CA2198990A1 - Diamond detection - Google Patents

Diamond detection

Info

Publication number
CA2198990A1
CA2198990A1 CA002198990A CA2198990A CA2198990A1 CA 2198990 A1 CA2198990 A1 CA 2198990A1 CA 002198990 A CA002198990 A CA 002198990A CA 2198990 A CA2198990 A CA 2198990A CA 2198990 A1 CA2198990 A1 CA 2198990A1
Authority
CA
Canada
Prior art keywords
modulated
diamond
particle
particle beam
energy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002198990A
Other languages
French (fr)
Other versions
CA2198990C (en
Inventor
Ulf Anders Staffan Tapper
Robert Hamm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Consolidated Mines Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2198990A1 publication Critical patent/CA2198990A1/en
Application granted granted Critical
Publication of CA2198990C publication Critical patent/CA2198990C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/3416—Sorting according to other particular properties according to radiation transmissivity, e.g. for light, x-rays, particle radiation

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Particle Accelerators (AREA)

Abstract

The invention concerns a method of detecting the presence of diamond in a body. In method the body is irradiated with a fast neutron beam modulated between first and second, distinct energy levels which are respectively resonant and non-resonant energy levels for diamond. Corresponding first and second absorption images are obtained for the body and from these images, a third absorption image is derived in which absorption effects attributable to the presence of non-diamond material in the body are eliminated or at least reduced. The resulting image is then analysed for the presence of diamond in the body. The energy modulated fast neutron beam is produced by nuclear reaction between an energy modulated particle beam and a target. The energy modulated particle beam itself is produced by a procedure in which a particle beam is passed sequentially through first and second particle accelerators in series. Modulation is achieved by operating the second particle accelerator alternately in first and second modes to produce, from the particle beam delivered by the first particle accelerator, a particle beam which is modulated between relatively high and relatively low energy levels.
CA002198990A 1996-03-04 1997-03-03 Diamond detection Expired - Fee Related CA2198990C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA961730 1996-03-04
ZA96/1730 1996-03-04

Publications (2)

Publication Number Publication Date
CA2198990A1 true CA2198990A1 (en) 1997-09-04
CA2198990C CA2198990C (en) 2007-06-05

Family

ID=25585569

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002198990A Expired - Fee Related CA2198990C (en) 1996-03-04 1997-03-03 Diamond detection

Country Status (4)

Country Link
AU (1) AU707986B2 (en)
CA (1) CA2198990C (en)
GB (1) GB2310927B (en)
RU (1) RU2151409C1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19750904A1 (en) * 1997-07-29 1999-02-18 Accsys Technology Inc Dual energy ion beam accelerator
DE102009048150A1 (en) * 2009-10-02 2011-04-07 Siemens Aktiengesellschaft Accelerator and method for controlling an accelerator
RU2437725C1 (en) 2010-11-19 2011-12-27 Открытое Акционерное Общество "Научно-Производственное Предприятие "Буревестник" Method of grading minerals to their luminescence properties
RU2438800C1 (en) 2010-11-19 2012-01-10 Открытое Акционерное Общество "Научно-Производственное Предприятие "Буревестник" Method of x-ray luminescence separation of minerals
RU2517148C1 (en) * 2012-12-28 2014-05-27 Евгений Матвеевич Лукьянченко Method of useful material particles separation and device to this end
RU2521723C1 (en) * 2013-03-01 2014-07-10 Общество с ограниченной ответственностью "Нейтронные технологии" Method and apparatus for detecting diamonds in kimberlite
RU2754403C1 (en) * 2021-02-11 2021-09-02 Федеральное Государственное Бюджетное Учреждение Науки Институт Проблем Комплексного Освоения Недр Им. Академика Н.В. Мельникова Российской Академии Наук (Ипкон Ран) Method for extraction of diamonds from ores and industrial products

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2138503C (en) * 1993-12-22 2004-10-12 Ulf Anders Staffan Tapper Method and apparatus for the classification of particulate matter

Also Published As

Publication number Publication date
GB9704354D0 (en) 1997-04-23
RU2151409C1 (en) 2000-06-20
GB2310927B (en) 1999-09-22
AU707986B2 (en) 1999-07-22
GB2310927A (en) 1997-09-10
AU1506797A (en) 1997-09-11
CA2198990C (en) 2007-06-05

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