Uncertainties in internal gas counting

Autor: Lisa R. Karam, Lena Johansson, M Rodrigues, A Yunoki, Michael P. Unterweger

Publikováno v: Metrologia
Metrologia, 2015, 52 (3), pp.S156-S164. ⟨10.1088/0026-1394/52/3/S156⟩
Metrologia, IOP Publishing, 2015, 52 (3), pp.S156-S164. ⟨10.1088/0026-1394/52/3/S156⟩

International audience; The uncertainties in internal gas counting will be broken down into counting uncertainties and gas handling uncertainties. Counting statistics, spectrum analysis, and electronic uncertainties will be discussed with respect to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::975967a8ca7c1cded5a5cf1a285fa7cf
https://doi.org/10.1088/0026-1394/52/3/s156

Evidence against solar influence on nuclear decay constants

Autor: Karsten Kossert, Denis E. Bergeron, M. Marouli, P. De Felice, S. Bourke, L. Verheyen, M.W. van Rooy, M.-N. Amiot, François Bochud, H. Stroh, Stefaan Pommé, Timotheos Altzitzoglou, Ryan P. Fitzgerald, Youcef Nedjadi, Frédéric Juget, R. Van Ammel, M. Bruggeman, T. W. Jackson, Raphael Galea, S Courte, J. Golya, K.M. Ferreira, Aldo Fazio, V. Chisté, Branko Vodenik, Michael P. Unterweger, John Keightley, B.R.S. Simpson, Claude Bailat, W.M. van Wyngaardt, J. Paepen, H. Schrader, Matjaž Korun, Ole Nähle, M. I. Reinhard, C Michotte, A. Ceccatelli, Leticia S. Pibida, J. Lubbe, T. Buchillier, T. Roy, M.J. van Staden, Sean Collins, Mikael Hult

Publikováno v: Phys.Lett.B
Phys.Lett.B, 2016, 761, pp.281-286. ⟨10.1016/j.physletb.2016.08.038⟩
Physics letters. [Part B]
Physics Letters B, vol. 761, pp. 281-286
Physics Letters B, Vol 761, Iss C, Pp 281-286 (2016)
Physics Letters B

International audience; The hypothesis that proximity to the Sun causes variation of decay constants at permille level has been tested and disproved. Repeated activity measurements of mono-radionuclide sources were performed over periods from 200 day

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fba3a075d3d11d46474f457df50bef7e
https://hal.archives-ouvertes.fr/hal-01554115

Update of NIST half-life results corrected for ionization chamber source-holder instability

Autor: Michael P. Unterweger, Ryan P. Fitzgerald

Publikováno v: Appl Radiat Isot

As reported at the ICRM 2011, it was discovered that the source holder used for calibrations in the NIST 4πγ ionization chamber (IC) was not stable. This has affected a large number of half-life measurement results previously reported and used in c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd69d3755c3ee0fb78630516e58db071
https://doi.org/10.1016/j.apradiso.2013.11.017

A new large-area 2π proportional counting system at NIST

Autor: Michael P. Unterweger, J.M.R. Hutchinson, Lynne E. King

Publikováno v: Applied Radiation and Isotopes. 66:877-880

A new large-area gas flow multi-wire proportional counter has been developed to replace the large-area counting system that is currently in use at the National Institute of Standards and Technology (NIST) and several Department of Defense counting fa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::536691334c3cf92e33bfb8ba024c3950
https://doi.org/10.1016/j.apradiso.2008.02.079

Half-life measurements at the National Institute of Standards and Technology

Autor: Michael P. Unterweger

Publikováno v: Applied Radiation and Isotopes. 56:125-130

For nearly half a century the half-lives of many radionuclides have been measured with increasing precision. The results of these measurements for many long-lived radionuclides, such as 60Co, 137Cs, 85Kr, 133Ba, 207Bi, 152Eu, 154Eu, and 155Eu, have b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86af54a424c50c4ae5d0ea9586eb51b2
https://doi.org/10.1016/s0969-8043(01)00177-4