共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
3.
利用多通道量子亏损理论(MQDT)对一价铝离子(AIII)的各受干扰序列:3sns 1S0,3snp 3P0,1,2O,1P1O,3snd 1D2和3snf3F2,3,4O的能级结构进行理论分析。结果表明:前两个序列所受到的干扰较弱,后三个序列则受到了来自干扰态3p4s 1P1O,3p2 1D2和3p3d3F2,3,4O的强烈干扰,而3snf 1F3O序列则受到来自电离限上方干扰态的影响。利用获得的MQDT参数推算出3p3d 1F3O干扰态位于电离限上方5613cm-1处,这一结果与其他作者的预言相符合。
关键词: 相似文献
4.
5.
在中国原子能研究院HI-13串列加速器上用束-箔技术完成了80 MeV Ti离子和C箔相互作用产生的高电离态离子谱观测,与用激光等离子体技术的实验结果做了比较,大多数谱线与激光等离子体技术的实验结果有较好的符合,有3条谱线是未观测到的.这几条谱线为ⅩⅧ 13.406,ⅩⅧ 14.987,17.439nm, 属于2s2p2 4P3/2—2p3 2D3/2, 2s2p2 1S0—2sp3 1P1, 4p 1P0—5d 1P1跃迁.
关键词:
串列加速器
高电荷态原子
激发光谱 相似文献
6.
7.
8.
报道260—360nm波长范围内CF自由基(2+1)共振增强多光子电离(REMPI)激发谱的研究-CF自由基通过Ar/CF4,Ar/CF2Cl2或Ar/CF3COOH混合气体的直流脉冲放电产生-在260—295nm波长范围内,观测到一个新的高Rydbery态振动序列,其带源位于295-22nm(2hν=67746cm-1),分析表明,该振动序列来源于5p Rydberg态的二光子共振激发,测得的振
关键词: 相似文献
9.
10.
11.
We present new data on the even-parity Rydberg states of atomic thallium using two-step three-photon laser excitation technique in conjunction with a thermionic diode ion detector. Atoms are excited from the 6p 2P1/2 ground state to the 7p 2P1/2 intermediate state via two-photon excitation and subsequently promoted to the high lying ns 2 S1/2 and nd 2D3/2 Rydberg states. The first ionization potential of thallium is determined as 49,266.66(1) cm-1 using data for the ns 2 S1/2 (25 ≤ n ≤ 54) and nd 2D3/2 (24 ≤ n ≤ 65) Rydberg series. This value is believed to be more accurate because the contribution due to the hyperfine structure splitting of the 7p 2P1/2 state (0.07185 cm-1) is much smaller as compared to that of the 6p 2P1/2 ground state (0.711 cm-1). 相似文献
12.
Andrey G. Smolin Juan Li Yuxiang Mo Oleg S. Vasyutinskii 《Central European Journal of Physics》2013,11(3):350-356
A high-resolution VUV laser absorption spectroscopy is used to investigate the photon-induced ion-pair formation in D2 in the spectral region from 140117.4 to 140732.0 cm?1. We report determination of photoionization efficiency in ortho-para D2 in supersonic molecular beam with energy resolution of 0.1 cm?1. The assignment of the superexcited D2 Rydberg states is done based on the quantum defect theory. 相似文献
13.
H. Rinneberg J. Neukammer A. König K. Vietzke H. Hieronymus M. Kohl H. -J. Grabka G. Jönsson 《Hyperfine Interactions》1987,38(1-4):515-530
The purpose of the present paper is to illustrate some selected aspects of high resolution laser spectroscopy of Rydberg atoms,
rather than giving an extensive review of the state of the art. The following topics will be discussed: (i) Excitation and
detection of Ba Rydberg atoms with principal quantum numbers up ton≲300; (ii) Stark effect and atomic diamagnetism of high-n Ba Rydberg states in thel-mixing region, (iii) Resonance in singlet-triplet mixing of 6snp1P1 and 6snd1D2 Ba Rydberg states deduced from hyperfine structure measurements. 相似文献
14.
15.
U. Zh. Alimov I. Sh. Muzhdabaev O. Tukhlibaev A. T. Tursunov 《Optics and Spectroscopy》2001,90(6):808-810
The Rydberg nd 2 D 3/2, 5/2 states (n=15–30) of the thallium atom were studied by the method of two-stage excitation with subsequent ionization of the excited atoms by an electric field. The nd 2 D levels were populated via the intermediate 7s 2 S 1/2 states. The fine-structure splitting was found to be representable in the form of a combination of the terms depending on n*?3 and n*?5. 相似文献
16.
