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1.
Effect of λ/2 SiO_2 overcoat on the laser damage of HfO_2/SiO_2 high-reflector coatings 总被引:4,自引:0,他引:4
The effect of λ/2 SiO2 overcoat on the laser damage characteristics of HfO2/SiO2 high-reflector (HR) coatings is investigated with 1-on-l and N-on-1 laser damage test methods. The laser damage surface of 1-on-l is analyzed by a step analyzer. The surface morphologies show that laser damage makes the coating damaged area protrudent and rough for HR coating without λ/2 silica overcoat, but concave and smooth for HR coating with A/2 silica overcoat. The result of 10-on-l multi-pulse irradiation on the same point of the coating shows that there is an energy density stage on the damage curve. If the laser energy density is within the range of the stage, HfO2/SiO2 HR coatings with λ/2 silica overcoat will not be damaged more than 2 times for multi-shots, and the surface damages are very slight so that there is no impact on the coating performance. Another interesting result is that the energy density stage extends from the damage threshold to the point of about 3 times of threshold, which is similar to the 相似文献
2.
J. Norooz Oliaee M. Dehghany A.R.W. McKellar 《Journal of Molecular Spectroscopy》2009,257(2):133-10422
Infrared spectra of OCS-C2H2 and OCS-C2D2 complexes in the region of the C-O stretching fundamental of OCS (∼2060 cm−1) are studied in a pulsed supersonic slit-jet expansion using a tunable diode laser. For each complex, two bands are observed and assigned to distinct near-parallel and the T-shaped isomers. Ground state parameters were previously determined from microwave studies, so analysis of the infrared spectra gives information on the vibrational shifts upon complex formation as well as rotational and centrifugal distortion parameters for the excited states. All four bands show a red shift with respect to the monomer band origin, with the T-shaped isomer having a much larger shift than the near-parallel isomer. Disappearance of the T-shaped isomer when argon is used as a carrier gas supports the notion that the near-parallel isomer is the lowest energy form of the complex. 相似文献
3.
《中国物理 B》2021,(4)
The mass-and field-shift parameters of the two 2 s ~2 S_(1/2)→2 p ~2 p_(1/2,3/2) transitions in the Li-like Ca ions are calculated by using multi-configuration Dirac-Hartree-Fock(MCDHF) and the relativistic configuration interaction(RCI) methods with the inclusion of the transverse photon(Breit) interaction,vacuum polarization and self-energy corrections.In addition,the mass shift and field shift of these two transitions are calculated,where the field shift is calculated by using the evaluated value δr~2 obtained by [Atomic Data and Nuclear Data Tables 99 69(2013)].It is found that the mass shift of Li-like Ca ions is greater than the field shift. 相似文献
4.
Experimental study on the system of Cl/Cl_2/He/HN_3/I_2 总被引:2,自引:0,他引:2
Using a microwave generator, chlorine diluted by helium was dissociated to chlorine atoms that subsequently reacted with hydrogen azide to produce the excited states of NCl(a1△). Meanwhile, molecular iodine with carrier gas of helium reacted with atomic chlorine to produce atomic iodine which then was pumped to excited state of I(2P1/2) by an energy transfer reaction from NCl(a1△). In this paper, the changes of NCl(a1△) and NCl(b1∑) emission intensity is presented when I2/He is introduced into the stream of Cl/Cl2/He/HN3/NCl(a1△)/NCl(b1∑). The dependences of atomic iodine I(2P1/2) on flow rates of gases were also investigated. The optimum parameters for I(2P1/2) production are given. 相似文献
5.
O.N. Ulenikov O.L. Khabibulina E.S. Bekhtereva H. Bürger 《Journal of Molecular Spectroscopy》2003,217(2):288-297
The infrared spectral regions of the P-D stretching fundamental band ν2 and the first overtone band 2ν2 of PH2D were recorded with a resolution of 2.7×10−3 and , respectively. In the analysis about 710 and 440 transitions were assigned to the ν2 and 2ν2 bands. These provided 358 and 268 upper rovibrational energy terms, respectively. Resonance interactions between the states (010000) and (000200) were taken into account in the Hamiltonian used to fit upper energies of the (010000) state. The rovibrational energies of the (020000) state were fitted with a Hamiltonian for an isolated vibrational state. 相似文献
6.
An analytical method has been proposed for calculating the probabilities P
i
(2)(s) of existence of X-X, X−□, and □−□ pair interactions in the nonmetal sublattice of M
2tX2t−1 superstructures formed in strongly nonstoichiometric compounds MX
y
(MX
y
□1−y) and M
2X
y
(MXy/2□1−y/2) with a high content of structural vacancies □. The main characteristics necessary for the quantitative determination of
the probabilities Pi(2)(s) as functions of the composition, degree of long-range order, symmetry, and structure type have been determined for all the
known superstructures M
2tX2t−1. 相似文献
7.
