闭壳层原子相关效应的多体理论计算：Ne原子基态相关能

对coupled-pair many-electron theory(CPMET)展开中的非线性四体效应采取了近似处理,用角动量图技术和两体函数方法得到了适用于一般闭壳层原子的径向微分方程。然后以X_a模型作为零级近似,通过迭代求解成功地计算了Ne原子基态的任意阶相相关能,从而说明至少对于闭壳层原子体系而言,用X_a模型作零级近似同样可以进行成功的多体理论计算。     

On the Time‐Resolved Optogalvanic Spectra of Neon and Krypton

In this work time resolved optogalvanic signals associated with transitions excited from the first metastable state of neon and krypton have been studied. These gases have similar energy state configurations and it is of significant interest to study their time resolved optogalvanic waveforms resulting from transitions belonging to the states of same quantum numbers. The experimentally observed optogalvanic signals recorded for different discharge currents have been fitted to a theoretical model to obtain parameters that determine amplitudes, instrumental time constants and decay rates of the 1s levels. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

氖等电子序列2p^5nl（l=s,d）系列的高激发态结构

本文用本征通道量子亏损理论方法（ＥＱＤＴ方法）计算了氖等电子序列２ｐ＾５ｎｌ（ｌ＝ｓ，ｄ）系列的高激发态结构。得到基本结构参量（ＥＱＤＴ参量）随净电荷数Ｚｃ增大的变化规律，并从静电相互作用下自旋－轨道相互作用之间的竞争角度给出确切的物理解释。以ＮｅＩ为实例，给出其高激发态结构的具体数值结果。     

氮烃混合工质中氖的作用机理

氮烃混合工质由于有较大的制冷量,在节流制冷器中已广泛应用,然而它的制冷温度却较高,在使用中受到一定的限制。文中通过对在氮烃混合工质中加入氖的分析,揭示了氖降低混合工质制冷温度的机理     

The Coulomb Hole of the Ne Atom

We analyze the Coulomb hole of Ne from highly-accurate CISD wave functions obtained from optimized even-tempered basis sets. Using a two-fold extrapolation procedure we obtain highly accurate results that recover 97 % of the correlation energy. We confirm the existence of a shoulder in the short-range region of the Coulomb hole of the Ne atom, which is due to an internal reorganization of the K-shell caused by electron correlation of the core electrons. The feature is very sensitive to the quality of the basis set in the core region and it is not exclusive to Ne, being also present in most of second-row atoms, thus confirming that it is due to K-shell correlation effects.     

Measurements of electron density, temperature and photoionization cross sections of the excited states of neon in a discharge plasma

In the present work emission and absorption spectroscopy have been used to determine the plasma parameters of neon in a hollow cathode discharge lamp. The excitation temperature is determined using the intensity ratio method and Boltzmann's plot method whereas the electron density is determined from the Stark broadening of the spectral lines. The behavior of the optogalvanic signal as a function of laser energy has been studied for three transitions from the 2p⁵3s [1/2]₂ metastable state following ΔJ=ΔK=0, ±1 dipole selection rules. The saturation technique has been used to measure the photoionization cross section from three intermediate states 2p⁵3p′ [1/2]_1, 2p⁵3p′ [3/2]₂ and 2p⁵3p [5/2]₃ up to the 2p^{5 2}P_1/2 ionization threshold.     

Neon matrix isolation spectroscopy of CO2 isotopologues

The solid neon matrix isolated spectrum of CO₂ are recorded in the 2–5 μm region. Natural and ¹³C or ¹⁸O enriched CO₂ samples were used and the nν₁ + ν₃ (n = 0, 1, 2) series bands of different CO₂ isotopologues have been observed. The solid neon matrix shift due to Fermi-resonance of bands within the same vibrational polyad is analyzed.     

An alternative scheme for calculating the unrestricted Hartree–Fock equation: Application to the boron and neon atoms

We present an alternative scheme for calculating the unrestricted Hartree–Fock (HF) equation. The scheme is based on the variational method utilizing the sophisticated basis functions that include no adjustable parameters. The validity of the present scheme is confirmed by actual calculations of the boron and neon atoms. The total energy of the present scheme is lower than that of the conventional restrictive HF equation, but higher than that of the CI method. Also, the resultant wave function satisfies the electron–nucleus cusp condition.     

Variational treatment of continuum orbitals for Auger electrons emitted from neon

A variational method is applied to obtain the wave function of the continuum Auger electron emitted from an ionized neon atom. The trial function is taken to depend on several adjustable parameters, and the wave function of the electrons in different orbitals, such that all possible virtual states of the quantum mechanical system composed of the Auger electron and the ion are represented. The continuum wave function is improved iteratively by increasing the number of terms.Auger transition rates are then calculated applying the angular momentum average scheme, and are compared with other theoretical and experimental results. Agreement with the latest experiment is achieved.     

Optical Amplification on the 3P0 3F2 Transition in Praseodymium-doped Fluorozirconate Fiber

Small-signal amplification on the 3P0 3F2 transition in a praseodymium-doped fluorozirconate optical fiber at the 632.8-nm He-Ne wavelength, has realized a slope efficiency of 0.15 dB mW and up to 14 dB gain. Spectroscopic and fiber parame ters, including the pump absorption cross section (sigma a 0.14 0.02 10 24 m2), p the signal emission cross section (sigma e 2.1 0.2 10 24 m2), and the 3P state ( ) s 0 lifetime tau 3 49.8 0.3 mus , determined experimentally, independently of the gain, were used to model the performance of the amplifier. The predictions of the rate equation model were in good agreement with the measured gain.