Zobrazeno 1 - 10
of 426
pro vyhledávání: '"KOEHLER, P. E."'
Autor:
Mercer, David J., Winkler, Ryan, Koehler, Katrina E., Becker, Daniel T., Bennett, Douglas A., Carpenter, Matthew H., Croce, Mark P., de Castro, Krystal I., Feissle, Eric A., Fowler, Joseph W., Gard, Johnathon D., Mates, John A. B., McNeel, Daniel G., Ortiz, Nathan J., Schmidt, Daniel, Schreiber, Katherine A., Swetz, Daniel S., Ullom, Joel N., Vale, Leila R., Weidenbenner, Sophie L., Wessels, Abigail L.
We report measurements of the 103-keV and 159-keV gamma ray signatures of 242Pu using microcalorimetry. This is the first observation of these gamma rays in a non-destructive measurement of an unprepared sample, and so represents an important advance
Externí odkaz:
http://arxiv.org/abs/2202.02933
Advances in both instrumentation and data analysis software are now enabling the first ultra-high-resolution microcalorimeter gamma spectrometers designed for implementation in nuclear facilities and analytical laboratories. With approximately ten ti
Externí odkaz:
http://arxiv.org/abs/2104.03376
Autor:
Koehler, Katrina E., Yoho, Michael D., Carpenter, Matthew H., Croce, Mark P., Mercer, David J., Smith, Chandler M., Tollefson, Aidan D., Vo, Duc T., Famiano, Michael A., Nesaraja, Caroline D., Becker, Daniel T., Gard, Johnathon D., Wessels, Abigail L., Bennett, Douglas A., Mates, J. A. B., Ortiz, Nathan J., Schmidt, Daniel R., Ullom, Joel N., Vale, Leila R.
With the high resolution of microcalorimeter detectors, previously unresolvable gamma-ray lines are now clearly resolvable. A careful measurement of Am-241 decay with a large array of gamma-ray microcalorimeters has revealed never before seen or pred
Externí odkaz:
http://arxiv.org/abs/2103.15893
Autor:
Croce, Mark P., Koehler, Katrina E., Mocko, Veronika, Hoover, Andrew S., Kozimor, Stosh A., Schmidt, Daniel R., Ullom, Joel N.
We report the first isotopic composition measurements of trinitite, nuclear detonation debris from the Trinity test, using the novel forensics technique of decay energy spectroscopy (DES). DES measures the unique total decay energy (Q value) of each
Externí odkaz:
http://arxiv.org/abs/2103.12215
Autor:
Mercer, D. J., Koehler, K. E., Croce, M. P., Hoover, A. S., Hypes, P. A., Kozimor, S. A., Mocko, V., Saey, P. R. J.
We report gamma ray spectroscopy measurements of trinitite samples and analogous samples obtained from detonation sites in Nevada and Semipalatinsk, as well as in situ measurements of topsoil at the Trinity site. We also report the first isotopic com
Externí odkaz:
http://arxiv.org/abs/2103.06240
Autor:
Tollefson, Aidan D., Smith, Chandler M., Carpenter, Matthew H., Croce, Mark P., Fassbender, Michael E., Koehler, Katrina E., Lilley, Laura M., O'Brien, Ellen M., Schmidt, Daniel R., Stein, Benjamin W., Ullom, Joel N., Yoho, Michael D., Mercer, David J.
225Ac is a valuable medical radionuclide for targeted alpha therapy, but 227Ac is an undesirable byproduct of an accelerator-based synthesis method under investigation. Sufficient detector sensitivity is critical for quantifying the trace impurity of
Externí odkaz:
http://arxiv.org/abs/2102.02813
Autor:
Yoho, Michael D., Koehler, Katrina E., Becker, Daniel T., Bennett, Douglas A., Carpenter, Matthew H., Croce, Mark P., Gard, Johnathon D., Mates, J. A. Ben, Mercer, David J., Ortiz, Nathan J., Schmidt, Daniel R., Smith, Chandler M., Swetz, Daniel S., Tollefson, Aidan D., Ullom, Joel N., Vale, Leila R., Wessels, Abigail L., Vo, Duc T.
Photon branching ratios are critical input data for activities such as nuclear materials protection and accounting because they allow material compositions to be extracted from measurements of gamma-ray intensities. Uncertainties in these branching r
Externí odkaz:
http://arxiv.org/abs/2005.10304
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Autor:
Koehler, Katrina E., Famiano, Michael A., Fontes, Chris J., Gorczyca, Thomas W., Rabin, Michael W., Schmidt, Dan R., Ullom, Joel N., Croce, Mark P.
The neutrino mass can be extracted from a high statistics, high resolution calorimetric spectrum of electron capture in ${}^{163}$Ho. In order to better understand the shape of the calorimetric electron capture spectrum, a second isotope was measured
Externí odkaz:
http://arxiv.org/abs/1803.06370
Autor:
Kheswa, Bonginkosi Vincent, Wiedeking, Mathis, Brown, Josh, Larsen, Ann-Cecilie, Goriely, Stephane, Guttormsen, Magne, Garrote, Frank L Bello, Bernstein, Lee A, Bleuel, Darren L., Eriksen, Tomas K, Giacoppo, Francesca, Görgen, Andreas, Goldblum, Bethany L, Hagen, Trine, Koehler, Paul E, Klintefjord, Malin, Malatji, Kgashane L, Midtbø, Jørgen E, Nyhus, Hilde-Therese, Papka, Paul, Renstrøm, Therese, Rose, Sunniva J, Sahin, Eda, Siem, Sunniva, Tornyi, Tamás
The nuclear level densities and $\gamma$-ray strength functions of $^{138,139,140}$La were measured using the $^{139}$La($^{3}$He, $\alpha$), $^{139}$La($^{3}$He, $^{3}$He$^\prime$) and $^{139}$La(d, p) reactions. The particle-$\gamma$ coincidences w
Externí odkaz:
http://arxiv.org/abs/1701.03712