HIGH-RESOLUTION VISIBLE SPECTRUM FOR THE A(3)PI(1)-X(1)SIGMA(+) SYSTEM OF IBR

D R T  APPADOO; P F  BERNATH; R J  LEROY

HIGH-RESOLUTION VISIBLE SPECTRUM FOR THE A(3)PI(1)-X(1)SIGMA(+) SYSTEM OF IBR

D R T APPADOO, P F BERNATH, R J LEROY

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

New high-resolution absorption and laser excitation spectra of the A(3)II(1)-X(1) Sigma(+) system of IBr, consisting of approximately 4000 lines of over 40 bands spanning the vibrational range v' = 6-29 and v'' = 1-4 for each of the two isotopomers, have been recorded and analyzed. Combined with previous microwave and infrared data and fluorescence progressions into the X state, and with new data obtained from laser excitation of the lowest levels of the A state, they formed the core of a global fit to mass-reduced Dunham expansions that yields new molecular constants for the A and X states of (IBr)-Br-79 and (IBr)-Br-81. Inability to fully account for all data within the experimental uncertainties points to the existence of substantial perturbations or ''non-mechanical'' behaviour for A-state levels v' > 24.

Original language	English
Pages (from-to)	1265-1272
Number of pages	8
Journal	CANADIAN JOURNAL OF PHYSICS
Volume	72
Issue number	11-12
Publication status	Published - 1994

Keywords

DUNHAM COEFFICIENTS
ISOTOPE DEPENDENCE
MASS DEPENDENCE
SPECTROSCOPY
LASER

Cite this

@article{ec130912bebc4eb0b833968b640648a6,

title = "HIGH-RESOLUTION VISIBLE SPECTRUM FOR THE A(3)PI(1)-X(1)SIGMA(+) SYSTEM OF IBR",

abstract = "New high-resolution absorption and laser excitation spectra of the A(3)II(1)-X(1) Sigma(+) system of IBr, consisting of approximately 4000 lines of over 40 bands spanning the vibrational range v' = 6-29 and v'' = 1-4 for each of the two isotopomers, have been recorded and analyzed. Combined with previous microwave and infrared data and fluorescence progressions into the X state, and with new data obtained from laser excitation of the lowest levels of the A state, they formed the core of a global fit to mass-reduced Dunham expansions that yields new molecular constants for the A and X states of (IBr)-Br-79 and (IBr)-Br-81. Inability to fully account for all data within the experimental uncertainties points to the existence of substantial perturbations or ''non-mechanical'' behaviour for A-state levels v' > 24.",

keywords = "DUNHAM COEFFICIENTS, ISOTOPE DEPENDENCE, MASS DEPENDENCE, SPECTROSCOPY, LASER",

author = "APPADOO, {D R T} and BERNATH, {P F} and LEROY, {R J}",

year = "1994",

language = "English",

volume = "72",

pages = "1265--1272",

journal = "CANADIAN JOURNAL OF PHYSICS",

issn = "0008-4204",

publisher = "National Research Council of Canada",

number = "11-12",

}

TY - JOUR

T1 - HIGH-RESOLUTION VISIBLE SPECTRUM FOR THE A(3)PI(1)-X(1)SIGMA(+) SYSTEM OF IBR

AU - APPADOO, D R T

AU - BERNATH, P F

AU - LEROY, R J

PY - 1994

Y1 - 1994

N2 - New high-resolution absorption and laser excitation spectra of the A(3)II(1)-X(1) Sigma(+) system of IBr, consisting of approximately 4000 lines of over 40 bands spanning the vibrational range v' = 6-29 and v'' = 1-4 for each of the two isotopomers, have been recorded and analyzed. Combined with previous microwave and infrared data and fluorescence progressions into the X state, and with new data obtained from laser excitation of the lowest levels of the A state, they formed the core of a global fit to mass-reduced Dunham expansions that yields new molecular constants for the A and X states of (IBr)-Br-79 and (IBr)-Br-81. Inability to fully account for all data within the experimental uncertainties points to the existence of substantial perturbations or ''non-mechanical'' behaviour for A-state levels v' > 24.

AB - New high-resolution absorption and laser excitation spectra of the A(3)II(1)-X(1) Sigma(+) system of IBr, consisting of approximately 4000 lines of over 40 bands spanning the vibrational range v' = 6-29 and v'' = 1-4 for each of the two isotopomers, have been recorded and analyzed. Combined with previous microwave and infrared data and fluorescence progressions into the X state, and with new data obtained from laser excitation of the lowest levels of the A state, they formed the core of a global fit to mass-reduced Dunham expansions that yields new molecular constants for the A and X states of (IBr)-Br-79 and (IBr)-Br-81. Inability to fully account for all data within the experimental uncertainties points to the existence of substantial perturbations or ''non-mechanical'' behaviour for A-state levels v' > 24.

KW - DUNHAM COEFFICIENTS

KW - ISOTOPE DEPENDENCE

KW - MASS DEPENDENCE

KW - SPECTROSCOPY

KW - LASER

M3 - Article

VL - 72

SP - 1265

EP - 1272

JO - CANADIAN JOURNAL OF PHYSICS

JF - CANADIAN JOURNAL OF PHYSICS

SN - 0008-4204

IS - 11-12

ER -