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Collisional Deactivation of K(7s 2 S) and K(5d 2 D) by No
Author(s) -
Chang MinLung,
Huang JuiTsen,
Lin KingChuen
Publication year - 1990
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199000023
Subject(s) - chemistry , radiative transfer , atomic physics , fluorescence , quenching (fluorescence) , analytical chemistry (journal) , absorption (acoustics) , optics , physics , chromatography
Radiative lifetimes and total deactivation cross sections of K(7 2 S) and K(5 2 D) by collision with NO are studied. The K atomic vapor in either the 7 2 S or the 5 2 D state was prepared by two‐ photon absorption using a dye laser. The decay signal of the time‐resolved fluorescence from the 7 2 S – 4 2 P 1/2 or 5 2 D – 4 2 P 3/2 transition was then monitored. Based on a Stern‐Volmer analysis, the radiative lifetimes are 155 ±8 ns and 561 ± 18 ns for the K(7 2 S) and K(5 2 D) states, respectively. The total deactivation cross sections are 88 ±1Å 2 and 70 ±2Å 2 for the K(7 2 S)‐NO and K(5 2 D)‐NO collisions, respectively. In the absence of NO collisions the radiative lifetimes obtained in this work show excellent agreement with those previously reported. The quenching cross sections for NO have been measured for the first time, and have values in a reasonable range, when compared with Na‐N 2 collisions.