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56 results on '"Gamma rays -- Measurement"'

2. Inspection Of The Groundwater Measuring Point At The Faulenberg Landfill - City Of Wrzburg

Subjects
Water, Underground -- Measurement -- Inspection, Refuse and refuse disposal -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Tenders are invited for inspection of the groundwater measuring point at the faulenberg landfill - city of wrzburg Investigation and geophysical borehole measurement at 13 groundwater measuring points at the [...]

Published
2024

5. Rare cosmic event captured with unrivalled detail; Small Chinese telescope provides most accurate measurements of collapsed star’s main bursts

Author

Xin, Ling

Subjects
Nuclear energy -- Measurement, Telescope -- Measurement, Nuclear industry -- Measurement, Gamma rays -- Measurement, News, opinion and commentary
Abstract

A Chinese-led team employed devotion to science, ­experience and timing to detect data from a once-in-a-thousand-year cosmic explosion with unprecedented accuracy, according to the researchers and an outside expert. About [...]

Published
2023

8. The determination of molecular scattering differential cross sections for compounds of some essential elements at 3.38 [Å.sup.-1] photon momentum transfer

Author

Akca, Burcu and Erzeneoglu, Salih

Subjects
Photons -- Properties, Gamma rays -- Measurement, Physics
Abstract

Molecular scattering differential cross sections of 59.5 keV γ-rays have been measured for some compounds of Na, Mg, Al, Ca, and Fe elements at 90°. The γ-rays of Am-241 were counted using a Si(Li) detector of EDXRF (energy dispersive X-ray fluorescence) system. The experimental results have been compared with non-relativistic and relativistic theoretical values. Key words: essential elements, molecular scattering differential cross sections, energy dispersive X-ray fluorescence system. Nous mesurons les sections efficaces differentielles pour des molecules bombardees par rayons γ de 59.5 keV, pour des composes de Na, Mg, Al, Ca et Fe a 90°. Les rayons γ emanant de 241Am sont comptes par un detecteur Si(Li) d'un systeme EDXRF (analyse dispersive en energie en fluorescence X). Nos resultats experimentaux sont compares a des valeurs theoriques non relativistes et relativistes. [Traduit par la Redaction] Mots-cles: element essentiel, section efficace differentielle moleculaire, analyse dispersive en energie en fluorescence X. PACS Nos.: 32.90.+a, 32.30.-r, 32.10.-f, 33.20.-t, 34.50.-s, 33.15.-e., 1. Introduction The coherent and incoherent scattering interaction of photons with matter is crucial for obtaining information about the characteristics and structure of samples. The scattering of γ-rays by atoms [...]

Published
2016
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10. The optical counterparts of gamma-ray bursts

Author

McNamara, Bernard J. and Harrison, Thomas E.

Subjects
Astronomical research -- Observations, Gamma rays -- Measurement, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Astronomers have puzzled about the origin of gamma-ray bursts (GRB) for 25 years. New events have been discovered since 1991, at the rate of around one a day, although objects responsible for the outbursts could not be identified. GRBs can now be rapidly and accurately located since the launch of the BeppoSAX satellite in 1996. This has been followed by discoveries of x-ray and optical counterparts.

Published
1998

11. Supply & Warranty Of Radiometric Analysis System For Gross Gamma Radiation Measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Measuring instruments -- Measurement, Nuclear energy -- Measurement, Business, international
Abstract

Tenders invited for Supply & warranty of radiometric analysis system for gross gamma radiation measurement. Document Download Start Date & Time:13/08/2020 16:30:00 Document Download/Tender Fee(if any) End Date & Time(Last [...]

Published
2020

12. Supply & Warranty Of Advanced Digital Count Rate Meter For Gamma Radiation Measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Nuclear energy -- Measurement, Business, international
Abstract

Tenders invited for Supply & warranty of advanced digital count rate meter for gamma radiation measurement Document Download Start Date & Time:19/06/2020 17:30:00 Document Download/Tender Fee(if any) End Date & [...]

