US 4,227,084 A · Method of detecting high energy radiation via a bismuth oxide compound

Abstract

X-rays or .gamma.-rays are detected by irradiating a beam of high energy radiation onto a crystalline bismuth oxide compound having the formula Bi.sub.10-14 X.sub.1 O.sub.n wherein X is at least one element selected from the group consisting of Al, Ga, Ge, Si and Ti and n is a numeral substantially equal to the stoichiometric amount of oxygen within the compound. The above bismuth oxide crystalline compound may be placed in a radiation dosimeter or be applied as a radiation-sensitive coating on a cylinder or plate of an apparatus for producing electrostatic copies (i.e., an in a xerographic process or the like).

Drawings1 sheet

Sheet 1Sheet 1 of 1

Drawings

Claims5

Dependent claims

A dosimeter for detecting X-rays and .gamma.-rays comprising:

a hollow capsule having an X-ray and .gamma.-ray--sensitive body therein;
a pair of electrodes attached to opposite surfaces of said body;
means providing an electrical charge operationally coupled to said electrodes;
and
means for sensing changes in the electrical charge on said body operationally coupled to said means for providing an electrical charge to said electrodes;
said X-ray and .gamma.-ray--sensitive body being composed of a crystalline bismuth oxide compound having the formula:
Bi.sub.10-14 X.sub.l O.sub.n
wherein X is at least one element selected from the group consisting of Al, Ga, Ge, Si and Ti and n is a numeral substantially equal to the stoichiometric amount of oxygen within the compound, said compound being .gamma.-ray and X-ray photoconductive so that when said compound is irradiated by a .gamma.-ray or a X-ray, such ray causes an electrical change to occur in the electrical conductivity of said body.

5 more elements

Dependencies are inferred from the claim text.

Description1,675 words

Summary286 words

#1. Field of the Invention

#The invention relates to a novel method of detecting certain radiant energy, such as X-rays or .gamma.-rays and somewhat more particularly to a method of detecting such energy via a crystalline bismuth oxide compound.

#2. Prior Art

Brief description of the drawings1 figure

#FIG. 1 is a somewhat schematic view, partially broken away, of an embodiment of a radiation dosimeter useful in the practice of the invention.

Detailed description1,365 words

#The invention provides a novel method of detecting relatively high energy radiation, such as X-rays, .gamma.-rays and other like short wavelength radiant energy.

#In accordance with the principles of the invention, X-rays, .gamma.-rays and other like radiant energy is detected by irradiating a beam of such radiant energy onto a crystalline bismuth oxide compound having the formula:

#Bi.sub.10-14 X.sub.l O.sub.n

Facts

Application

05/837,197Filed 28 Sep 1977

Priority

DE 264416830 Sep 1976

Granted

7 Oct 1980

Term ended

7 Oct 1997

Estimated · how

Pre-1995 term; greater of 17 years from grant or 20 years from filing when eligible. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification4 codes

G01T 1/16
Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation: measuring radiation intensity
G03G 5/082
Characterised by the photoconductive material being inorganic: and not being incorporated in a bonding material, e.g. vacuum deposited
G01T
Measurement of nuclear or x-radiation
G03G
Electrography

Method of detecting high energy radiation via a bismuth oxide compound

Life of this patent

Method of detecting high energy radiation via a bismuth oxide compound

Life of this patent

Life of this patent

Abstract

Drawings1 sheet

Drawings

Claims5

Description1,675 words

Classification4 codes

Life of this patent

Description1,675 words

Drawings1 sheet