M. Kwiatkowski U. Teppner P. Zimmermann 《Zeitschrift für Physik A Hadrons and Nuclei》1980,294(2):109-111
In an atomic beam the metastable 3s3p 3 P-states of Mg I were populated by electron impact. A pulsed tunable dye laser was used to excite the metastable atoms to the 3snd3 D-(n=3–7) and to the 3sns3 S 1-states (n=4and 6). Observing the time dependence of the reemitted resonance light the lifetimes of these states were measured. 相似文献
17.
D. B. Tretyakov I. I. Beterov V. M. Entin E. A. Yakshina I. I. Ryabtsev S. F. Dyubko E. A. Alekseev N. L. Pogrebnyak N. N. Bezuglov E. Arimondo 《Journal of Experimental and Theoretical Physics》2012,114(1):14-24
Experiments are carried out on the spectroscopy of the Förster resonance lines Rb(37P) + Rb(37P) → Rb(37S) + Rb(38S) and microwave transitions nP → n′S, n′D between Rydberg states of cold rubidium atoms in a magneto-optical trap (MOT). Under ordinary conditions, all spectra exhibit a linewidth of 2–3 MHz irrespective of the interaction time between atoms or between atoms and microwave radiation, although the limit resonance width should be determined by the inverse interaction time. The analysis of experimental conditions has shown that the main source of line broadening is the inhomogeneous electric field of cold photoions that are generated under the excitation of initial nP Rydberg states by broadband pulsed laser radiation. The application of an additional electric-field pulse that rapidly extracts photoions produced by a laser pulse leads to a considerable narrowing of lines of microwave resonances and the Förster resonance. Various sources of line broadening in cold Rydberg atoms are analyzed. 相似文献
18.
Laser spectroscopy of the thallium atom based on transitions 6 p 1/2 → 6 D 3/2 → nF 5/2 ( n = 13–24)
The energies and quantum defects of Rydberg states nF
5/2 (n = 13–24) of the thallium atom have been studied experimentally. The Rydberg states were excited from the ground state 62
P
1/2 by the two-stage scheme through the intermediate state 62
D
3/2. By using a collimated atomic beam and monochromatic radiation of two narrow-band tunable lasers, we have succeeded in resolving
the hyperfine and isotopic structures of the ground state of the thallium atom and in determining the energy positions of
the states nF
5/2 accurate to 0.03 cm−1, which exceeds the accuracy achieved in the previous works by more than an order of magnitude. The quantum defect of nF
5/2 states is independent of n within the measurement accuracy and is equal to Δ = 1.0344 ± 0.0008. The ionization potential I
p
= 49266.55 ± 0.03 cm−1 has been found for the 205Tl isotope from the level 62
P
1/2 (F = 0). The energy of the 62
D
3/2 level measured experimentally relative to the state F = 0 of the 205 isotope amounted to 36118.56 ± 0.02 cm−1.
Original Russian Text ? P.A. Bokhan, Dm.E. Zakrevskii, V.A. Kim, N.V. Fateev, 2008, published in Optika i Spektroskopiya,
2008, Vol. 104, No. 5, pp. 771–776. 相似文献
19.
Impact broadening and shifts of Ba transitions to parity forbidden Rydberg states have been measured using two-photon laser spectroscopy techniques. Broadening and shift rates for the 6sns 1S0 (10 < n < 19) and 6snd 1D2 (8 < n < 26) levels due to thermal collisional interactions with Xe, Kr and Ar as perturber gases are plotted. Perturbations due to configuration interactions are discussed. 相似文献
20.
The scalar polarizability constantα 0 for excitedS- andD-states in rubidium and cesium was measured utilizing a two-step excitation scheme. An rf lamp and a single-mode dye laser were used to excite the atoms in a collimated atomic beam. Values ofα 0 were determined for the 9–102 S 1/2 and 7–82 D 3/2 states of rubidium and for the 10–132 S 1/2, 9–102 D 3/2 and 9–112 D 5/2 states of cesium. Further, the isotope shift was evaluated in the 5579 Å rubidium line. A review of experimental polarizability constants for rubidium and cesium is given, and the results are compared with theoretical values. 相似文献