Industrial Radiology: The Use of Radioactive Isotopes in Flaw Detection |
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Page 181
The Use of Radioactive Isotopes in Flaw Detection Stepan Vasilʹevich Rumi︠a︡nt︠s︡ev. Ionisation chambers . The principal elements of the ionisation ... ionisation current is induced in the chamber circuit . The induced current is 181.
The Use of Radioactive Isotopes in Flaw Detection Stepan Vasilʹevich Rumi︠a︡nt︠s︡ev. Ionisation chambers . The principal elements of the ionisation ... ionisation current is induced in the chamber circuit . The induced current is 181.
Page 182
... ionisation current increases ( OA region ) as the chamber voltage is increased , the ionising radiation intensity remaining unchanged . At sufficiently high tensions the current intensity be- comes constant ( AB region ) and equal in ...
... ionisation current increases ( OA region ) as the chamber voltage is increased , the ionising radiation intensity remaining unchanged . At sufficiently high tensions the current intensity be- comes constant ( AB region ) and equal in ...
Page 184
... chamber volume V. However , the physical dose rate P. and , hence , the source activity must be large , if the volume V of the ionisation chamber is small . When dealing with 1 cu cm ioni- sation chambers , it is necessary in order to ...
... chamber volume V. However , the physical dose rate P. and , hence , the source activity must be large , if the volume V of the ionisation chamber is small . When dealing with 1 cu cm ioni- sation chambers , it is necessary in order to ...
Contents
PHYSICAL AND ENGINEERING FUNDAMENTALS | 7 |
The Law of Radioactive Decay | 17 |
Radioactive Sources Used in Industrial Radiography | 26 |
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absorbed absorption coefficient alloys alpha-particles aluminium atomic number attenuation barytes beam beta-particles broad-beam calculated capsule centimetre charge cm thick Co⁰ container cracks curie defects depends detector determined device diminishes disintegration dose rate dose-reduction factor dosimeter duralumin effect electron emitted employed ensure equal Exposure chart exposure set-up fatigue limit film-source distance fluorescent fluorescent screens g/cu cm gamma gamma-beam gamma-graphs gamma-inspection gamma-quanta gamma-radiography gamma-rays gram radium equivalent half-life holder increase inspected article inspection unit ionisation chamber irradiation lack of fusion lead foils lead protective length of lack linear absorption coefficient maximum permissible measured method mg radium equivalent neutrons nuclei pair production photon protective barrier protective shield radiation dose radiation energy radiation intensity radiation source radioactive isotopes radiographed rays Roentgen X Roentgen XX scattered radiation scintillation counter sections sensitivity shown in Fig silver bromide Source-film specific activity specific weight spectrum substance Table tion welds X-ray film xeroradiographic plate