Author : E. Tochilin
Release : 1962
Genre : Neutron flux
Kind :
Book Rating : /5 ( reviews)

GET EBOOK

Flux and Spectral Measurements of Primary and Moderated Neutron Sources - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Flux and Spectral Measurements of Primary and Moderated Neutron Sources write by E. Tochilin. This book was released on 1962. Flux and Spectral Measurements of Primary and Moderated Neutron Sources available in PDF, EPUB and Kindle. Radioactive (a, n) neutron sources include Ra-Be, PuF4, and four PuBe13 sources. Comparative neutron emission rates were determined by two separate methods: (1) the manganese sulfate bath with appropriate corrections made for fast neutron escape or capture and for thermal neutron capture by the source; and (2) long counter measurements corrected for energy response and so rce anisotropy. Agreement to within 1 percent was obtained by the two independent methods. A Ra-Be source calibrated against the NBS neutron standard was used as a primary reference Spectral measurements of PuBe13 and PuF4 neutron sources were made with nuclear emulsions. By the use of cylindrical plastic and lead absorbers, an effort was made to moderate the PuBe13 spectrum and thereby obtain additional calibration points for instrument response studies. Spectral changes were initially studied with the doublemoderator technique, followed by later measurements with nuclear emulsions. From flux and spectral measurements of the primary and moderated radioactive sources, the first collision tissue dose was calculated and, in turn, compared to experimental measurements of absorbed dose with proportional counters designed according to the Bragg-Gray principle. (Author).