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DAg


Constants of diatomic molecules

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through October, 1974

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 107AgD
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
d 3Sigma+     [(2.09)] 1     [(2.02)]  (47019) 2
Ringstrom and Aslund, 1966
c2 (3Pi2) (47025) [644.7] Z (29)  2.36 3 0.12  [0.00016]  1.90 c2 larrow X 4 R 46748.1 Z
missing citation
c1 (3Pi1) (46939) [(716.0)] 5 (32)  (2.58) 5 (0.13)  (0.00016) 5  (1.82) c1 larrow X R (46700) 5
missing citation
D 1Pi 7     2.35 6   0.00016  1.90 D larrow X R 47160.3 Z
Ringstrom and Aslund, 1966
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
b (3Delta1) 1     [2.468] 8   [0.000095]  [1.859] b larrow X R 44600.5 Z
Ringstrom and Aslund, 1966
B 1Sigma+ (44476) [(811)] 9 (36)  (2.52) 9 (0.12)  (0.000110) 9  (1.84) B larrow X R (44287) 9
missing citation
a 3Pir (41700) 10 (1040) (25)  (>3.2) 10     (<1.63)  
Ringstrom and Aslund, 1966
C 1Pi (41269) (1108) 11 (25)  [3.335] (0.118) 11  [0.000125]  [1.5991] C larrow X VR 41195.5 Z
missing citation
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 1Sigma+ 29960.04 1160.82 31.73 12 -1.942 3.154 0.100 12 -0.009 0.000097  1.6443 A larrow X R 29911.22 Z
Koontz, 1935; Learner, 1962; missing citation
X 1Sigma+ 0 1250.70 Z 17.17  3.2572 0.0722  [0.0000859] 13  1.61804  

Notes

1From perturbations in c1(v=0).
2Estimated energy of v'=0,N'=0 relative to X 1Sigma (v=0,N=0).
3Constants refer to unperturbed regions near J=0. Small Lambda-type doubling.
4R,P much weaker than Q branches.
5Approximate constants for the deperturbed state. v=0 strongly perturbed by more than one state. Origin of 0-0 band (not observed) at 46794 cm-1.
6Perturbations in v=0,1; bands going to v'=0 of AgD have not been analyzed. Constants refer to unperturbed regions near J=0. Large Lambda-type doubling. AgH: Deltanuef(v=0) = 0.244J(J+1)-... AgD: Deltanuef(v=1) = +0.0772J(J+1).
7Constants for v=1:
8Constants refer to unperturbed region near J=O. Large Omega-type doubling; AgH: Deltanuef = 0.156J(J+1)-... AgD: Deltanuef = 0.0337J(J+1)+ ...
9Approximate constants for the deperturbed state. Origins of the 0-0 bands at 44225.0 cm-1 (AgH) and 44277.4 cm-1 (AgD). v=1 is free of perturbations. AgH; B1=4.4l2, D1=3.5E-4, nu0(1-0)=45322.8 cm-1; AgD; B1=2.343, D1=0.95E-4, nu0(1-0)=45097.8 cm-1.
10Constants estimated from perturbations in C 1Pi , B 1Sigma+, D 1Pi of AgH, and b 1 of AgD; vibrational numbering uncertain. +150 leq A leq +200.
11Approximate constants for the deperturbed state. Perturbations in v=0,1,2 are caused by a 3Pi. AgH: DeltaG(1/2)= 1519, DeltaG(3/2)= 1453; AgD: DeltaG(1/2)= 1056, DeltaG(3/2)= 987.
12Anomalous potential curve; see Learner, 1962. Constants for higher vibrational levels of AgH in Bengtsson and Olsson, 1931, Bengtsson-Knave, 1932. The constants for AgD are valid for v leq 4.
13H0= +88E-10(AgH); H0= +6E-10 (AgD).
14Graphical Birge-Sponer extrapolation of X 1Sigma+. Thermochemical value 2.49 eV Farkas, 1929.
15Strong perturbations. Constants valid near J=0 only.
16The only observed level is strongly perturbed by more than one state. Constants refer to unperturbed region around J=l9. Origin of 0-0 band (not observed) at 46692 cm-1.
17P branch very weak or absent.
18Higher order terms are needed to represent levels with v geq 4; see Bengtsson and Olsson, 1931, Bengtsson-Knave, 1932, Gero and Schmid, 1943.
19RKRV potential curve Singh and Rai, 1965.
20From the value for AgH.

References

Go To: Top, Constants of diatomic molecules, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Ringstrom and Aslund, 1966
Ringstrom, U.; Aslund, N., The absorption spectra of silver hydride and silver deuteride in the far ultraviolet, Ark. Fys., 1966, 32, 19. [all data]

Koontz, 1935
Koontz, P.G., The spectrum of AgD, Phys. Rev., 1935, 48, 138. [all data]

Learner, 1962
Learner, R.C.M., The influence of vibration-rotation interaction on intensities in the electronic spectra of diatomic molecules. II. The silver hydride molecule, Proc. R. Soc. London A, 1962, 269, 327. [all data]

Bengtsson and Olsson, 1931
Bengtsson, E.; Olsson, E., Eine neue untersuchung uber die banden des silberhydrids, Z. Phys., 1931, 72, 163. [all data]

Bengtsson-Knave, 1932
Bengtsson-Knave, E., Uber die bandenspektren einiger metallhydride, Nova Acta Regiae Soc. Sci. Ups., 1932, 8, 4, 1-98. [all data]

Farkas, 1929
Farkas, A., Uber die bildung von gasformigen goldhydrid, Z. Phys. Chem. Abt. B, 1929, 5, 467. [all data]

Gero and Schmid, 1943
Gero, L.; Schmid, R., Uber das bandenspektrum des silberhydrids, Z. Phys., 1943, 121, 459. [all data]

Singh and Rai, 1965
Singh, R.B.; Rai, D.K., On the potential energy curves of AgH, AgCl, and AgI, Can. J. Phys., 1965, 43, 1685. [all data]


Notes

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