M. Aguilar-Benitez M. C. Albajar A. Ferrando J. A. Rubio J. Salicio R. Armenteros C. Dionisi Ph. Gavillet P. F. Loverre M. Mazzucato L. Dobrzynski D. Pennino I. Sjögren S. Rodebäck S. O. Holmgren 《Zeitschrift fur Physik C Particles and Fields》1981,8(4):313-333
Results are presented for the quasi two-body hypercharge exchange reactions of the type 0?1/2+→2+1/2+: $$\begin{gathered} \pi ^ - p \to K^0 (1420)(\Lambda ,\sum ^0 ), \hfill \\ K^ - p \to f^0 (1270)(\Lambda ,\sum ^0 ), \hfill \\ K^ - p \to f\prime (1515)(\Lambda ,\sum ^0 ), \hfill \\ \end{gathered} $$ using data from two high statistics bubble chamber experiments. The total and differential cross sections are presented and compared with those obtained for the corresponding vector meson reactions and with simple phenomenological ideas. 相似文献
8.
The spectrum of the ν7 band of cis-ethylene-d2 (cis-C2H2D2) has been recorded with an unapodized resolution of 0.0063 cm−1 in the 740-950 cm−1 region using a Bruker IFS 125 HR Fourier transform infrared spectrometer. By fitting 2186 infrared transitions of ν7 with a standard deviation of 0.00060 cm−1 using a Watson’s A-reduced Hamiltonian in the Ir representation, accurate rovibrational constants for ν7 = 1 state have been derived. The band center of ν7 has been found to be 842.20957 ± 0.00004 cm−1. In a simultaneous fit of 1331 infrared ground state combination differences from the present ν7 transitions, together with 22 microwave frequencies, ground state constants have been improved. The rms deviation of the ground state fit was 0.00027 cm−1. 相似文献
9.
We optimize the room-temperature etching of InP using Cl2/CH4/H2 and Cl2/N2 inductively coupled plasma reactive ions. A design of experiment is used in the optimization. The results, in terms of etch rate, surface roughness and etched profile, are presented. These Cl2-based recipes do not require substrate heating and thus can be more cost effectively and widely applied. The Cl2/CH4/H2 process is able to give a higher etch rate (about 850 nm/min) and cleaner surface with less polymer formation compared to the conventional CH4/H2 process. The Cl2/N2 process produces even higher etch rate (as high as 2μm/rain), but rougher surface with slight sidewall undercut. The Cl2/N2 process also has no polymer formation due to the absence of methane gas. Both the processes give very good selectivity to the silicon dioxide (SiO2) etch mask. The selectivity of InP to the oxide mask (up to 55:1) for the Cl2/N2 process is one of the highest reported so far. The etched structures possess reasonably good sidewall verticality and surface quality comparable to that obtained under elevated temperature condition (〉 200℃). 相似文献
10.
A 2Δ-2Π system of NiF has been obtained in emission from a “composite wall hollow cathode” in the blue region. High-dispersion rotational analysis has led to the following constants (in cm?1):
2Π1/2 | 2Π3/2 | 2Δ3/2 | 2Δ5/2 | ||||
---|---|---|---|---|---|---|---|
B | 0.3861 | 0.3886 | 0.3772 | 0.3792 | |||
D × 106 | 0.46 | 0.35 | 0.40 | 0.37 | |||
p | 0.154 | ||||||
pj | ?3.8 × 10-6 |
State | |||||||
0 | 17924.335 (7) | 0.17989 (4) | 0.177 (7) | 0.03853 (7) | |||
1 | 842.574 (7) | 0.18701 (4) | 0.163 (7) | 0.01496 (9) | |||
0 | 432.566 (6) | 0.18818 (4) | 0.162 (7) | 0.01508 (9) | |||
1 | 411.289 (7) | 0.18724 (4) | 0.184 (7) | ?0.96 (6) | |||
0 | — | 0.18839 (4) | 0.160 (7) | ?0.11 (6) |
35ClO2 | 37ClO2 | |||||
945.592 357(60) | 939.602 909(66) | cm?1 | ||||
μ′ | 1.788 39(13) | 1.788 46(15) | D | |||
μ″ | 1.791 95(10) | 1.792 10(13) | D | |||
δμ | ?0.003 56(18) | ?0.003 64(26) | D |
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