Published
2020

13. Photometry and spectroscopy of the GRB 970508 optical counterpart

Author

Castro-Tirado, Alberto J. and Gorosabel, Javier

Subjects
Astrophysics -- Observations -- Measurement, Gamma rays -- Measurement, Science and technology, Observations, Measurement
Abstract

An optical transient within the error box of the gamma ray burst GRB 970508 was imaged 4 hours after the event. It displayed a strong ultraviolet excess, and reached maximum brightness 2 days later. The optical spectra did not show any emission lines, and no variations on time scales of minutes were observed for 1 hour during the decline phase. According to the fireball and afterglow models, the intensity should rise monotonically before the observed optical maximum, but the data indicate that another physical mechanism may be responsible for the constant phase seen during the first hours after the burst., Gamma ray bursts (GRBs), brief flashes of cosmic high-energy photons, remain one of the most elusive mysteries for high-energy astrophysicists (1), mainly because we do not know how far away [...]

Published
1998

14. Limits on the emission of neutrons, gamma-rays, electrons and protons from Pons/Fleischmann electrolytic cells

Author

Salamon, M.H., Wrenn, M.E., Bergeson, H.E., Crawford, K.C., Delaney, W.H., Henderson, C.L., Li, Y.Q., Rusho, J.A., Sandquist, G.M., and Seltzer, S.M.

Subjects
Protons -- Measurement, Neutrons -- Measurement, Electrodes -- Usage, Cold fusion -- Research, Electrons -- Measurement, Electrolytic cells -- Usage, Gamma rays -- Measurement, Environmental issues, Science and technology, Zoology and wildlife conservation
Published
1990

15. Measurement of in-phantom neutron flux and gamma dose in Tehran research reactor boron neutron capture therapy beam line

Author

Bavarnegin, Elham, Sadremomtaz, Alireza, Khalafi, Hossein, and Kasesaz, Yaser

Subjects
Gamma rays -- Measurement, Dose-response relationship, Radiotherapy -- Methods, Health
Abstract

Byline: Elham. Bavarnegin, Alireza. Sadremomtaz, Hossein. Khalafi, Yaser. Kasesaz Aim: Determination of in-phantom quality factors of Tehran research reactor (TRR) boron neutron capture therapy (BNCT) beam. Materials and Methods: The [...]

Published
2016

16. Scintillation Logging Unit For Gross Gamma Radiation Measurement

Subjects
Radiation measurement -- Measurement, Logging -- Measurement, Gamma rays -- Measurement, Measuring instruments -- Measurement, Nuclear energy -- Measurement, Nuclear reactors, Radiation (Physics), Legal fees, Business, international
Abstract

Tenders invited for scintillation logging unit for gross gamma radiation measurement Document download start date & time:06/09/2019 12:30:00 Document download/tender fee(if any) end date & time(last date of tender fee [...]

Published
2019

18. Lot No. 1 mobile Radiological Laboratory For Detection And Localization Of Radioactive Sources, Radiation Hygienic Monitoring, Measurement Of Gamma Radiation Dose Rate In The Populated Areas Of The Observation Zone, Rapid Analysis Of Water Samples, Food

Subjects
Food -- Measurement, Gamma rays -- Measurement, Radiation (Physics), Business, international
Abstract

Request for quotations : lot no. 1 mobile radiological laboratory for detection and localization of radioactive sources, radiation hygienic monitoring, measurement of gamma radiation dose rate in the populated areas [...]

Published
2019

21. 450

Subjects
Gamma rays -- Measurement, Crab Nebula -- Observations -- Natural history, Copyrights, Astronomy
Abstract

The energy, in teraelectron volts, of gamma rays recently seen from the Crab Nebula. They are the most powerful gamma rays ever detected from an astrophysical source. Please Note: Illustration(s) [...]

Published
2019

22. Second-look surgery for colorectal cancer: the second time around

Author

Martin, Edward W., Jr. and Carey, Larry C.

Subjects
Gamma rays -- Measurement, Reoperation -- Evaluation, Colorectal cancer -- Patient outcomes, Health
Abstract

'Second-look surgery' is surgery performed at a preselected time interval following the initial, potentially curative surgery. The purpose is to remove any residual local cancer that may have grown since initial surgery before it is too large. Surgical removal of recurrent tumors in patients with colorectal cancer improves survival and can be performed with relative safety. Improved imaging techniques have permitted better selection of candidates for these second-look procedures, which has resulted in improved overall survival rates. A study was undertaken of 86 patients with colorectal cancer; all patients had extensive preoperative evaluation and were assessed using the radioimmunoguided surgery (RIGS) protocol system. With the RIGS protocol, the patient is given an injection of a radio-tagged antibody prior to surgery. At surgery, the patient is evaluated using an ultrasound device to detect concentrations of the antibody and to identify suspicious sites for biopsy. This is followed by immediate pathological study, and perhaps definitive surgery. Using traditional methods of surgical exploration, 33 patients with colorectal cancer were considered nonresectable, and 53 patients were identified as candidates for further surgery. However, when the protocol was used, only 40 patients were considered eligible for resection. Follow-up information on these three groups of patients indicated that, at two years, 95 percent of the patients identified using the RIGS protocol as resectable survived, compared with only 53 percent of the patients who were identified by exploration as resectable. Thirty-six percent of the patients considered nonresectable by both methods survived. At five years, the only survivors were in the group identified as resectable using the RIGS protocol. It is concluded that use of a radioimmunoguided surgery protocol can increase accuracy in identifying patients who will benefit from resection at the time of second-look surgery. (Consumer Summary produced by Reliance Medical Information, Inc.)

