Recent developments in radionuclide neutron source emission rate measurements at the National Physical Laboratory

2010 ◽  
Vol 68 (4-5) ◽  
pp. 626-630 ◽  
Author(s):  
N.J. Roberts ◽  
L.N. Jones
Keyword(s):  
Neutron Source ◽  
Emission Rate ◽  
National Physical Laboratory ◽  
Physical Laboratory ◽  
Recent Developments ◽  
Source Emission

Some recent developments at the National Physical Laboratory

1962 ◽  
Vol 265 (1321) ◽  
pp. 141-160
Keyword(s):  
Royal Society ◽  
National Physical Laboratory ◽  
Industrial Research ◽  
Scientific Policy ◽  
Governing Body ◽  
Physical Laboratory ◽  
Recent Developments ◽  
The Creation

When the National Physical Laboratory was founded in 1900, the Royal Society was ‘invited to control the proposed institution and to nominate a governing body’. Since the Royal Society had agitated strongly for the creation of such a laboratory, this invitation was accepted, and although the National Physical Laboratory was incorporated into the Department of Scientific and Industrial Research when that body was created in 1917, the connexion between the Royal Society and the National Physical Laboratory is still very close on all matters of scientific policy.

Convenient method of relative calibration of the neutron source emission rate between different source types

2006 ◽  
Vol 53 (3) ◽  
pp. 1413-1417 ◽  
Author(s):  
H. Harano ◽  
T. Matsumoto ◽  
T. Shimoyama ◽  
Y. Sato ◽  
A. Uritani ◽  
...  
Keyword(s):  
Neutron Source ◽  
Convenient Method ◽  
Emission Rate ◽  
Source Emission

Subsequent comparison of measurements of neutron source emission rate (2016-17) - CCRI(III)-K9.AmBe.2

Metrologia ◽  
2021 ◽  
Vol 58 (1A) ◽  
pp. 06025
Author(s):  
N J Roberts ◽  
C Thiam ◽  
M Capogni ◽  
L Silvi
Keyword(s):  
Neutron Source ◽  
Emission Rate ◽  
Mutual Recognition ◽  
Final Report ◽  
Key Comparison ◽  
Main Text ◽  
Mutual Recognition Arrangement ◽  
Cipm Mra ◽  
Subsequent Comparison ◽  
Source Emission

Main text To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/. The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

International key comparison of measurements of neutron source emission rate (1999–2005): CCRI(III)-K9.AmBe

Metrologia ◽  
2011 ◽  
Vol 48 (1A) ◽  
pp. 06018-06018 ◽  
Author(s):  
N J Roberts ◽  
L N Jones ◽  
Z Wang ◽  
Y Liu ◽  
Q Wang ◽  
...  
Keyword(s):  
Neutron Source ◽  
Emission Rate ◽  
Key Comparison ◽  
Source Emission

The Boundary Layer and Recent Developments

1936 ◽  
Vol 40 (309) ◽  
pp. 563-585 ◽  
Author(s):  
L. Bairstow
Keyword(s):  
Boundary Layer ◽  
National Physical Laboratory ◽  
Boundary Layer Theory ◽  
Compressed Air ◽  
Flat Plates ◽  
Physical Laboratory ◽  
Recent Developments

As time passes more and more knowledge of the flow of fluids past bodies accumulates and of this increase some becomes applied to the problems of the day. Boundary layer theory is being applied at the present time to the problem of the degree of polish which should be given to a wing in order to reduce its profile drag to a minimum. Tests in the compressed air tunnel at the National Physical Laboratory and in flight at Cambridge and Farnborough have recently been directed to this point and give quantitative assurance of the correctness of theory. In what follows, a survey is made of a group of theorems relating to the resistance of various bodies such as aerofoils and flat plates and more generally to streamline forms. The theorems are partly physical and partly mathematical and approximations are numerous and of very different degrees of validity.

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