The Production of High Energy Neutrons by Stripping
Author : R. Serber
Publisher :
Page : 26 pages
File Size : 49,48 MB
Release : 1947
Category : Deuterons
ISBN :
Author : R. Serber
Publisher :
Page : 26 pages
File Size : 49,48 MB
Release : 1947
Category : Deuterons
ISBN :
Author : William J. Knox
Publisher :
Page : 30 pages
File Size : 21,58 MB
Release : 1950
Category : Bismuth
ISBN :
Relative neutron yields in the forward direction from various target elements bombarded with 350 Mev protons and 190 Mev deuterons have been measured. Bismuth fission chambers with a threshold of about 50 Mev were used to detect the high energy neutrons. The actual flux of protons or deuterons traversing each target was determined from the activities induced in graphite monitors attached to the target. When a deuteron beam is used, the neutron yields for light elements agree with the values predicted by the deuteron stripping theory. For the heavy elements the observed values are fitted best by adding a function proportional to Z-sq to the stripping theory values. This may be interpreted as evidence for the production of high energy neutrons by the electric field disintegration of the deuteron. The neutron yields from the proton beam vary approximately as (A - Z)(exp(2/3)) for target elements from C to U. This indicates that the heavy elements are not completely transparent to 350 Mev protons. Beryllium has an anomalous neutron yield 50% higher than that for C. Calculations and measurements on the problem of multiple traversals of beam particles through thin targets are presented.
Author :
Publisher :
Page : pages
File Size : 36,46 MB
Release : 1994
Category :
ISBN :
Author :
Publisher :
Page : 24 pages
File Size : 32,20 MB
Release : 1954
Category : Deuterons
ISBN :
Author : Geoffrey F. Chew
Publisher :
Page : 22 pages
File Size : 15,46 MB
Release : 1949
Category : Deuterons
ISBN :
Author : Warren Heckrotte
Publisher :
Page : 84 pages
File Size : 28,27 MB
Release : 1953
Category : Deuterons
ISBN :
Author :
Publisher :
Page : pages
File Size : 42,23 MB
Release : 1947
Category :
ISBN :
Previous experimental work by Helmholz, McMillan, and Sewell has shown that a narrow beam of high energy neutrons is produced when a beam of 190 Mev deuterons strikes a thin target. The mechanism for the production of the eutrons has been discussed by Serber, who describes a process in which the proton in the deuteron strikes the edge of nucleus in the target and is stripped off, while the neutron misses and continues on its way. It is to be expected that an equal umber of high energy protons are produced by stripping processes in which it is the neutron that hits the nucleus. These high energy protons have been detected by (1) carbon activation, and (2) photographic plates. Both methods give energy distributions in agreement with the energy distribution predicted for protons produced by the stripping process.
Author : Ayman I. Hawari
Publisher :
Page : 9 pages
File Size : 10,98 MB
Release : 1992
Category :
ISBN :
Author : William J. Knox
Publisher :
Page : 20 pages
File Size : 30,1 MB
Release : 1951
Category : Attenuation (Physics)
ISBN :
Author : J. M. Carpenter
Publisher : Cambridge University Press
Page : 539 pages
File Size : 36,28 MB
Release : 2015-09-24
Category : Science
ISBN : 0521857813
This book provides a comprehensive and up-to-date introduction to the fundamental theory and applications of slow-neutron scattering.