Published
1991

23. Spectral constraints on the redshift of the optical counterparts to the gamma-ray burst of 8 May 1997

Author

Metzger, M.R., Djorgovski, S.G., Kulkarni, S.R., Steidel, C.C., Adelberger, K.L., Frail, D.A., Costa, E., and Frontera, F.

Subjects
Gamma rays -- Measurement, Astrophysics -- Measurement, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The origin of the daily bursts of brief, intense gamma-ray bursts from random directions in space is unknown and the location of such bursts has remained a mystery. Spectroscopic observations show the distance of the source lying at a redshift of between 0.835 and 2.3, suggesting that some highly energetic gamma-ray bursts lie at cosmological distances.

Published
1997

24. The optical counterpart to the gamma-ray burst GRB70508

Author

Djorgovski, S.G., Metzger, M.R., Kulkarni, S.R., Odewahn, S.C., Gal, R.R., Pahre, M.A., Frail, D.A., Feroci, M., Costa, E., and Palazzi, E.

Subjects
Astrophysics -- Research, Gamma rays -- Measurement, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

A major problem in modern astrophysics is understanding the complexity of the gamma-ray burst phenomenon. Research has identified gamma-ray burst GRB970508 at optical wavelengths. A variable optical source has been identified that is the counterpart to GRB970508. The decline of the light source's luminosity is consistent with many relativistic fireball models for gamma-ray bursts.

Published
1997

25. Measurement of gamma radiation levels in soil samples from Thanjavur using a-ray spectrometry and estimation of population exposure

Author

Senthilkumar, B., Dhavamani, V., Ramkumar, S., and Philominathan, P.

Subjects
Radioisotope scanning -- Usage, Gamma rays -- Measurement, Health
Abstract

Byline: B. Senthilkumar, V. Dhavamani, S. Ramkumar, P. Philominathan This study assesses the level of terrestrial gamma radiation and associated dose rates from the naturally occurring radionuclides [sup] 232 Th, [...]

Published
2010

26. Supply Of Dosimeter Installations For Measuring The Gamma Radiation Dose Rate

Subjects
Nuclear power plants -- Measurement, Gamma rays -- Measurement, Measuring instruments -- Measurement, Nuclear energy -- Measurement, Business, international
Abstract

Tenders are invited for supply of dosimeter installations for measuring the gamma radiation dose rate Starting price (rub.) 9,930,975.09 Lot currency 643 Russian ruble Initial price of the lot in [...]

Published
2018

28. A Reference Site For Measuring The Dose Rate Of Gamma Radiation

Subjects
Radioactive pollution -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Request for quotations : A reference site for measuring the dose rate of gamma radiation. 1. Reference site for measuring the dose rate of gamma radiation. 1 pc. , 400 [...]

Published
2018

29. Estudio de la determinación del radón-222 en un monitor de radiación gamma ambiental en aerosoles por filtro de papel

Author

Ferragut Ballester, Antoni, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, and Blas del Hoyo, Alfredo de

Subjects
Radó -- Mesurament, Contaminació radioactiva, Raigs gamma -- Mesurament, Seguiment ambiental, Radon -- Measurement, Energies::Energia nuclear::Seguretat nuclear [Àrees temàtiques de la UPC], Gamma rays -- Measurement, Aerosols radioactius, Environmental monitoring, Radioactive pollution, Aerosols, Radioactive
Abstract

El gas radón es un gas noble presente en la atmosfera descendiente de la cadena del U-238. Su detección puede ser muy útil para generar alarmas de fugas radioactivas o niveles de concentración del mismo perjudiciales para la salud. Se pretende adaptar un equipo para la medición de la actividad específica en aerosoles del radón-222 a partir de la medición realizada de sus descendientes adheridos en los aerosoles, y la creación de un algoritmo para el cálculo automático de dicha concentración.

