Zobrazeno 1 - 10
of 206
pro vyhledávání: '"Casperson R."'
Autor:
Escher J. E., Tonchev A. P., Burke J. T., Bedrossian P., Casperson R. J., Cooper N., Hughes R. O., Humby P., Ilieva R. S., Ota S., Pietralla N., Scielzo N. D., Werner V.
Publikováno v:
EPJ Web of Conferences, Vol 122, p 12001 (2016)
Cross sections for compound-nuclear reactions involving unstable targets are important for many applications, but can often not be measured directly. Several indirect methods have recently been proposed to determine neutron capture cross sections for
Externí odkaz:
https://doaj.org/article/91b06c29ca444ef9aa4e1e567587ea24
Autor:
Delaune O., Blanc A., Burke J.T., Casperson R., Chau Huu-Tai P., McCleskey E., McCleskey M., Méot V., Roig O., Saastamoinen A.
Publikováno v:
EPJ Web of Conferences, Vol 93, p 02010 (2015)
We performed the 174Yb(p,d) reaction in order to measure the gamma-emission probability of 173Yb. The identification of the ejectiles — allowing us to tag the production of 173Yb nuclei — was performed using the STARLiTeR detector system. Unusual
Externí odkaz:
https://doaj.org/article/d8389ea8068f4007943d456cb604aaa6
Autor:
Snyder, L., Anastasiou, M., Bowden, N. S., Bundgaard, J., Casperson, R. J., Cebra, D. A., Classen, T., Dongwi, D. H., Fotiades, N., Gearhart, J., Geppert-Kleinrath, V., Greife, U., Hagmann, C., Heffner, M., Hensle, D., Higgins, D., Isenhower, L. D., Kazkaz, K., Kemnitz, A., King, J., Klay, J. L., Latta, J., Leal-Cidoncha, E., Loveland, W., Magee, J. A., Manning, B., Mendenhall, M. P., Monterial, M., Mosby, S., Neudecker, D., Prokop, C., Sangiorgio, S., Schmitt, K. T., Seilhan, B., Tovesson, F., Towell, R. S., Walsh, N., Watson, T. S., Yao, L., Younes, W.
The $^{239}$Pu(n,f)/$^{235}$U(n,f) cross-section ratio has been measured with the fission Time Projection Chamber (fissionTPC) from 100 keV to 100 MeV. The fissionTPC provides three-dimensional reconstruction of fission-fragment ionization profiles,
Externí odkaz:
http://arxiv.org/abs/2107.02881
Autor:
Monterial, M., Schmitt, K. T., Prokop, C., Leal-Cidoncha, E., Anastasiou, M., Bowden, N. S., Bundgaard, J., Casperson, R. J., Cebra, D. A., Classen, T., Dongwi, D. H., Fotiades, N., Gearhart, J., Geppert-Kleinrath, V., Greife, U., Hagmann, C., Heffner, M., Hensle, D., Higgins, D., Isenhower, L. D., Kazkaz, K., Kemnitz, A., King, J., Klay, J. L., Latta, J., Loveland, W., Magee, J. A., Manning, B., Mendenhall, M. P., Mosby, S., Neudecker, D., Sangiorgio, S., Seilhan, B., Snyder, L., Tovesson, F., Towell, R. S., Walsh, N., Watson, T. S., Yao, L., Younes, W.
We present the results of a measurement of isotopic concentrations and atomic number ratio of a double-sided actinide target with alpha-spectroscopy and mass spectrometry. The double-sided actinide target, with primarily Pu-239 on one side and U-235
Externí odkaz:
http://arxiv.org/abs/2106.06063
Autor:
Hensle, D., Barker, J. T., Barrett, J. S., Bowden, N. S., Brewster, K. J., Bundgaard, J., Case, Z. Q., Casperson, R. J., Cebra, D. A., Classen, T., Duke, D. L., Fotiadis, N., Gearhart, J, Geppert-Kleinrath, V., Greife, U., Guardincerri, E., Hagmann, C., Heffner, M., Hicks, C. R., Higgins, D., Isenhower, L. D., Kazkaz, K., Kemnitz, A., Kiesling, K. J., King, J., Klay, J. L., Latta, J., Leal, E., Loveland, W., Lynch, M., Magee, J. A., Manning, B., Mendenhall, M. P., Monterial, M., Mosby, S., Oman, G., Prokop, C., Sangiorgio, S., Schmitt, K. T., Seilhan, B., Snyder, L., Tovesson, F., Towell, C. L., Towell, R. S., Towell, T. R., Walsh, N., Watson, T. S., Yao, L., Younes, W.
Publikováno v:
Phys. Rev. C 102, 014605 (2020)
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has performed measurements with a fission time projection chamber (fissionTPC) to study the fission process by reconstructing full three-dimensional tracks of fission fra
Externí odkaz:
http://arxiv.org/abs/2001.09381
Autor:
Wang, B. S., Burke, J. T., Akindele, O. A., Casperson, R. J., Hughes, R. O., Koglin, J. D., Kolos, K., Norman, E. B., Ota, S., Saastamoinen, A.
