Zobrazeno 1 - 10
of 37
pro vyhledávání: '"David J. Vieira"'
Autor:
John M. O'Donnell, Robert C. Haight, Toshihiko Kawano, Aaron Couture, A. Chyzh, M. Krtička, John A. Becker, Robert S. Rundberg, Marian Jandel, Shea Mosby, David J. Vieira, Bayarbadrakh Baramsai, J. B. Wilhelmy, J. L. Ullmann, G. E. Mitchell, Ching-Yen Wu, Todd Bredeweg
Publikováno v:
Nuclear Data Sheets. 119:22-25
A new measurement of the 238 U(n, γ ) cross section using a thin 48 mg/cm 2 target was made using the DANCE detector at LANSCE over the energy range from 10 eV to 500 keV. The results confirm earlier measurements. Measurements of the gamma-ray emiss
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 282:391-394
Lutetium has been used as a radiochemistry detector to measure neutron fluence in NTS tests. A measure of the neutron capture cross sections on 173Lu is needed to improve the interpretation value of the Lu radiochemistry isotopic ratios. A natural ha
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 282:365-368
A simple method for the electrodeposition of elemental arsenic (As) on a metal backing from aqueous solutions has been developed. The method was successfully applied to stable As (75As). Thin (2.5 mg cm−2) coherent, smooth layers of the metalloid o
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 276:533-542
Approximately one curie of 171Tm (T 1/2 = 1.92a) has been produced and purified for the purpose of making a nuclear target for the first measurements of its neutron capture cross section. Target preparation consisted of three key steps: (1) material
Publikováno v:
Journal of Alloys and Compounds. 418:189-194
High-purity chromatographic methods for separating five pairs of neighboring lanthanide elements (Tm/Er, Gd/Eu, Eu/Sm, Sm/Pm, and Pm/Nd) have been developed for the purpose of producing radioactive targets for neutron capture experiments. The methods
Autor:
V. Shishkin, Th. Kerscher, J. Stadlmann, M. B. Trzhaskovskaja, David J. Vieira, Helmut Weick, M. Falch, D. Boutin, P. Beller, Takashi Ohtsubo, L. Maier, H. Eickhoff, E. Kaza, M. Winkler, K. E. G. Löbner, M. Steck, B. Franczak, R. Koyama, F. Bosch, S. Watanabe, Wolfgang Quint, Yu. A. Litvinov, A. N. Ostrowski, B. Franzke, Toshio Suzuki, M. Portillo, Margareta Hellström, T. Yamaguchi, A. Ozawa, B. Pfeiffer, F. Nolden, Thomas Faestermann, Marc Hausmann, M. Matos, F. Attallah, K. Beckert, Hermann Wollnik, C. Scheidenberger, Ch. Kozhuharov, Karl Kratz, Yu. N. Novikov, O. Klepper, G. Münzenberg, Hans-Jürgen Kluge, Hans Geissel, M. Sümmerer, Torsten Radon, Zygmunt Patyk
Publikováno v:
Acta Physica Hungarica A) Heavy Ion Physics. 19:165-170
Recent progress in experiments with exotic nuclear beams at the SIS-FRS-ESR facility is summarized. New results on gross properties of exotic nuclei like binding energy, half-lives, and decay modes are presented. A brief outlook to future experiments
Publikováno v:
Applied Physics B: Lasers and Optics. 76:45-55
We report the first magneto-optical trapping of radioactive 135Cs and 137Cs and a promising means for detecting these isotopes at ultra-sensitive levels by coupling a magneto-optical trap (MOT) to a mass separator. A sample containing both isotopes w
Publikováno v:
Hyperfine Interactions. 127:387-393
We report on the trapping of radioactive atoms for a variety of nuclear, atomic, and applied physics investigations. To date we have trapped 5 different radioisotopes of rubidium and cesium (82–84Rb+135,137Cs) using a magneto-optical trap (MOT) cou
Publikováno v:
Physical Review A. 60:4730-4733
We report on the hyperfine-structure measurements of the 5P{sub 1/2} and 5P{sub 3/2} states as well as the isotope shift of the D{sub 1} transition of radioactive {sup 82}Rb (t{sub 1/2}=75 s) atoms trapped in a magneto-optical trap. The systematic ef