CAJ | 학술논문

K(5P)与 H2反应生成KH(v″=0-3)振动态,测量了各振动态的转动分布,转动玻尔兹曼温度为455K,而振动温度为1604K,这个接近池温的转动温度和很高的振动温度是共线碰撞机制的有力证据.利用高分辨率瞬时吸收技术得到各振动能级上转动态的布居分布,从而得到反应碰撞转移速率系数,对于v″=0、1、2、3,分别为(3.45±0.86)×10-13、(1.35±0.34)×10-13、(6.28±1.57)×10-14和(2.35±0.59)×10-14 cm3 s-1.同时研究了K(5P)-H2的电子-振动能量转移,利用相干反斯托克斯拉曼散射(CARS)探测 H2的振动态分布.扫描CARS谱发现v=1、2、3上有布居.由CARS峰值得到 H2(0,1)、(1,1)、(2,1)、(3,1)和(3,3)布居之比.H2(0,1)布居由450K的转动分布得到,因而得到(1,1)、(2,1)、(3,1)和(3,3)态的布居,从而获得K(5P)-H2(1,1)、(2,1)、(3,1)和(3,3)的电子-振转速率系数分别是(1.1±0.3)×10-13、(9.3±2.5)×10-14、(4.2±1.1)×10-14和(3.8±1.0)×10-14 cm3 s-1.
K(5P)여 H2반응생성KH(v″=0-3)진동태,측량료각진동태적전동분포,전동파이자만온도위455K,이진동온도위1604K,저개접근지온적전동온도화흔고적진동온도시공선팽당궤제적유력증거.이용고분변솔순시흡수기술득도각진동능급상전동태적포거분포,종이득도반응팽당전이속솔계수,대우v″=0、1、2、3,분별위(3.45±0.86)×10-13、(1.35±0.34)×10-13、(6.28±1.57)×10-14화(2.35±0.59)×10-14 cm3 s-1.동시연구료K(5P)-H2적전자-진동능량전이,이용상간반사탁극사랍만산사(CARS)탐측 H2적진동태분포.소묘CARS보발현v=1、2、3상유포거.유CARS봉치득도 H2(0,1)、(1,1)、(2,1)、(3,1)화(3,3)포거지비.H2(0,1)포거유450K적전동분포득도,인이득도(1,1)、(2,1)、(3,1)화(3,3)태적포거,종이획득K(5P)-H2(1,1)、(2,1)、(3,1)화(3,3)적전자-진전속솔계수분별시(1.1±0.3)×10-13、(9.3±2.5)×10-14、(4.2±1.1)×10-14화(3.8±1.0)×10-14 cm3 s-1.
The rotational distribution of KH(v″=0-3)produced in the reaction of K(5P)with H2 has been studied.The resulting rotational states fit roughly a statistical distribution at the system tempera-ture,while the vibrational populations are characterized by a Boltzmann vibrational temperature of 1604K.These results provide evidence that the reaction follows a collinear collisional geometry.Using transient absorption techniques distributions of nascent KH rotational populations in the ground (v″=0) state and vibrationally excited (v″=1,2,3)are determined.The rate coefficients of reaction are (3.45 ±0.86)×10-13,(1.35±0.34)×10-13,(6.28±1.57)×10-14and (2.35±0.59)×10-14cm3s-1 for v″=0, 1,2 and 3,respectively.The electronic-to-vibrational energy transfer between K(5P)and H2 has also been investigated.We have used the CARS (Coherent Anti-stokes Raman Scattering)spectral technique to probe the internal state distribution of collisionally-populated H2 molecules.The scanned CARS spec-tra reveal that during E-V energy transfer processes H2 molecules are produced at the v=1 ,2 and 3 vi-brational levels.From the scanned CARS spectral peaks the H2(0,1),(1,1),(2,1),(3,1)and (3, 3)population ratios are obtained.The population in H2 (0,1)is determined from rotational distribution at 450K for v=1. The populations of (1,1),(2,1),(3,1)and (3,3)are obtained.The rate coeffi-cients for K(5P)-H2(1,1),(2,1),(3,1)and (3,3)are (1.1±0.3)×10-13,(9.3±2.5)×10-14,(4.2 ±1.1)×10-14 and (3.8±1.0)×10-14 cm3 s-1 ,respectively.