmetrical stretching vibration of the two C = N bonds of furazan, has been determined from the high-resolution FT-IR band as v20 = 1418.4724± 0.0001 cm-1. The rotational parameters of this excited state, as determined in a preceding DRM microwave study, have been confirmed and their precision was raised through the combined fit of microwave data and of some 2500 rovibrational transitions.The use of conjugate low-J Q-branch lines for the determination of the origin of a B-type IR band of an asymmetric rotor is illustrated.

Infrared spectrum of the fundamental ν1 of deutero-isocyanic acid

1981 ◽  
Vol 59 (10) ◽  
pp. 1313-1326 ◽  
Author(s):  
D. A. Steiner ◽  
S. R. Polo ◽  
T. K. McCubbin Jr. ◽  
K. A. Wishah
Keyword(s):  
High Resolution ◽  
Infrared Spectrum ◽  
Isocyanic Acid ◽  
Centrifugal Distortion ◽  
Rotational Constants ◽  
Fundamental Band ◽  
Band Origin ◽  
Stretching Vibration ◽  
Centrifugal Distortion Constants ◽  
First Time

The ν1 fundamental band of DNCO has been observed for the first time under high resolution. The band origin for this deuterium–nitrogen stretching vibration is found to be at 2637.198 cm−1, rather distant from the previously reported value of 2634.9 cm−1. Eighteen subbands have been analyzed and term values for both ground and ν1 states with K up to 6 have been obtained. Effective rotational constants Bν and centrifugal distortion constants Dν and Hν have also been determined. Interaction is observed with the 2ν3 vibration which has a band origin around 2640 cm−1. Interesting perturbations are observed for the K = 0 and K = 4 levels of ν1.

Collision-induced absorption in the ν2 fundamental band of CH4. I. Determination of the quadrupole transition moment

2001 ◽  
Vol 115 (19) ◽  
pp. 8852-8857 ◽  
Author(s):  
R. H. Tipping ◽  
Alex Brown ◽  
Q. Ma ◽  
J. M. Hartmann ◽  
C. Boulet ◽  
...  
Keyword(s):  
Transition Moment ◽  
Quadrupole Transition ◽  
Fundamental Band ◽  
Induced Absorption

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

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