摘要:

Design parameters for an angular accelerometer are developed. The accelerometer incorporates an electrical sensing element which may be energized by dry cell batteries and whose output may be connected directly to a recording galvanometer.

ISSN:0034-6748    

DOI:10.1063/1.1741272

出版商:AIP    

年代:1948

数据来源: AIP

摘要:

The coincidence rate of a perfectly efficient two‐counter telescope embedded in an isotropic field of radiation is obtained in terms of the radiation intensity and the effective dimensions and separation of the counters comprising the telescope. By means of the formulas the counting rate may be located between an upper and a lower bound which in most practical cases differ by only a few percent. The information embodied in the formulas is also presented graphically in a form convenient for ready calculation of the ratio of coincidence rate to radiation intensity once the effective dimensions and separation of the two counters are known.

ISSN:0034-6748    

DOI:10.1063/1.1741273

出版商:AIP    

年代:1948

数据来源: AIP

摘要:

A practical inside Geiger‐Mu¨ller counter for the detection of soft beta‐rays and alpha‐particles is described in conjunction with a simplified method for the preparation of samples for assay. The method for radioactive assay used is tested for reproducibility and accuracy. Direct determination of the specific activity of samples having different chemical composition can be made simply without an initial chemical extraction of the active element.

ISSN:0034-6748    

DOI:10.1063/1.1741274

出版商:AIP    

年代:1948

数据来源: AIP

摘要:

An instrument utilizing a 5‐liter per second diffusion pump is described which allows pressures in the range 0.01 to 5 microns to be measured on a Pirani, thermocouple, McLeod or any other gauge ordinarily operating in the 0.5‐ to 50‐micron range.

ISSN:0034-6748    

DOI:10.1063/1.1741275

出版商:AIP    

年代:1948

数据来源: AIP

摘要:

A design for a simple stable ball‐bearing support for ultracentrifuge turbines is presented. The ball‐bearing drive eliminates the axial oscillations associated with the use of the air bearing.

ISSN:0034-6748    

DOI:10.1063/1.1741276

出版商:AIP    

年代:1948

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1741279

出版商:AIP    

年代:1948

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1741280

出版商:AIP    

年代:1948

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1741282

出版商:AIP    

年代:1948

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1741283

出版商:AIP    

年代:1948

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1741284

出版商:AIP    

年代:1948

数据来源: AIP