Publikováno v:
Phys. Rev. C 100, 064609 (2019)
The average prompt-fission-neutron multiplicity $\bar{\nu}$ is of significance in the areas of nuclear theory, nuclear nonproliferation, and nuclear energy. In this work, the surrogate-reaction method has been used for the first time to indirectly de
Externí odkaz:
http://arxiv.org/abs/1906.04305
Autor:
Walsh, N. I., Barker, J. T., Bowden, N. S., Brewster, K. J., Casperson, R. J., Classen, T., Fotiadis, N., Greife, U., Guardincerri, E., Hagmann, C., Heffner, M., Hensle, D., Hicks, C. R., Higgins, D., Isenhower, L. D., Kemnitz, A., Kiesling, K. J., King, J., Klay, J. L., Latta, J., Loveland, W., Magee, J. A., Mendenhall, M. P., Monterial, M., Mosby, S., Oman, G., Sangiorgio, S., Seilhan, B., Snyder, L., Towell, C. L., Towell, R. S., Towell, T. R., Schmitt, K. T., Watson, S., Yao, L., Younes, W.
We provide a quantitative description of a method to measure neutron-induced fission cross sections in ratio to elastic hydrogen scattering in a white-source neutron beam with the fission Time Projection Chamber. This detector has measured precision
Externí odkaz:
http://arxiv.org/abs/1904.10558
Autor:
Ratkiewicz, A., Cizewski, J. A., Escher, J. E., Potel, G., Burke, J. T., Casperson, R. J., McCleskey, M., Austin, R. A. E., Burcher, S., Hughes, R. O., Manning, B., Pain, S. D., Peters, W. A., Rice, S., Ross, T. J., Scielzo, N. D., Shand, C., Smith, K.
The neutron-capture reaction plays a critical role in the synthesis of the elements in stars and is important for societal applications including nuclear power generation and stockpile-stewardship science. However, it is difficult - if not impossible
Externí odkaz:
http://arxiv.org/abs/1812.08887
Autor:
Casperson, R. J., Asner, D. M., Baker, J., Baker, R. G., Barrett, J. S., Bowden, N. S., Brune, C., Bundgaard, J., Burgett, E., Cebra, D. A., Classen, T., Cunningham, M., Deaven, J., Duke, D. L., Ferguson, I., Gearhart, J., Geppert-Kleinrath, V., Greife, U., Grimes, S., Guardincerri, E., Hager, U., Hagmann, C., Heffner, M., Hensle, D., Hertel, N., Higgins, D., Hill, T., Isenhower, L. D., King, J., Klay, J. L., Kornilov, N., Kudo, R., Laptev, A. B., Loveland, W., Lynch, M., Lynn, W. S., Magee, J. A., Manning, B., Massey, T. N., McGrath, C., Meharchand, R., Mendenhall, M. P., Montoya, L., Pickle, N. T., Qu, H., Ruz, J., Sangiorgio, S., Schmitt, K. T., Seilhan, B., Sharma, S., Snyder, L., Stave, S., Tate, A. C., Tatishvili, G., Thornton, R. T., Tovesson, F., Towell, D. E., Towell, R. S., Walsh, N., Watson, S., Wendt, B., Wood, L., Yao, L., Younes, W.
The normalized $^{238}$U(n,f)/$^{235}$U(n,f) cross section ratio has been measured using the NIFFTE fission Time Projection Chamber from the reaction threshold to $30$~MeV. The fissionTPC is a two-volume MICROMEGAS time projection chamber that allows
Externí odkaz:
http://arxiv.org/abs/1802.08721
Autor:
Geppert-Kleinrath, V., Tovesson, F., Barrett, J. S., Bowden, N. S., Bundgaard, J., Casperson, R. J., Cebra, D. A., Classen, T., Cunningham, M., Duke, D. L., Gearhart, J., Greife, U., Guardincerri, E., Hagmann, C., Heffner, M., Hensle, D., Higgins, D., Isenhower, L. D., King, J., Klay, J. L., Loveland, W., Magee, J. A., Manning, B., Mendenhall, M. P., Ruz, J., Sangiorgio, S., Schmitt, K. T., Seilhan, B., Snyder, L., Tate, A. C., Towell, R. S., Walsh, N., Watson, S., Yao, L., Younes, W., Leeb, H.
Publikováno v:
Phys. Rev. C 99, 064619 (2019)
Fission fragment angular distributions can provide an important constraint on fission theory, improving predictive fission codes, and are a prerequisite for a precise ratio cross section measurement. Available anisotropy data is sparse, especially at
Externí odkaz:
http://arxiv.org/abs/1710.00973