Published
2015

30. Estudio de la determinación del radón-222 en un monitor de radiación gamma ambiental en aerosoles por filtro de papel

Author

Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Blas del Hoyo, Alfredo de, Ferragut Ballester, Antoni, Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Blas del Hoyo, Alfredo de, and Ferragut Ballester, Antoni

Abstract

El gas radón es un gas noble presente en la atmosfera descendiente de la cadena del U-238. Su detección puede ser muy útil para generar alarmas de fugas radioactivas o niveles de concentración del mismo perjudiciales para la salud. Se pretende adaptar un equipo para la medición de la actividad específica en aerosoles del radón-222 a partir de la medición realizada de sus descendientes adheridos en los aerosoles, y la creación de un algoritmo para el cálculo automático de dicha concentración.

Published
2015

32. Supply Of Scintillation Logging Unit For Gross Gamma Radiation Measurement

Subjects
Radiation measurement -- Measurement, Logging -- Measurement, Gamma rays -- Measurement, Measuring instruments -- Measurement, Nuclear energy -- Measurement, Business, international
Abstract

Tenders invited for Supply of scintillation logging unit for gross gamma radiation measurement. Document Download Start Date & Time:17/11/2017 17:30:00 Document Download/Tender Fee(if any) End Date & Time(Last date of [...]

Published
2017

33. Atomic-Scale Length Standard

Subjects
Gamma rays -- Measurement, Distances -- Measurement, Science and technology, Measurement
Abstract

The unit of length has come a long way since the cubit (the distance from fingertip to elbow) was used in the ancient world. Naturally, this was not very useful [...]

Published
2000

34. Radiometer Type Pkc-at1319 (or Equivalent) For The Measurement Of Total Beta Activity In Air Samples And The Type Of Dosimeter Mks-at 6130 (or Equivalent) To Measure The Dose Rate Of Gamma Radiation

Subjects
Gamma rays -- Measurement, Measuring instruments -- Measurement, Business, international
Abstract

Tenders are invited for Radiometer type PKC-AT1319 (or equivalent) for the measurement of total beta activity in air samples and the type of dosimeter MKS-AT 6130 (or equivalent) to measure [...]

Published
2016

35. Supply Of Advanced Digital Count Rate Meter For Gamma Radiation Measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Tenders are invited for Supply Of Advanced Digital Count Rate Meter For Gamma Radiation Measurement. Tender Type: Open/Advertised Document Download / Sale Start Date: 15-Jul-2016 05:01 PM Document Download / [...]

Published
2016

36. Supply of Densitometer Instrument Required For Measurement Of Optical Density Of X-Ray & Gamma-Ray Radiograph Films

Subjects
Optical instruments -- Measurement, Gamma rays -- Measurement, Density -- Measurement, Measuring instruments -- Measurement, Business, international
Abstract

Tenders are invited for Supply of Densitometer Instrument Required For Measurement Of Optical Density Of X-Ray & Gamma-Ray Radiograph Films. Tender Type: Open/Advertised Tender Fee(INR): Rs.0.00 Document Download / Sale [...]

Published
2016

37. Supply of radiometric analysis system for gross gamma radiation measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Measuring instruments -- Measurement, Business, international
Abstract

Tenders are invited for supply of radiometric analysis system for gross gamma radiation measurement. No. of Material: 1 Schedule: Tender Preparation and Release of NIT: Start Date & Time: 17-06-2015 [...]

Published
2015

38. Supply of advanced digital count rate meter for gamma radiation measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Tenders are invited for Supply of advanced digital count rate meter for gamma radiation measurement No. of Material: 1 Schedule: Tender Preparation and Release of NIT: Start Date & Time: [...]

Published
2015

39. Advanced digital count rate meter for gamma radiation measurement

Subjects
Radiation measurement -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Tenders are invited for Advanced Digital Count Rate Meter For Gamma Radiation Measurement Product Category: Miscellaneous Tender Type: Open/Advertised Product Sub-Category: Advanced Digital Count Rate Meter For Gamma Radiation Measurement [...]

Published
2015

40. Neutron activation analysis of a penny

Author

Stevens, Richard E.

