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

o the otherwise possible separation of the aerosol particle at surfaces of the chamber, on the other hand. The thoron progenies which mainly accumulate on the aerosol particles, shall be measured analogously by measuring the radon progenies after their separation by means of wire meshes (free fraction) or filters (fraction attached on aerosol partiles) in a follow-up product measuring set-up. By simultaneous spectrometry of the α- and γ-radiation emitted from the sample, quantifying of all thoron progenies as well as traceability of the measurement to the national activity standard is guaranteed.

2. Improvements of low-level gamma-ray Spectrometry Systems at UDO

Abstract: The Physikalisch-Technische Bundesanstalt (PTB), the German metrology institute, operates various low-background gamma-ray spectrometry systems at the underground laboratory (UDO) in the Asse salt mine, near Braunschweig. The experiences gained with these detector systems within ten years of operation lead to various changes and improve-ments of the experimental installations. In 2004, the whole UDO facility had to be moved within the Asse mine from its former location at a depth of 925 m to the present depth of 490 m. At its new location, the radon activity concentration in air (about 60 Bq/m3) is by a factor of three higher than at the 925 m level. Therefore, it became necessary to signifi-cantly improve the shielding against radon, at least for the most sensitive detector system. This radon shield consist of an almost air-tight box which surrounds the whole passive shielding (the latter is composed of 20 cm of lead and 10 cm of electrolytic copper). In addi-tion, an improved nitrogen flashing of the inner volume of the detector chamber was realized by changes of the design. At the same time, the end-cap of this detector was exchanged with the aim to reduce the inherent background of the system (especially from 40K). The background characteristics achieved wit
'/>"/>

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:4/15/2014)... associate professor of mechanical engineering at Worcester ... the university,s Integrative Materials Design Center (iMdc), ... from leading engineering societies. , At its ... global association of more than 138,000 engineers ... aerospace, and commercial vehicle industries, presented Lados ...
(Date:4/15/2014)... who study the deadliest infectious diseases recognized the contributions ... at the University of Texas Medical Branch, with a ... on Filoviruses. The filoviruses include Ebola and Marburg viruses ... people infected. The current outbreak of Ebola virus raging ... so far. , "This award represents the culmination ...
(Date:4/15/2014)... Md. (April 15, 2014) The American Association ... award winners. All awards will be presented during ... Diego Marriott Hotel on Tuesday, April 29th at 7:30 ... (EB). , The 2014 award winners are: ... Jeffrey Laitman, PhD, of the Icahn School of Medicine ...
Breaking Biology News(10 mins):WPI's Diana Lados honored by SAE International and Minerals, Metals, and Materials Society 2WPI's Diana Lados honored by SAE International and Minerals, Metals, and Materials Society 3WPI's Diana Lados honored by SAE International and Minerals, Metals, and Materials Society 4WPI's Diana Lados honored by SAE International and Minerals, Metals, and Materials Society 5International research group recognizes UTMB experts 2International research group recognizes UTMB experts 3American Association of Anatomists 2014 award winners 2
... in the Archives of General Psychiatry, researchers at the ... the first time molecular circuitry associated with schizophrenia that ... "This is very exciting because until now the many ... connected in any way," says Akira Sawa, M.D., Ph.D., ...
... color, their knobby knees or their big feet to their children ... through those same genes. New research from the University of ... herpes virus 6 (HHV-6) to their children because it is integrated ... been shown to become part of the human DNA and then ...
... and other hoofed animals, new research suggests that, when ... study, published today in the open access journal ... wolves will reduce deer hunting activity and instead focus ... Victoria and the Raincoast Conservation Foundation, Canada, led a ...
Cached Biology News:Hopkins researchers piece together gene 'network' linked to schizophrenia 2Hopkins researchers piece together gene 'network' linked to schizophrenia 3Virus weaves itself into the DNA transferred from parents to babies 2Wolves would rather eat salmon 2
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA ... disease. One of these latent viruses is the Epstein ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic ... by the theory, a study found that RA patients ... (1). , What is Microcompetition? , Dr. Hanan ...
(Date:1/15/2014)... Sunnyvale, CA (PRWEB) January 15, 2014 ... of high throughput research solutions, today announced that ... companies, has received delivery of Freeslate’s CM ... form screening. , Lupin, headquartered in Mumbai, ... quality, affordable generic and branded formulations and Active ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, ... Foundation, the only national nonprofit organization solely dedicated to ... quality of life for those affected worldwide, will host ... Warrington Country Club in Warrington, Pa. , Each ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider ... major scientific, regulatory, business, and media events in ... , today announced its former associate Virginia Cox , ... office. Virginia Cox re-joins ... Commissioner for the Office of External Affairs at the U.S. ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2
... Inc.,(Nasdaq: NVAX ) and the ... a preclinical study of a Respiratory Syncytial Virus ... rights from the, University of Massachusetts Medical School ... of Paramyxovirus vaccines incorporating,certain Virus-Like-Particles ("VLPs"). This ...
... announced as the recipient of a $750,000 investment by the Michigan ... ... Wire EON) December 9, 2008 -- Invest Michigan!, a program ... one of only two companies to receive capital in its first ...
... Dec. 9 First Coast Service Options (FCSO) has ... reimbursement solutions, to support a new Medicare contract awarded ... (CMS). , , Under ... Jan. 1, 2009 between health care providers and organizations ...
Cached Biology Technology:NOVAVAX and the University of Massachusetts Medical School Announce Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate 2NOVAVAX and the University of Massachusetts Medical School Announce Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate 3NOVAVAX and the University of Massachusetts Medical School Announce Preclinical Study Results for a Respiratory Syncytial Virus ('RSV') Vaccine Candidate 4 EcoSphere(R) Biolatex(TM) Secures Funding from Granholm and Invest Michigan! 2FCSO Selects Burgess as Exclusive Pricing Solution for New Medicare Contract 2
... Agencourt offers quick turnaround sequencing of ... copy and high copy plasmids. Agencourt's world-class, ... million Phred20 bases per day. The ... Sequencing service are 24 48 hour ...
Great for biotinylating DNA/RNA probes...
...
...
Biology Products: