Filters
Results 1 - 10 of 9857
Results 1 - 10 of 9857.
Search took: 0.035 seconds
| Sort by: date | relevance |
Bohme, R.C.
General Mining Union Corp. Ltd., Johannesburg (South Africa)
General Mining Union Corp. Ltd., Johannesburg (South Africa)
AbstractAbstract
[en] Apparatus for measuring radioactive emission from a sample includes: a housing; parallel elongate scintillation crystal radiation detectors; elongate photomultipliers each arranged adjacent and attached to a detector and disposed such that the detector lies between the photomultiplier and the passage for the sample; light transmitting means joining the multipliers to their detectors; and means for connecting electronic measuring means to the photomultipliers. The light transmitting means may comprise optical prisms associated with each photomultiplier and detector. The prism may be octagonal in shape in a direction transverse to the elongate axes of the detector and multiplier. In separate claims: the housing is a lead tunnel; the inside of the housing is lined with lead which has a lower level of radioactive emission than the lead of the tunnel; the wall on the inside of the housing is lined with a metal having a lower atomic number than lead; and the detectors, their multipliers and prisms are held in position within two U-shaped sleeves which surround the passage through the opening
Source
9 Aug 1984; 21 Dec 1979; vp; AU PATENT DOCUMENT 80/65067/B/; ZA PRIORITY 79/6989; Available from Patent Office, P.O. Box 200, Woden, A.C.T; Priority date: 21 Dec 1979
Record Type
Patent
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Novyj tip stsintillyatora s kolodtsem
Source
Komenskeho Univerzita, Bratislava (Czechoslovakia). Prirodovedecka Fakulta; Ustav pro Vyzkum, Vyrobu a Vyuziti Radioisotopu, Prague (Czechoslovakia); p. 77; Oct 1975; International conference on low radioactivity measurement and applications; Smokovec, High Tatras, Czechoslovakia; 6 Oct 1975; Published in summary form only.
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Horrocks, D.L.
Beckman Instruments, Inc., Anaheim, CA (USA)
Beckman Instruments, Inc., Anaheim, CA (USA)
AbstractAbstract
[en] This process, in conjunction with a scintillation counter using at least two detectors in a coincidence counting technique, makes it possible to determine a count of statistical coincidences due to occurrences resulting from emissions of single photons. It also resolves a proportional error at the pre-count and a proportional error at the post-count to be determined by dividing the count rates of statistical coincidences Ssub(c1) and Ssub(c2) by the measured count rate of coincidences Ssub(m)
[fr]
Ce procede permet de determiner, avec un compteur a scintillation utilisant au moins deux detecteurs dans une technique de comptage par coincidence, un compte de coincidences statistiques dues a des evenements resultant d'emissions de photons seuls. De plus, il permet de determiner une erreur proportionnelle au pre-compte et une erreur proportionnelle au post-compte en divisant les taux de compte de coincidences statistiques Ssub(c1) et Ssub(c2) par le taux de compte de coincidences mesure Ssub(m)Original Title
Procede pour determiner le taux de compte de coincidences statistiques dans un compteur a scintillation utilisant la technique de coincidences
Source
6 Jun 1977; 24 p; FR PATENT DOCUMENT 2354568/A/; Available from Institut National de la Propriete Industrielle, Paris (France); Priority claim: 7 Jun 1976, US.
Record Type
Patent
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Source
American Nuclear Society meeting; San Francisco, CA, USA; 12 - 16 Nov 1979; CONF-791103--; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Transactions of the American Nuclear Society; ISSN 0003-018X; 
; v. 33 p. 693-696
; v. 33 p. 693-696
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A selective shielding device to be used in combination with a scintillation camera is described. The shielding device is a substantially oval-shaped configuration removably secured to the scintillation camera. As a result of this combination scanning of preselected areas of a patient can be rapidly and accurately performed without the requirement of mounting any type of shielding paraphernalia on the patient. 1 claim, 2 drawing figures
Primary Subject
Source
12 Oct 1976; 4 p; US PATENT DOCUMENT 3,986,036/A/
Record Type
Patent
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Lange, Kai.
