Zobrazeno 1 - 10
of 26
pro vyhledávání: '"W. D. Whitehead"'
Autor:
W. D. Whitehead
Publikováno v:
Acta Crystallographica Section A Foundations of Crystallography. 53:251-251
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 17:335-349
A new method employing a variable length, time-of-flight mass spectrometer has been developed to measure dissociative life-times of quasi-stable doubly charged molecular ions. The method was used to measure the dissociative life-time of CO 2+ produce
Autor:
L. N. Bolen, W. D. Whitehead
Publikováno v:
Physical Review. 132:2251-2254
The absolute ( gamma ,n) cross sections of natural silicon, phosphorus, and sulfur were measured using the bremsstrahlung from a 70-Mev synchrotron. Yield points were taken at 0.5-Mev intervals from 12 to 30 Mev in each case. The absolute measurement
Publikováno v:
Physical Review. 118:535-539
Using a Halpern-type photoneutron detection system, the photoneutron yields from Li, N/supo 14/, and Ar/sup 40/ were measured as a function of the maximum bremsstrahlung energy from threshold to approximately 50 Mev. The method of Perfold and Deiss w
Publikováno v:
Physical Review A. 4:602-609
Autor:
S. C. Snowdon, W. D. Whitehead
Publikováno v:
Physical Review. 90:615-618
The total neutron cross sections of gold, chlorine, and phosphorus have been measured over the energy range 100 to 700 kev using the mono-energetic neutrons from the ${\mathrm{H}}^{3}(p, n){\mathrm{He}}^{3}$ reaction with an energy resolution of abou
Publikováno v:
Journal of the American Ceramic Society. 43:634-640
The Xe133 was produced by irradiation of UO2, which formed the central or core portion of small disks made from a 66% nickel and 34% MgO cermet material. Diffusion rates through this material were determined at 800 to 1100°C. The activation energy f
Publikováno v:
Physical Review. 75:1147-1154
The protons resulting from the deuteron bombardment of ${\mathrm{C}}^{12}$ have been studied in some detail, with particular emphasis on the variation of the intensity of the long-range protons with energy and angle. Excitation curves at three fixed
Publikováno v:
The Journal of Chemical Physics. 57:3120-3129
The total and relative abundances of thermal energy ions produced by absorption of 0.28, 1.25, and 1.5 keV x rays in N2, O2, NO, CO, and CO2 and the dissociative ionization cross sections at these energies were measured using a mass‐spectrometric t
Publikováno v:
Physical Review. 120:1424-1428
The total photoneutron yields of Mn/sup 55/ and Co/sup 59/ were measured from threshold to approximately 30 Mev. Analysis of these data using the Leiss- Penfold matrix indicated that the cross sections for both elements show a splitting in the giant