Zobrazeno 1 - 10
of 161
pro vyhledávání: '"R.H. Howell"'
Publikováno v:
Philosophical Magazine Letters. 82:609-615
The sensitivity of positrons to nanometre-size Cu precipitates in Fe alloys has enabled us to apply a novel spin-polarized element-specific method to probe the composition and magnetic character of...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48b8384c0e0bf9cb0192875e728351c6
https://doi.org/10.1080/0950083021000019958
https://doi.org/10.1080/0950083021000019958
Publikováno v:
Computational Materials Science. 10:306-313
We provide two examples to illustrate how electronic structure calculations contribute to our understanding of vacancies and their role in determining materials properties. Diffusion and electromigration in aluminium are known to depend strongly on v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40a5ce7aa8ffe225389885d6fd8a184a
https://doi.org/10.1016/s0927-0256(97)00180-8
https://doi.org/10.1016/s0927-0256(97)00180-8
The objective of this work is to determine the chemical composition of nanometer precipitates responsible for irradiation hardening and embrittlement of reactor pressure vessel steels, which threaten to limit the operating lifetime of nuclear power p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61d5caa55722430b00ca105d1d815664
https://doi.org/10.2172/15014066
https://doi.org/10.2172/15014066
An improved understanding of dislocation dynamics and interactions is an outstanding problem in the multi scale modeling of materials properties, and is the current focus of major theoretical efforts world wide. We have developed experimental and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8664dee60843b5d892b888d0954d274b
https://doi.org/10.2172/793454
https://doi.org/10.2172/793454
We have made the first measurement of defects in an aged sample of {delta} phase, Ga stabilized Pu, using positron annihilation lifetime spectroscopy. This measurement validates the procedure necessary to perform measurements on this highly toxic mat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9de2a4eef78c76ea8ac2bf6ef185cddd
https://doi.org/10.2172/491854
https://doi.org/10.2172/491854
Autor:
W.D. Mosley, H. Radousky, K. Ralls, P.A. | Sterne, R.H. Howell, A. Chaiken, J.W. Dykes, M.J. Fluss
We report here the completion of a one year project to investigate the synthesis, electronic structure, defect structure, and physical transport properties of high temperature superconducting oxide materials. During the course of this project we prod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17fef8641fc19800a85370f7ccf097ab
https://doi.org/10.2172/93594
https://doi.org/10.2172/93594
Autor:
R.H. Howell
A series of descriptive papers and graphics appropriate for distribution to potential collaborators has been assembled. These describe the capabilities for defect analysis using positron annihilation spectroscopy. The application of positrons to prob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51d3023e1648ae70bea4ae01d401398e
https://doi.org/10.2172/113995
https://doi.org/10.2172/113995
Publikováno v:
Nuclear Physics A. 383:355-391
New data for the elastic and inelastic scattering of 24.4 MeV protons from 6, 7Li are presented and a summary of all the available data for the elastic, inelastic, and charge exchange scattering of 24–50 MeV protons from these same targets is given
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5062099ba79cb141b3fdcd898efcbb6f
https://doi.org/10.1016/0375-9474(82)90083-5
https://doi.org/10.1016/0375-9474(82)90083-5
Publikováno v:
Physical Review C. 21:1153-1157
An out-of-plane ( p,p'..gamma..) angular correlation measurement has been made to determine the spin-flip contribution to the ( p,p') cross sections for the 1/sup +/, T=0 (Q=-12.71 MeV) and 1/sup +/, T=1 (Q=-15.11 MeV) excitations in /sup 12/C at pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcce514ad43c7f00eb57d48e3b9897cb
https://doi.org/10.1103/physrevc.21.1153
https://doi.org/10.1103/physrevc.21.1153
Publikováno v:
Physical Review C. 21:1158-1161
Angular distributions have been measured for the de-excitation gamma rays from the isoscalar and isovector 1/sup +/ states populated in the /sup 12/C( p,p') reaction at E/sub p/(lab) =22--27 MeV. Fluctuations in the A/sub 0/ coefficients, which measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ae758c510eec4569ab1769a51f9b91e
https://doi.org/10.1103/physrevc.21.1158
https://doi.org/10.1103/physrevc.21.1158