General Electric Co., Schenectady, NY (USA)
General Electric Co., Schenectady, NY (USA)
AbstractAbstract
[en] This invention concerns the scintillation cameras still called gamma ray camera. The invention particularly covers the improvement in the resolution and the uniformity of these cameras. Briefly, in the linearity correction device of the invention, the sum is made of the voltage signals of different amplitudes produced by the preamplifiers of all the photomultiplier tubes and the signal obtained is employed to generate bias voltages which represent predetermined percentages of the sum signal. In one design mode, pairs of transistors are blocked when the output signal of the corresponding preamplifier is under a certain point on its gain curve. When the summation of the energies of a given scintillation exceeds this level which corresponds to a first percentage of the total signal, the first transistor of each pair of each line is unblocked, thereby modifying the gain and curve slop. When the total energy of an event exceeds the next preset level, the second transistor is unblocked to alter the shape again, so much so that the curve shows two break points. If needs be, the device can be designed so as to obtain more break points for the increasingly higher levels of energy. Once the signals have been processed as described above, they may be used for calculating the co-ordinates of the scintillation by one of the conventional methods
[fr]
La presente invention concerne les cameras a scintillation, encore appelees cameras a rayons gamma. L'invention porte plus particulierement sur l'amelioration de la resolution et de l'uniformite de ces cameras. En resume, dans le dispositif de correction de linearite de l'invention, on fait la somme de signaux de tension d'amplitudes differentes qui sont produits par les preamplificateurs de tous les tubes photomultiplicateurs, et on utilise le signal obtenu pour engendrer des tensions de polarisation qui representent des pourcentages predetermines du signal de somme. Dans un mode de realisation, des paires de transistors sont bloquees lorsque le signal de sortie du preamplificateur correspondant est inferieur a un certain point, sur sa courbe de gain. Lorsque la sommation des energies d'une scintillation donnee depasse ce niveau, qui correspond a un premier pourcentage du signal total, le premier transistor de chaque paire de chaque ligne est debloque, ce qui modifie le gain et la pente de la courbe. Lorsque l'energie totale d'un evenement depasse le niveau predetermine suivant, le second transistor est debloque pour modifier a nouveau la pente, si bien que la courbe presente deux points de cassure. Le cas echeant, on peut concevoir le dispositif de facon a obtenir davantage de points de cassure pour les niveaux d'energie de plus en plus eleves. Une fois qu'on a traite les signaux de la maniere decrite ci-dessus, on peut les utiliser pour calculer les coordonnees de la scintillation, selon l'une des manieres classiquesOriginal Title
Dispositif de correction de linearite pour une camera a scintillation
Secondary Subject
Source
16 Jun 1978; 23 p; FR PATENT DOCUMENT 2395514/A/; Available from Institut National de la Propriete Industrielle, Paris (France); Priority claim: 20 Jun 1977, US.
Record Type
Patent
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Abdulmumin, B. Y.
Ahmadu Bello University, Zaria, (Nigeria)
Ahmadu Bello University, Zaria, (Nigeria)
AbstractAbstract
[en] The Centre for Energy Research and Training, Ahmadu Bello University, Zaria operates a Karman A 710 Neutron-Generator which has a five curie (5Ci) target. People working in the Neutron Generator environment may sometime be accidentally exposed to high doses of radiation due to tritium. To this end users of the Neutron Generator at the Centre for Energy Research and Training A.B.U have been monitored by measuring the tritium levels in their urine using liquid scintillation counter LSC2 NE Technology and SR8 Scaler rate-meter NE Technology. The results obtained did not vary much from the background levels. This may suggest that the users had little or no exposure to tritium
Primary Subject
Source
1993; 46 p; Ahmadu Bello University; Zaria, (Nigeria); Available from the Head of Department, Ahmadu Bello University, Zaria, (NG). Physics Dept; Thesis (B.Sc).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Astvatsaturov, R.G.; Boyakhchian, E.M.; Gurjian, V.A.
Erevanskij Fizicheskij Inst., Erevan (Armenia)
Erevanskij Fizicheskij Inst., Erevan (Armenia)
AbstractAbstract
[en] The results of investigation of a scintillation counter consisting of two fins of film scintillator of (80x9x0.1) mm3 size and a plexiglass light guide having the form of a 70 mm high regular truncated pyramid are presented. The counter characteristics were measured by means of 90 Sr(e) and 238 Puα radioactive sources and on the beam of relativistic electrons of the Yerevan synchrotron. The average efficiency of the counter for the sources mentioned is more than 50%. 1 ref
Original Title
Issledovanie schetchika s radiatorom iz plenochnogo stsintillyatora
Source
1991; 9 p
Record Type
Report
Report Number
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A historical review of the development and uses of scintillation counters is given. (U.S.)
Source
21. nuclear science symposium; Washington, DC; 11 Dec 1974; 14. scintillation and semiconductor counter symposium; Washington, DC; 11 Dec 1974; 6. nuclear power systems symposium; Washington, DC; 11 Dec 1974
Record Type
Journal Article
Literature Type
Conference
Journal
IEEE (Inst. Electr. Electron. Eng.) Trans. Nucl. Sci; v. NS-22(1); p. 13-25
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A simple light guide configuration for coupling to thin scintillator sheets is described. Its light collection properties are similar to those of the more conventional 'twisted strip' guide and it offers the advantages of compactness and reduced cost. (orig.)
Record Type
Journal Article
Journal
Nucl. Instrum. Methods Phys. Res; ISSN 0029-554X; ; v. 185(1-3); p. 189-193
; v. 185(1-3); p. 189-193
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
| 1 | 2 | 3 | Next |