测定汞原子塞曼谱线相对强度

在原塞曼效应实验基础上，测定了塞曼分裂各谱线的相对强度，以作为原实验的补充．     

Acousto-optical effect in the luminescence excitation spectrum of HgI2

A study of the photoluminescence excitation spectrum in a crystal of mercury diiodide is reported. Each of the two luminescence bands peaking at 543 and 572–575 nm investigated was found to have its own excitation spectrum. The excitation spectrum of the 575-nm line in the long-wavelength doublet band has been observed to be sensitive to strong ultrasound vibrations and preliminary irradiation of the sample by 590-nm light. This line is associated with radiative recombination of photocarriers at intrinsic point defects (vacancies or iodine and mercury interstitials) located close to dislocations. The binding energy of the photosensitive center to a dislocation was estimated from the change in the excitation spectrum. Fiz. Tverd. Tela (St. Petersburg) 41, 1965–1968 (November 1999)     

The visible emission spectrum of iodine

The emission spectrum of iodine has been photographed in the visible region at high resolution, and 16 bands of the $\text{B[0}{}^{\mathrm{+}}\text{u(}{}^3\text{Π}\text{)] → X[0}{}^{\mathrm{+}}\text{g(}{}^1\text{Σ}\text{)]}$ system have been rotationall analyzed. Centrifugal distortion constants for the B state are calculated from the empirical (RKR) potential curve using a method which employs semiclassical phase integrals. The results of the rotational analysis are processed together with earlier results to yield improved spectroscopic parameters for the B state, valid for 3 < v′ < 40.     

The electronic emission spectrum of SiB

The gas phase spectrum of the silicon boride radical has been observed for the first time. Two electronic transitions were observed in emission from a corona excited supersonic expansion source. The D⁴Σ⁻-X⁴Σ⁻ system consists of emission from v′ = 0 to v″ = 0-3, while the A⁴Π-X⁴Σ⁻ system consists of numerous bands with v′ = 0-5 and v″ = 0-11, although only the strong 0-0 and 0-1 bands have been analyzed so far.     

The ultraviolet emission spectrum of LaO

The ultraviolet emission spectrum of LaO, obtained under improved experimental conditions, has been reexamined. The high-resolution rotational analysis of the 0, 0 and 0, 1 F²Σ⁺ → X²Σ⁺ and 0, 0 D²Σ⁺ → X²Σ⁺ bands shows that the two excited electronic states F²Σ⁺ and D²Σ⁺ exhibit characteristic features of a b_βJ coupling scheme. A ligand field multiconfigurational calculation shows that these states arise mainly from the 7s and 8s configurations and gives theoretical support to the observed coupling case.     

The emission spectrum of the NS molecule

The investigation of the emission spectrum of NS molecule has been carried out by using a Littrow-type quartz spectrograph and a two meter normal incidence type vacuum spectrograph. Theγ-system (² σ-² π), in which only the bands havingv′=0 and 1 were known previously, has been extended tov′=4. TheδG values of the upper state do not show much regularity indicating some perturbation in this state. The vibrational constants for theΒ-system (² δ-² π) have also been modified slightly by observing more bands for this system. Four new systems, all of which have the ground state as their common lower state, have been observed in the ultraviolet and the vacuum ultraviolet regions.     

The 352 nm emission spectrum of difluorodiazirine

Difluorodiazirine fluoresces strongly in the vapor phase showing an extensive band system from about 352 to 451 nm and with no background continuum. The fluorescence is assigned as $\text{A}\text{?}{}^1\text{B}{}_1\text{(nπ}{}^1\text{)-}\text{X}\text{?}{}^1\text{A}{}_1$ and corresponds to the 352 nm absorption system previously studied.The band system is dominated by a progression in ν₁″, the a₁N = N stretching vibration, with ν₄″, the a₁ CF₂ symmetrical deformation vibration, showing a shorter progression.The 0₀⁰ and most others show type B rotational contours but type C bands, involving ν₅″ (a₂), and probably type A bands, involving ν₇″ (b₁) and perhaps ν₆″ (b₁) are also observed.The extremely low intensity of bands involving ν₃″ (a₁) is surprising but there seems to be no reason to doubt the assignment from infrared and Raman data.There is a strong vibrational perturbation affecting some quite strong bands in a region within about 275 cm^?1 of bands 1_n⁰4₀⁰, where n = 0 – 3. The cause of the perturbation is not known.There is no evidence for the emission spectrum consisting of more than one band system.     

