SbH和SbD的b1Σ⁺(b⁰(⁺)) ↔ X³Σ⁻(X¹⁰(⁺),X²¹)跃迁的激光诱导荧光研究

LIF Study of the b1Sigma+(b0(+)) left and right arrow X3Sigma-(X10(+),X21) Transitions of SbH and SbD.

作者信息

Shestakov O, Gielen R, Pravilov AM, Setzer KD, Fink EH

机构信息

Fachbereich 9, Bergische Universität-Gesamthochschule Wuppertal, Wuppertal, D-42097, Federal Republic of Germany

出版信息

J Mol Spectrosc. 1998 Sep;191(1):199-205. doi: 10.1006/jmsp.1998.7612.

DOI:10.1006/jmsp.1998.7612

PMID:9724595

Abstract

The b1Sigma+(b0(+)) left and right arrow X3Sigma-(X10(+),X21) transitions of SbH and SbD have been studied by laser-induced fluorescence measurements. Ground state SbH(SbD) radicals were generated in a fast-flow system by reaction of microwave-discharged hydrogen (deuterium) with antimony vapor. Vibrational levels v = 0 and 1 of the b1Sigma+ state were excited with a pulsed dye laser. In addition to five electric dipole branches SR, QP, QR, QQ, and OP, weak magnetic dipole branches PQ were observed in the 0-0 bands of the b1Sigma+ <-- X3Sigma- transitions. Rotational and vibrational constants of the X3Sigma- and b1Sigma+ states were deduced from high-resolution excitation spectra. Time-resolved measurements of the fluorescence decay and measurements of relative line and band intensities allowed determination of the radiative lifetime of the b1Sigma+ state of SbH (tau = 173 +/- 3 µs) and of the electric and magnetic dipole transition moments µ0 = +/-0.036 D, µ1 = -/+0.058 D, |M| = 1.62 Bohr magnetons. Copyright 1998 Academic Press.

摘要

通过激光诱导荧光测量研究了SbH和SbD的b1Σ⁺(b0(⁺)) ↔ X3Σ⁻(X10(⁺),X21)跃迁。在快速流动系统中，通过微波放电的氢气（氘气）与锑蒸气反应生成基态SbH(SbD)自由基。用脉冲染料激光激发b1Σ⁺态的v = 0和1振动能级。在b1Σ⁺ ← X3Σ⁻跃迁的0 - 0带中，除了五个电偶极分支SR、QP、QR、QQ和OP外，还观察到了弱磁偶极分支PQ。从高分辨率激发光谱中推导出X3Σ⁻和b1Σ⁺态的转动和振动常数。通过对荧光衰减的时间分辨测量以及相对谱线和谱带强度的测量，确定了SbH的b1Σ⁺态的辐射寿命（τ = 173 ± 3 µs）以及电偶极和磁偶极跃迁矩µ0 = ±0.036 D，µ1 = - / +0.058 D，|M| = 1.62玻尔磁子。版权所有1998年，学术出版社。