Navigation Links
Radioactivity: Discover the lowest amounts with new methods
Date:9/16/2008

h an electrolytic copper end-cap equipped with a thin carbon epoxy entrance window are compared with results obtained after the change to a low-activity aluminum end-cap operated at the same detector.

In this paper, the performance of the low-level gamma-ray spectrometry systems at UDO will be described. It focuses on technical aspects and the experiences gained after changes and improvements of the most sensitive detector had been performed.

3. On Monte Carlo Simulation of HPGE Gamma-Spectrometry Systems

Abstract: A complete calibration of gamma-spectrometry systems cannot be achieved exclu-sively on the basis of experimental measurements. Comprehensive experimental calibration is especially difficult in the case of low-level measurements, when volume sources, for which a proper standard is unavailable, are measured in close to detector high efficiency configura-tions, favoring important nuclide specific coincidence-summing effects. In such cases Monte Carlo simulation methods are among the best tools available for complementing experimen-tal calibration.

A recent intercomparison of Monte Carlo codes used in gamma-ray spectrometry revealed surprising differences between the results of different codes [1]. In this work our experience in using GESPECOR and GEANT 3.21 to solve problems in gamma-ray spectrometry (with emphasis on low-level measurements) is reviewed. The focus is on the problems resulting from differences between the two codes. Several topics related to the physics database, to the simulation parameters and algorithms and to problem definition are discussed.

Differences in interaction cross sections applied in the two programs are pointed out and the consequences on the simulation results in various measurement configurations are dis-cussed.


'/>"/>

Contact: Dr. Dirk Arnold
dirk.arnold@ptb.de
Physikalisch-Technische Bundesanstalt (PTB)
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mass. Generals Warren Triennial Prize honors discoverers of microRNAs
2. How are herbicides discovered?
3. TGen and Washington University researchers discover new approach to treating endometrial cancer
4. Key discovered to cold tolerance in corn
5. Researchers discover atomic bomb effect results in adult-onset thyroid cancer
6. Unexpected large monkey population discovered
7. Munich researchers discover key allergy gene
8. Johns Hopkins scientists discover what drives the development of a fatal form of malaria
9. Mount Sinai researchers discover technology that silences genes
10. MSUs discovery of plant protein holds promise for biofuel production
11. Smithsonian scientists discover new bird species
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/vkzvcs/iris_biometrics ) ... Global Strategic Business Report" report to their offering. ... in US$ Thousands. The report provides separate comprehensive analytics for ... , Europe , Asia-Pacific ... Latin America . Annual estimates and ...
(Date:3/17/2015)... 17, 2015  MecklerMedia Corporation (OTCQX: MECK) announced ... service robots ever held in New ... May 11-13, 2015 at the Javits Convention Center. ... event include: Acorn Product Development; Axis NJ; c-Link ... Robotics; Littler; NewBotic Corporation; Neya Systems LLC; Reliabotics; ...
(Date:3/12/2015)... , March 12, 2015 WHEN:Tuesday, March ... Registration here: http://bit.ly/1G7Os0L . SPEAKERS: , Frost ... SeshagiriPhoto - http://photos.prnewswire.com/prnh/20150311/181111 Biometric ... to compete in several different markets and industries. ... currently witnessing an uptrend. Join ...
Breaking Biology News(10 mins):Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 2Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 4Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 5MecklerMedia's RoboUniverse New York Announces Sponsors and Exhibitors, May 11-13, 2015 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 3
... be brought back from the brink with help from ... Kerrie Mengersen, from the School of Mathematical Sciences, is ... the Indonesian primate whose name means "person of the ... a quarter of villagers who lived side-by-side with orangutans ...
... /PRNewswire/ -- PAREXEL International Corporation ... services provider, today announced that it reached a milestone ... during the past three years.  The studies, which were ... more than 3,000 patients.   Early phase studies conducted ...
... results from a study by neuroscientists at Rush University Medical ... exhibit a specific structural change in the brain that can ... identify those who would most benefit from early intervention. ... meeting for the Society of Neuroscience in San Diego, Calif., ...
Cached Biology News:Orangutans count on stats for survival 2PAREXEL Completes 200 Patient Studies In Its Early Phase Units Over Three Years 2PAREXEL Completes 200 Patient Studies In Its Early Phase Units Over Three Years 3PAREXEL Completes 200 Patient Studies In Its Early Phase Units Over Three Years 4MRI scans show structural brain changes in people at risk for Alzheimer's disease 2
(Date:3/27/2015)... York (PRWEB) March 27, 2015 Governor ... 2015 application period for 43North - the world’s largest ... including a grand prize of $1 million, six $500,000 ... from around the world to compete for prizes that ... enterprises in the Western New York region. , ...
(Date:3/26/2015)... San Bruno, CA (PRWEB) March 26, 2015 ... organization (CRO), announced today several management and executive ... role of Chief Financial Officer (CFO) and member of ... Vice President of Business Operations, and Sue Dowden will ... Tony Taricco, co-founder and current Chief Operations Officer (COO), ...
(Date:3/26/2015)... The Market Element LLC, a leading ... with Designing Gig LLC to provide website design, development, ... “Forging this alliance with Designing Gig represents a pivotal ... a comprehensive, end-to-end, digital solution for our clients, which ... Chuck Miller, president of The Market Element. “For small ...
(Date:3/26/2015)... and CINCINNATI , March 26, ... SHP, NASDAQ: SHPG ) and Cincinnati Children,s ... research collaboration for rare diseases. The goal of the ... to treat rare diseases with high unmet medical ... Cincinnati Children,s research expertise. As a nationally ranked ...
Breaking Biology Technology:Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 2Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 3Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 4Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 5PRC Clinical Announces Key Management Appointments and Launches East Coast Operations 2PRC Clinical Announces Key Management Appointments and Launches East Coast Operations 3The Market Element LLC and Designing Gig LLC Form Strategic Alliance 2Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 2Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 3Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 4Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 5
... N.C. A genetic tool used by medical researchers may ... microbes and viruses from drinking water. , In a series ... of genetic material could successfully target a matching portion of ... make it stop working. If this new approach can be ...
... - YM BioSciences Inc.,(AMEX: YMI , TSX: ... and commercializes differentiated products for patients worldwide,today announced ... its,anti-cancer drug nimotuzumab, a humanized monoclonal antibody that ... the 2008 American,Society of Clinical Oncology (ASCO) Annual ...
... presentation at the 14th,International Conference on Prenatal Diagnosis and ... Diagnostic.,I.D.Rh(D) is the first in a series of noninvasive ... maternal blood sample., The I.D.Rh(D) test diagnoses the ... and can be performed as early as ten weeks ...
Cached Biology Technology:Possible new approach to purifying drinking water 2Possible new approach to purifying drinking water 3NIMOTUZUMAB CLINICAL DATA PRESENTED AT ASCO ANNUAL MEETING 2NIMOTUZUMAB CLINICAL DATA PRESENTED AT ASCO ANNUAL MEETING 3NIMOTUZUMAB CLINICAL DATA PRESENTED AT ASCO ANNUAL MEETING 4Presentation at the 14th International Conference on Prenatal Diagnosis and Therapy Highlights Biocept's I.D.Rh(D) Prenatal Diagnostic 2
E2F-5...
DAP12 Market Segment: Protein Kinases...
Rabbit polyclonal to Flagellin ( Abpromise for all tested applications). Antigen: Synthetic peptide from the flagellin C terminal domain of Burkholderia pseudomallei....
Naphthol Blue Black, CI 20470...
Biology Products: