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HP+


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 July, 1977

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 31PH+
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Deltar (26221) 1 [1398.76] Z   [6.9833] 2 3  [6.28E-4]  [1.5726] A rarrow X R 25770.59 4 Z
missing citation
X 2Pir 0 5 [2299.60] Z   [8.3851] 6 7  [4.16E-4]  [1.4352] A rarrow X R 25770.59 4 Z

Notes

1A0 = +1.38, A1 = +0.82.
2Spin-rotation interaction constant gamma = 0.175. There is a sudden breaking off in v=0 above N=12.
3B1 = 6.5588. All lines originating from F1 levels of v=1 are much weaker than those arising from F2.
4Refers to the zero-point of the Hill-Van Vleck expression for both upper and lower state.
5A0 = +295.94, A1= +296.2.
6Lambda-type doubling constants for v=0; |p| = 0.23, |q| = 0.011.
7B1 = 8.1450.
8From the predissociation in A 2Delta(v=0). A rough extrapolation of the A state to the dissociation limit 1D + 2S leads to D00 ~3.06 eV Narasimham, 1957.
9A0 = 1.35
10Spin-rotation interaction constant gamma = 0.096.
11A0 = +295.83.
12Lambda-type doubling constant |p| = 0.08.

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.

Narasimham, 1957
Narasimham, N.A., The emission spectrum of the PH+ molecule, Can. J. Phys., 1957, 35, 901. [all data]


Notes

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