Subjects
Radioactivation analysis -- Research, Gamma rays -- Measurement, Physics -- Study and teaching, Physics
Abstract

Neutron activation analysis has been used for many years as an analysis tool and as an educational tool to teach students about nuclear properties. This article presents an exercise in the neutron activation analysis of a penny which, due to the simplicity of the resulting gamma-ray spectra, is appropriate for general physics classes. Students express a great deal of interest both in seeing the reactor in use as well as determining the composition of something that is familiar to them.

Published
2000

41. Upper limits on neutron and gamma-ray emission from cold fusion

Author

Gai, M., Rugari, S.L., France, R.H., Lund, B.J., Zhao, Z., Davenport, A.J., Isaacs, H.S., and Lynn, K.G.

Subjects
Gamma rays -- Measurement, Electrolytic cells -- Research, Neutrons -- Measurement, Time-of-flight mass spectrometry -- Analysis, Cold fusion -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Published
1989

42. The first visible burst

Author

Paczynski, Bohdan and Wijers, Ralph

Subjects
Gamma ray astronomy -- Research, Gamma rays -- Measurement, Astrophysics -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Gamma ray bursts were first discovered in 1973 and were described as rapid, sporadic, on-off flashes of high energy photons in the sky lasting for about 5 milliseconds to a few hours. The origin of these bursts are still unknown however, in 1992 the Burst and Transient Source Experiment (BATSE) instrument satellite BeppoSAX can detect burst optical transient or x-ray afterglow which can be visible within 1-3 hours giving astronomers adequate time to study.

Published
1997

43. Radiation detection: do you have the right equipment for the job?

Author

Lang, Erin

Subjects
Gamma rays -- Measurement, Radioactive substances -- Electric properties, Detectors -- Usage, Business, Business, general, Engineering and manufacturing industries
Abstract

[ILLUSTRATION OMITTED] Radiation detection has become increasingly applicable in industrial settings as technologies using radioactive materials have migrated into many new territories. Those who work with radioactive materials need special [...]

Published
2006

44. Patent Issued for Density Profile Measurement by Detecting Backscattered Radiation with Position-Sensitive Detector

Subjects
Thermo Fisher Scientific Inc. -- Intellectual property, Gamma rays -- Measurement, Detection equipment -- Measurement, Scientific equipment industry -- Intellectual property -- Measurement, Computers, News, opinion and commentary
Abstract

By a News Reporter-Staff News Editor at Computer Weekly News -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Kulik, Alex (Sugar Land, TX); Esin, Alexander [...]

Published
2015

45. Supply Of Advanced Digital Count Rate Meter For Gamma Radiation Measurement

Subjects
Nuclear radiation -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Tenders are invited for Supply Of Advanced Digital Count Rate Meter For Gamma Radiation Measurement (Detailed Technical Specifications Of The Item As Per The Annexure -1 Attached) Tender documents : [...]

Published
2013

46. Delivery apparatus for measuring X-ray and gamma radiation

Subjects
Nuclear radiation -- Measurement, Gamma rays -- Measurement, Business, international
Abstract

Prior Information Notice: Delivery of specialized equipment Delivery of specialized equipment Estimated value excluding VAT: 296 667 BGN Tender documents : T15104484.html 2013 Al Bawaba (Albawaba.com) Provided by Syndigate.info an [...]

Published
2013

47. A symphony in gamma major

Subjects
Gamma ray astronomy -- Research, Gamma rays -- Measurement, X-ray astronomy -- Research, Astronomical research -- Analysis
Published
1997

49. The (-est)

Subjects
Explosions -- Observations -- Measurement, Stars -- Observations -- Properties -- Measurement, Gamma rays -- Measurement
Abstract

When a star exploded 12.8 billion light-years away, it set the record for farthest-ever known gamma-ray burst. NASA's Swift satellite detected the blast, named GRB 080913, on September 13. Seeing [...]

Published
2008

50. 'Density Profile Measurement by Detecting Backscattered Radiation with Position-Sensitive Detector' in Patent Application Approval Process

Subjects
Thermo Fisher Scientific Inc. -- Intellectual property, Scientific equipment and supplies industry -- Intellectual property -- Measurement, Nuclear radiation -- Measurement, Detectors -- Measurement, Gamma rays -- Measurement, Computers, News, opinion and commentary
Abstract

By a News Reporter-Staff News Editor at Computer Weekly News -- A patent application by the inventors Kulik, Alex (Sugar Land, TX); Esin, Alexander Joseph (Sugar Land, TX); Baturin, Nikolay [...]

Published
2013

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