Use of Counter Tubes in X‐Ray Analysis
作者:
W. Parrish,
T. R. Kohler,
期刊:
Review of Scientific Instruments
(AIP Available online 1956)
卷期:
Volume 27,
issue 10
页码: 795-808
ISSN:0034-6748
年代: 1956
DOI:10.1063/1.1715380
出版商: AIP
数据来源: AIP
摘要:
The more important properties of end‐window Geiger counters, side‐window proportional counters, and NaI(Tl) scintillation counters are reviewed and their performance in the 5 to 50 kvp x‐ray analysis region is compared. Proportional and scintillation counters have resolving times of the order of 0.25 &mgr;sec and virtually eliminate the nonlinearity limitation of the Geiger counter. They produce pulse amplitudes proportional to the energy of the x‐ray quanta, and thus simple pulse height discrimination techniques can be used to obtain greatly improved peak‐to‐background ratios with little loss of intensity of the characteristic x‐rays. They are as reliable and nearly as easy to use as Geiger counters. The electronic discrimination method is described and explained with some practical applications. For a given experimental arrangement, the measured intensity is determined by the quantum counting efficiency of the counter tube, and the peak‐to‐background ratio is determined by the spectral response of the detector‐discriminator combination.
点击下载:
PDF
(1158KB)
返 回