原子的吸收光谱和发射光谱的演示

介绍了利用光学多道分析仪和投影仪在课堂上实时演示原子的吸收光谱和发射光谱的实验方法。     

Thermal emission spectrum of MgI

Thermally excited emission spectrum of MgI, hitherto known only in flame and absorption sources, has been recorded in the spectral region λλ3668–4220, using a high temperature vacuum graphite tube furnace. The bands were classified into three new band systems in the wavelength regions λλ3905–4002, λλ3834–4079 and λλ3668–3888 along with a number of additional bands in the previously known system A, λλ3955–4220. The constants for the various systems are as follows:      

The emission spectrum of B2

The emission spectrum of B₂ was reinvestigated under high resolution. Six bands of ¹¹B₂ (0-0, 1-1, 1-0, 2-1, 3-2, and 0–1) as well as four bands of ¹⁰B¹¹B (0-0, 1-0, 2-1, and 3-2) were rotationally analysed. Accurate rotational and vibrational constants were obtained. The triplet character of the transition (${}^3\text{Σ}{}_{\mathrm{u}}{}^{\mathrm{?}}\text{-X}{}^3\text{Σ}{}_{\mathrm{g}}{}^{\mathrm{?}}$) was unambiguously established for the first time and spin-spin interaction constant is obtained for the excited state.     

The emission spectrum of SeO in the far ultraviolet

The emission spectrum of SeO in the far ultraviolet first observed by Haranath (1) at low dispersion has been photographed in the region 2480-1930 Å under medium resolution and a reanalysis of the vibrational structure of the bands has been presented. Beginning at the longer wavelength end, the spectrum has been analyzed into five band systems which are designated as $\text{c(}{}^1\text{Σ}{}^{\mathrm{+}}\text{)-b(}{}^1\text{Σ}{}^{\mathrm{+}}\text{)}$, x₂-x₁, y₂-y₁, $\text{C(}{}^3\text{Π}\text{)-X}{}^3\text{Σ}{}^{\mathrm{?}}$, and $\text{D(}{}^3\text{Σ}{}^{\mathrm{?}}\text{)-X}{}^3\text{Σ}{}^{\mathrm{?}}$. The lower state of the c-b system is found to be the upper state of the $\text{b(}{}^1\text{Σ}{}^{\mathrm{+}}\text{)-X}{}^3\text{Σ}{}^{\mathrm{?}}$ system observed recently by us (2). The derived constants in cm^?1 for SeO are as follows (the constants of the b state are those derived from Ref. 2).

     

16.

The emission spectrum of CCl⁺     

H. Bredohl  I. Dubois  F. Melen 《Journal of Molecular Spectroscopy》1983,98(2):495-497

The emission bands, first observed by R. F. Barrow, G. Drummond, and S. Walker (Proc. Phys. Soc.A67, 186–187 (1954)) in a discharge through CCl₄, have been rotationally analyzed and found to be due to the A¹Π-X¹Σ⁺ transition of CCl⁺.     

17.

低压氢等离子体发光光谱     

周广旭  张楚楚  徐雯峤  董开拓  朱海丰  刘鹏 《原子与分子物理学报》2019,36(1):73-81

本实验使用2.45 GHz微波(100～200 W)激励产生低压(1～4 kPa)氢等离子体,通过光纤光谱仪探测氢等离子体的发射光谱,并分析了特征谱线分布及谱线强度随压强、功率的变化情况,计算了氢等离子体的电子激发温度.实验结果表明,压强由1 kPa增加至4 kPa,谱线强度减小;功率由100 W增大至200 W,谱线强度增大.随着压强的增大,电子激发温度减小或先减小后增大.     

18.

Fourier transform emission spectroscopy: The vibration-rotation spectrum of CuH     

R.S. Ram  P.F. Bernath  J.W. Brault 《Journal of Molecular Spectroscopy》1985,113(2):269-274

The Fourier transform infrared emission spectrum of CuH was observed. The (1, 0), (2, 1), and (2, 0) vibration-rotation bands of both ⁶³CuH and ⁶⁵CuH were recorded from a copper hollow-cathode discharge in neon and hydrogen. Improved molecular constants for the v = 0, 1, and 2 levels of CuH are provided. This work is the first observation of a vibration-rotation spectrum of a metal hydride in emission.     

19.

The emission spectrum of the diatomic radical, phosphorus selenide     

Sarma N. Vempati  Joseph L. Ma  William E. Jones 《Journal of Molecular Spectroscopy》1985,110(2)

The emission spectrum of the PSe radical is reported for the first time. Seventy-eight reddegraded bands in the region 4000–6500 Å have been measured and assigned to the A²Π-X²Π transition of PSe. Isotope shifts observed for some bandheads have been utilized in deriving the vibrational numbering. The molecular constants have been determined as (in units of cm⁻¹): ω′ = 406.9, ω′_eχ′_e = 1.3, ω″ = 556.9, ω″_eχ″_e = 1.3, and T_e = 19477.3 for the ²Π_1/2 states; and ω′_e = 402.4, ω′_eχ′_e = 1.5, ω″_e = 556.8, ω″_eχ″_e = 1.6, and T_e = 19178.0 for the ²Π_3/2 states.     

20.

