Published June 17, 1987 | Version v1
Patent Metadata-only

Method and apparatus for monitoring the concentration of airborne actinides

Creators

Description

The permissible level of radioactivity due to airborne actinides is extremely low: the satisfactory discrimination of actinide emissions from other sources such as naturally occurring radon is, consequently, a problem. This specification discloses the combination of a) selecting and collecting only the larger airborne particles, b) measuring the activity therefrom of emissions in two mutually exclusive windows characteristic respectively of α emission from actinide decay and of α emission from 214Po(RaC'), and c) decay analysis of the measurements to reject emissions which are characteristic of high energy processes (i.e. from RaC') but which have lost sufficient energy to fall within the actinide measurement band. (author)

Availability note (English)

Available from The Patent Office, 25 Southampton Buildings, London, WC2A 1AY.

Additional details

Publishing Information

Imprint Pagination
17 p.
IPC:
Int. Cl. G01t1/167; G01n1/22; G01n1/28.
IPC
Int. Cl. G01t1/167; G01n1/22; G01n1/28.
Patent number
GB patent document 2184228/A/

INIS

Country of Publication
United Kingdom
Country of Input or Organization
United Kingdom
INIS RN
19007483
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S54: ENVIRONMENTAL SCIENCES;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
AEROSOL MONITORING; AIR SAMPLERS; AMERICIUM 241; BACKGROUND RADIATION; CURIUM 242; CURIUM 244; MEV RANGE 01-10; PARTICLE SIZE; PLUTONIUM 238; PLUTONIUM 239; PLUTONIUM 240; PLUTONIUM 241; POLONIUM 214; RADIATION DETECTORS; RADIOACTIVE AEROSOLS; SPECIFICATIONS
Descriptors DEC
ACTINIDE NUCLEI; AEROSOLS; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COLLOIDS; CURIUM ISOTOPES; DAYS LIVING RADIOISOTOPES; DISPERSIONS; ENERGY RANGE; EQUIPMENT; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; ISOTOPES; LABORATORY EQUIPMENT; MEASURING INSTRUMENTS; MEV RANGE; MICROSEC LIVING RADIOISOTOPES; MONITORING; NUCLEI; ODD-EVEN NUCLEI; PLUTONIUM ISOTOPES; POLONIUM ISOTOPES; RADIATIONS; RADIOISOTOPES; SAMPLERS; SIZE; SOLS; SPONTANEOUS FISSION RADIOISOTO; YEARS LIVING RADIOISOTOPES

Optional Information

Secondary number(s)
GB patent application 8528989.