scholarly journals The IAEA 14C Intercomparison Exercise 1990

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 506-519 ◽  
Author(s):  
Kazimierz Rozanski ◽  
Willibald Stichler ◽  
Roberto Gonfiantini ◽  
E. M. Scott ◽  
R. P. Beukens ◽  
...  

As a follow-up to the meeting of experts convened at the International Atomic Energy Agency (IAEA) in February 1989, and the International 14C Workshop held in Glasgow in September 1989, the 14C Quality Assurance Program was formulated. In a joint effort of several radiocarbon teams and IAEA staff, we have prepared a set of five new intercomparison materials. These are natural materials frequently used by radiocarbon laboratories. The materials were distributed to 137 laboratories in May 1990. In February 1991, a meeting of experts was convened in Vienna to evaluate the results, to determine the radiocarbon activity of the five samples expressed in % Modern (pMC) terms and to define the 13C/12C ratio, and to make recommendations on further use of these materials. We present here the results of the exercise and the agreed consensus values for each of the five materials and discuss the different analyses that were undertaken.

Radiocarbon ◽  
1990 ◽  
Vol 32 (3) ◽  
pp. 393-397 ◽  
Author(s):  
Austin Long

The purpose of this Quality Assurance (QA) protocol is to summarize guidelines that have been accepted by directors of many radiocarbon dating laboratories throughout the world, and by the International Atomic Energy Agency (IAEA). Some laboratories have followed similar procedures successfully for years. Laboratories that carefully adhere to this protocol will produce consistently reliable data that will be comparable in accuracy to all other laboratories following this or any other equally rigorous quality assurance program. This statement does not, however, pertain to samples with 14C activities highly sensitive to method or degree of pretreatment, as pretreatment techniques vary among laboratories.


Radiocarbon ◽  
1990 ◽  
Vol 32 (1) ◽  
pp. 109-112 ◽  
Author(s):  
Austin Long

The purpose of this Quality Assurance (QA) protocol is to summarize guidelines that have been accepted by the majority of directors of radiocarbon dating laboratories throughout the world, and by the International Atomic Energy Agency (IAEA). Laboratories that carefully adhere to this protocol will produce consistently reliable data which will be comparable in accuracy to all other laboratories following this or any other equally rigorous quality assurance program. This statement does not, however, pertain to samples with 14C activities highly sensitive to method or degree of pretreatment, as pretreatment techniques vary among laboratories.


2018 ◽  
Vol 4 (Supplement 2) ◽  
pp. 150s-150s
Author(s):  
D. Paez ◽  
E. Zubizarreta ◽  
M. Abdel-Wahab ◽  
A. Polo

Background and context: In 2012, 560,000 women were diagnosed with cervical cancer (CXCA) worldwide and 266,000 women died of the disease: 86% of cases and 88% of deaths occurred in low- and middle-income countries (LMICs), and two thirds of the cases are locally advanced. For locally advanced CXCA the evidence-based treatment is a combination of external beam radiotherapy with chemotherapy and brachytherapy. Five-year overall survival for all stages combined ranges between 60%-69%, depending on the case-mix and the treatment modalities used. Countries with no access to radiotherapy may only offer palliative treatment to women diagnosed with locally advanced cervical cancer. Any curative attempt for these patients should include the two components of radiotherapy: concomitant radio-chemotherapy and brachytherapy. Radiotherapy is also a cost-effective treatment modality. Aim: To show the contribution and impact of the International Atomic Energy Agency (IAEA) to the improvement of results of CXCA in LMICs. Strategy/Tactics: Through its various programs, such as the Technical Cooperation programs, the Human Health program and the Program of Action for Cancer Therapy, the IAEA is committed to address these disproportionate geographic incidence and mortality rates introducing, expanding and improving radiotherapy services, working with partners such as WHO to improve cancer diagnosis, treatment, care, and control through collective action in these countries. Program/Policy process: During the last six decades, the IAEA has helped in addressing the growing cancer burden, delivering cancer-related assistance to LMICs, with financial and in-kind support from member states, donors and partners. The IAEA assistance has been primarily facilitated through the deployment of robust radiotherapy and nuclear medicine programs, coordinated research activities, documentation system and quality assurance program. This has enabled many member states to establish safe and effective diagnostic imaging and radiation therapy capacity to provide treatment and higher quality care to many of their cancer patients. The Program of Action for Cancer Therapy (PACT) is the IAEA's umbrella program for combating cancer and builds upon the above experience in radiation medicine expertise and technology. The WHO-IAEA Joint Program enable LMI member states to introduce, expand and improve their cancer treatment capacities and therapeutic effectiveness by integrating radiotherapy into a comprehensive national cancer control program. Outcomes: The IAEA provides tools for improving the practice of radiation medicine around the world. A fully implemented department (megavoltage and afterloading units, trained staff and quality assurance procedures in place) can treat up to 666 new CXCA cases per year, of which around 70% (466) can be cured. What was learned: Investing in radiotherapy can save lives!


Radiocarbon ◽  
2021 ◽  
pp. 1-12
Author(s):  
G Quarta ◽  
M Molnár ◽  
I Hajdas ◽  
L Calcagnile ◽  
I Major ◽  
...  

ABSTRACT The application of accelerator mass spectrometry radiocarbon (AMS 14C) dating in forensics is made possible by the use of the large excursion of the 14C concentration in the post-WWII terrestrial atmosphere due to nuclear testing as a reference curve for data calibration. By this approach high-precision analyses are possible on samples younger than ∼70 years. Nevertheless, the routine, widespread application of the method in the practice of forensics still appears to be limited by different issues due to possible complex interpretation of the results. We present the results of an intercomparison exercise carried out in the framework of an International Atomic Energy Agency (IAEA) CRP-Coordinated Research Project between three AMS laboratories in Italy, Hungary, and Switzerland. Bone and ivory samples were selected with ages spanning from background (>50 ka) to 2018. The results obtained allow us to assess the high degree of reproducibility of the results and the remarkable consistency of the experimental determinations.


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