Near infrared emission spectrum of HCN     

Georg Ch. Mellau  Brenda P. Winnewisser 《Journal of Molecular Spectroscopy》2008,249(1):23-42

To record the infrared emission of hot molecular gases an optimized emission apparatus for the Bruker IFS 120 HR high-resolution FT-IR spectrometer has been constructed. Using this apparatus the hot gas emission spectrum of HCN at 1420 K has been recorded in the wavenumber region of 6000-6800 cm⁻¹ with a resolution of 0.044 cm⁻¹. This work reports the analysis of 33 bands with 58 subbands (9200 line positions). Thirty-seven rovibronic states of HCN including at 12 603 cm⁻¹ have been characterized for the first time and for 25 other states it was possible to improve the existing spectroscopic constants substantially. The very dense emission spectrum with many overlapping features was analyzed with new spectrum analysis software implemented using the Mathematica^TM computer algebra system. Spectroscopic constants have now been determined for 220 HCN rovibronic states. For 102 states the rovibrational spectroscopic constants have been determined for the first time or improved substantially using emission spectra measured in Giessen.     

State	$\text{T}{}_{\mathrm{e}}$	$\text{ω}{}_{\mathrm{e}}$	$\text{ω}{}_{\mathrm{e}}\text{x}{}_{\mathrm{e}}$	λ
$\text{y}{}_2$	$\text{y}{}_1\text{+ 47830}$	974	6.0
$\text{y}{}_1$	$\text{y}{}_1$	906	21.0
$\text{x}{}_2$	$\text{x}{}_1\text{+ 46009}$	993	2.0
$\text{x}{}_1$	$\text{x}{}_1$	877	8.0
$\text{c(}{}^1\text{Σ}{}^{\mathrm{+}}\text{)}$	53080	954	13.0
$\text{D(}{}^3\text{Σ}{}^{\mathrm{?}}\text{)}\text{F}{}_2$	51422	955	9.3
F1	51356	955	8.5	～36
$\text{C(}{}^3\text{Π}\text{)}$	50873	1034	9.3
$\text{b(}{}^1\text{Σ}{}^{\mathrm{+}}\text{)}$	9570.7	834.9	5.5

The emission spectrum of CCl+

The emission bands, first observed by R. F. Barrow, G. Drummond, and S. Walker (Proc. Phys. Soc.A67, 186–187 (1954)) in a discharge through CCl₄, have been rotationally analyzed and found to be due to the A¹Π-X¹Σ⁺ transition of CCl⁺.     

低压氢等离子体发光光谱

本实验使用2.45 GHz微波(100～200 W)激励产生低压(1～4 kPa)氢等离子体,通过光纤光谱仪探测氢等离子体的发射光谱,并分析了特征谱线分布及谱线强度随压强、功率的变化情况,计算了氢等离子体的电子激发温度.实验结果表明,压强由1 kPa增加至4 kPa,谱线强度减小;功率由100 W增大至200 W,谱线强度增大.随着压强的增大,电子激发温度减小或先减小后增大.     

Fourier transform emission spectroscopy: The vibration-rotation spectrum of CuH

The Fourier transform infrared emission spectrum of CuH was observed. The (1, 0), (2, 1), and (2, 0) vibration-rotation bands of both ⁶³CuH and ⁶⁵CuH were recorded from a copper hollow-cathode discharge in neon and hydrogen. Improved molecular constants for the v = 0, 1, and 2 levels of CuH are provided. This work is the first observation of a vibration-rotation spectrum of a metal hydride in emission.     

The emission spectrum of the diatomic radical, phosphorus selenide

The emission spectrum of the PSe radical is reported for the first time. Seventy-eight reddegraded bands in the region 4000–6500 Å have been measured and assigned to the A²Π-X²Π transition of PSe. Isotope shifts observed for some bandheads have been utilized in deriving the vibrational numbering. The molecular constants have been determined as (in units of cm⁻¹): ω′ = 406.9, ω′_eχ′_e = 1.3, ω″ = 556.9, ω″_eχ″_e = 1.3, and T_e = 19477.3 for the ²Π_1/2 states; and ω′_e = 402.4, ω′_eχ′_e = 1.5, ω″_e = 556.8, ω″_eχ″_e = 1.6, and T_e = 19178.0 for the ²Π_3/2 states.     

Near infrared emission spectrum of HCN

To record the infrared emission of hot molecular gases an optimized emission apparatus for the Bruker IFS 120 HR high-resolution FT-IR spectrometer has been constructed. Using this apparatus the hot gas emission spectrum of HCN at 1420 K has been recorded in the wavenumber region of 6000-6800 cm⁻¹ with a resolution of 0.044 cm⁻¹. This work reports the analysis of 33 bands with 58 subbands (9200 line positions). Thirty-seven rovibronic states of HCN including at 12 603 cm⁻¹ have been characterized for the first time and for 25 other states it was possible to improve the existing spectroscopic constants substantially. The very dense emission spectrum with many overlapping features was analyzed with new spectrum analysis software implemented using the Mathematica^TM computer algebra system. Spectroscopic constants have now been determined for 220 HCN rovibronic states. For 102 states the rovibrational spectroscopic constants have been determined for the first time or improved substantially using emission spectra measured in Giessen.