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:10/1/2014)... microbes that thrive in the deserts, rainforests, prairies and ... beneath New York City,s Central Park, according to a ... the University of Colorado Boulder. , The research ... Park,s 843 acres and discovered a stunning diversity of ... before. , Only 8.5 percent to 16.2 percent ...
(Date:9/30/2014)... by the Ocean Health Index rates the Earth,s ... health. In addition, for the first time, the ... regions beyond national jurisdiction (high-seas areas) all ... biodiversity and providing sustainable food sources. , In ... partnership led by scientists from UC Santa Barbara,s ...
(Date:9/30/2014)... scientists and engineers, led by Clemson University associate ... million grant from the U.S. Department of Energy,s ... a direct positive impact on South Carolina in ... radioactive contaminants. , "Understanding the scientific and engineering ... aspects of nuclear technologies is imperative if South ...
Breaking Biology News(10 mins):Microbes in Central Park soil: If they can make it there, they can make it anywhere 2Microbes in Central Park soil: If they can make it there, they can make it anywhere 3Rating the planet's oceans 2Rating the planet's oceans 3Researchers get $5.25 million to advance nuclear technologies in South Carolina 2
... (March 5, 2013) Researchers have discovered that deleting a ... on a high fat diet, a finding they believe may ... induces obesity these mice don,t get fat," said Prof. James ... research for Obstetrics and Gynecology at the University of Colorado ...
... Center scientists report the first successful blocking of tumor development in ... my knowledge, this is the first time that a mouse model ... which the formation of the tumor from beginning to end can ... of the tumor," said Dr. Luis Parada , chair of ...
... 2013) Researchers at the University of Minnesota,s ... cellular reprogramming to generate stem cells capable of ... Muscular Dystrophy (DMD). The research, which ... pluripotent stem cell technology and genetic correction to ...
Cached Biology News:Researchers discover gene that causes obesity in mice 2UT Southwestern scientists make mouse model of human cancer, demonstrate cure 2UT Southwestern scientists make mouse model of human cancer, demonstrate cure 3U of M researchers utilize genetically corrected stem cells to spark muscle regeneration 2U of M researchers utilize genetically corrected stem cells to spark muscle regeneration 3
(Date:10/1/2014)... The participants committed to not only creating unique ... time adjusting, tweaking and testing virtual models and 3D ... judging. , “I enjoyed being involved as a judge,” ... entries showed a commendable range exploring the technical capabilities ... medium and the creativity of the contestants.” , Array ...
(Date:10/1/2014)... 30, 2014 New applications of structures ... have evolved in nature over millennia are featured in ... for applications in biophotonics in the October issue ... journal is published by SPIE, the international society for ... of the peer-reviewed articles are accessible via open access. ...
(Date:10/1/2014)... TeselaGen Biotechnology has received ... expand their bioCAD/CAM software suite, which uses synthetic ... Small Business Innovation Research Phase II grant will be ... license from the Lawrence Berkeley National Laboratory. j5 was ... LBNL laboratory that develops alternative fuel technologies for the ...
(Date:10/1/2014)... 2014 Industry leaders from ... engage around the theme, ,Commercial Opportunities in the Era ... Elsevier , a world-leading provider of ... host a gathering of some of the industry,s most ... healthcare today and in the future. The ...
Breaking Biology Technology:Array Architects Challenges Staff to Create with 3D Printer 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 3TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 2Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 3
... NicOx S.A.,(NYSE Euronext Paris: COX) today announced ... the commercial manufacture and supply of naproxcinod ... is NicOx, lead,investigational product and the first ... of,anti-inflammatory agents, which recently achieved positive results ...
... Sinovac Biotech Ltd. (NYSE Alternext,US: SVA), a leading provider of ... Fengtai District in the City of Beijing suspended,the use of ... of the death of a minor in the Fengtai District ... vaccine two days prior. , ...
... market research firm SharpBrains, will lead a webinar discussing the Top ... providers. , ... San Francisco, CA (PRWEB) December 2, ... World Economic Forum,s Council on the Challenges of Gerontology, will lead ...
Cached Biology Technology:NicOx Signs Agreement With DSM for the Commercial Manufacture of Naproxcinod Drug Substance 2NicOx Signs Agreement With DSM for the Commercial Manufacture of Naproxcinod Drug Substance 3NicOx Signs Agreement With DSM for the Commercial Manufacture of Naproxcinod Drug Substance 4Sinovac Releases Statement on Healive Vaccine Suspension 2Top 10 Cognitive Fitness Events of 2008 to be Unveiled at SharpBrains' Webinar 2Top 10 Cognitive Fitness Events of 2008 to be Unveiled at SharpBrains' Webinar 3
Mouse monoclonal [7B9] to beta II Tubulin ( Abpromise for all tested applications). Antigen: Synthetic peptide, CEEEEGEDEA found at the c-terminus of beta II tubulin. Entrez GeneID: 10383 ...
...
... used in conjuction with Annexin V-FITC to ... stages of apoptosis (Annexin V positive, PI ... stages of apoptosis or already dead (Annexin ... in the orange range of the spectrum ...
... were cultured in RPMI 1640 with 2 mM ... growth. In order to keep the antigens ... acetone-methanol. The cells are arrayed on a ... wells surface specifically treated to enhance cellular attachment ...
Biology Products: