DECAY STUDIES OF 237Np WITH AN IRON-FREE pi ROOT 2 DOUBLE-FOCUSING, beta -RAY SPECTROMETER OF IMPROVED EFFICIENCY.

被引：0
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作者：
Woods, S.A. [1 ]
Christmas, P. [1 ]
Cross, P. [1 ]
Judge, S.M. [1 ]
Gelletly, W. [1 ]
机构：
[1] NPL, Teddington, Engl, NPL, Teddington, Engl
来源：
Nuclear instruments and methods in physics research | 1988年 / A264卷 / 2-3期
关键词：
GAMMA RAYS - PROPORTIONAL COUNTERS - SPECTROMETERS; BETA RAY;
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摘要：
The efficiency of the NPL magnetic beta -ray spectrometer has been increased by a factor approx. 240 so that the decay of long-lived actinide nuclei may be studied. This large increase in efficiency was achieved by the use of a large area multistrip source in the manner of Bergkvist, together with the development of a sixteen element proportional counter. These modifications to the beta -ray spectrometer have permitted the study of internal conversion following the decay of **2**3**7Np. The low-energy level scheme of **2**3**3Pa has been determined on the basis of these measurements and the results of complementary singles and coincidence gamma -ray studies.
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页码：333 / 356
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