| 11. |
Time Lags in Geiger Counters |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 244-251
Arthur R. Laufer,
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摘要:
Light from a spark was used to produce a primary ionizing event in a Geiger counter by means of the photoelectric effect. The time lag between this event and the detection of the pulse on the counter wire was studied as a function of counter filling, pressure, and overvoltage. The measured lags, ranging from tenths of microseconds to many microseconds, were used to calculate electron mobilities, sheath spread velocities, and electron attachment coefficients. The lags appear to be the result of the transit time required by the initial electrons to move from their point of origin to the high field region, and the time required by the sheath to spread laterally along the wire and to move radially outward far enough to produce an electrical pulse which can be detected.
ISSN:0034-6748
DOI:10.1063/1.1745543
出版商:AIP
年代:1950
数据来源: AIP
|
| 12. |
The Electric Field in a Geiger Counter |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 252-254
Arthur R. Laufer,
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PDF (229KB)
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摘要:
The mechanism of the reduction and recovery of the electric field in a Geiger counter is discussed, and the role of the series resistance is analyzed. The contribution of the collection of the electrons to the total pulse size is shown to be negligible.
ISSN:0034-6748
DOI:10.1063/1.1745544
出版商:AIP
年代:1950
数据来源: AIP
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| 13. |
Laboratory Modifications in the RCA Model EMC Electron Microscope |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 255-257
S. G. Ellis,
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PDF (248KB)
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摘要:
The anode opening was reduced to reduce thermal expansion in the specimen stage. The asymmetry of the objective lens was compensated. Working at the lowest possible angular aperture of illumination and focusing critically (by using a carefully settled fluorescent screen and a high magnification viewer) a resolving power of approximately 50 A.U. was demonstrated on suitable specimens.
ISSN:0034-6748
DOI:10.1063/1.1745545
出版商:AIP
年代:1950
数据来源: AIP
|
| 14. |
Liquid Air Level Control |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 258-258
Mark S. Fred,
Everett G. Rauh,
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ISSN:0034-6748
DOI:10.1063/1.1745547
出版商:AIP
年代:1950
数据来源: AIP
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| 15. |
Low Temperature Gasket |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 259-260
A. Wexler,
W. S. Corak,
G. T. Cunningham,
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ISSN:0034-6748
DOI:10.1063/1.1745549
出版商:AIP
年代:1950
数据来源: AIP
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| 16. |
Simple Method to Seal Liquids of High Vapor Pressure into Glass or Quartz Capillaries |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 260-261
Z. V. Harvalik,
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PDF (164KB)
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ISSN:0034-6748
DOI:10.1063/1.1745550
出版商:AIP
年代:1950
数据来源: AIP
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| 17. |
A High Pressure Fitting for Scintillation Counting |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 261-262
K. D. Timmerhaus,
E. B. Giller,
L. H. Tung,
R. B. Duffield,
H. G. Drickamer,
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ISSN:0034-6748
DOI:10.1063/1.1745552
出版商:AIP
年代:1950
数据来源: AIP
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| 18. |
Optical Centering System for X‐Ray Diffraction Samples |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 262-263
Eugene L. Perrine,
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ISSN:0034-6748
DOI:10.1063/1.1745554
出版商:AIP
年代:1950
数据来源: AIP
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| 19. |
A Manometer Leveling Procedure |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 263-264
John E. Wertz,
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ISSN:0034-6748
DOI:10.1063/1.1745556
出版商:AIP
年代:1950
数据来源: AIP
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| 20. |
New Instruments |
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Review of Scientific Instruments,
Volume 21,
Issue 3,
1950,
Page 264-269
W. A. Wildhack,
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ISSN:0034-6748
DOI:10.1063/1.1745558
出版商:AIP
年代:1950
数据来源: AIP
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