Acta Physica Sinica
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ISSN 1000-3290
CN 11-1958/O4
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Acta Physica Sinica  
  Acta Physica Sinica--1962, 18 (11)   Published: 15 November 1962
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CONTENT

THE π-π INTERACTION IN THREE PION STATES

HU NING
Acta Physica Sinica. 1962, 18 (11): 545 doi: 10.7498/aps.18.545
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The integral equations for the process γ→3π and K→3π are derived by the Tamm-Dancoff method. The resonance properties of these process are determined completely by the two pion scattering amplitudes. Our approximate solution for the process K→3π is identical with that obtained by Khuri and Treiman using the method of dispersion relations.

ON THE NON-LINEAR INTEGRAL EQUATIONS IN LCAO-SCF METHOD

CHEN SHIH-KANG
Acta Physica Sinica. 1962, 18 (11): 553 doi: 10.7498/aps.18.553
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Roothaan's LCAO-SCF method is extented to the problem of an infinite long-chain, conjugated molecule. A system of non-linear integral equation is obtained. The nature of the equation as well as the question of the existence of anomalous solutions are discussed. Finally, we suggest a methed of linearization and approximations.

A STABILIZED ±20 KV POWER SUPPLY FOR AN ELECTROSTATIC ANALYZER

HSIN SHIEN-CHIEH, Lü YU-CHING
Acta Physica Sinica. 1962, 18 (11): 558 doi: 10.7498/aps.18.558
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A stabilized high voltage power supply for an electrostatic analyzer is described in this paper. The design principle has been analyzed in some detail. The output voltage of this instrument may be varied continuously from ± 5 kv to ±20 kv. Within this range the voltage stability is better than ±0.015% for about 3 hours. The ripple voltage is one part in 16,000. This instrument had since served normally for more than two years and was shown to be sufficiently simple and reliable both in operation and maintenance.

ОБ ОДНОМ НОВОМ ПРЕДСТАВЛЕНИИ В СТАТИСТИЧЕСКОЙ ФИЗИКЕ——Ⅰ.МАТЕМАТИЧЕСКАЯ СТРУКТУРА Г2-ПРЕДСТАВЛЕНИЯ

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Acta Physica Sinica. 1962, 18 (11): 563 doi: 10.7498/aps.18.563
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К РАСЧЕТУ ВИНТОВОГО СИММЕТРИЧНОГО МАГНИТНОГО ПОЛЯ

null
Acta Physica Sinica. 1962, 18 (11): 572 doi: 10.7498/aps.18.572
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INJECTION AND ACCUMULATION OF HIGH ENERGY PARTICLES IN A MAGNETIC MIRROR SYSTEM

LI ZHENG-WU
Acta Physica Sinica. 1962, 18 (11): 586 doi: 10.7498/aps.18.586
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A method to inject beams of H2+ and H° simultaneously into a magnetic mirror system is proposed. From an analysis of the flow of the neutral residual gas in the system the general equation for the rate of accumulation of fast protons is obtained. Parametric study of the condition for exponential build up of the proton density gives results different from those of Post and others.

INSTANTANEOUS OBSERVATION OF THE SPECTRAL EXCITATION PROCESSES IN THE SPARK

WANG SHOU-MIN
Acta Physica Sinica. 1962, 18 (11): 594 doi: 10.7498/aps.18.594
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The time resolution process of excitation intensity of spectral lines in the spark light source is measured. In the spark, operating under the critical damping state, with flash time at about 2×10-6 Sec., the ion lines of higher excitation potential first appear and appear shortly. Experiments show that, as to time, two lines, All and MoⅡ, piled up at 3961.5?, may be fully seperated, providing the possibility to avoid the interferences and to use the sensitive line as spectrum analysis.

THE INVESTIGATION OF THE TIME RESOLUTION CHARACTERISTICS OF A PHOTOMULTIPLIER

WANG SHOU-MIN
Acta Physica Sinica. 1962, 18 (11): 600 doi: 10.7498/aps.18.600
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A measurement for the time resolution limit produced by a photomultiplier, with the accuracy of ± 2~5×10-9 Sec., has been made. With the aid of a hydrogen lamp, illuminating at 5~8×10-8 Sec., the flight time of photoelectrons of serveral kinds of photomultiplier has been determined by employing the oscilloscopic method; an investigation as to the effect of the outer circuit of RCA-5819 for resolution time has been made and the better working state suitable for instant observation for the spectrum excitation process has also been determined.

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Acta Physica Sinica. 1962, 18 (11): 605 doi: 10.7498/aps.18.605
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