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01 Feb 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: Three methods of standardizing 125I have been compared and it is concluded that systematic differences, if any, between the results of the methods are ≤ 0.2%.
Abstract: Three methods of standardizing 125I have been compared: (1) sum-peak coincidence counting with a Ge detector, (2) X-ray-X-ray coincidence counting, and (3) 4πe-X coincidence counting with efficiency extrapolation. The object of the study was to look for any evidence at the 0.1% level of systematic differences in the derived activity concentration. Enough data were accumulated to reduce the statistical uncertainties for methods (2) and (3) to 0.05%. It is concluded that systematic differences, if any, between the results of the methods are ≤ 0.2%.
25 citations
TL;DR: In this article, the effects of organic horizon removal, ashes, soil water, and shade on jack pine (Pinus banksiana Lamb) seedling emergence were investigated. But they did not consider the effect of weeds.
Abstract: The effects of organic horizon removal, ashes, soil water, and shade on jack pine (Pinus banksiana Lamb) seedling emergence were investigated. For this purpose soil monoliths were taken to the laboratory and received prescribed burning, leading to 100%, 75%, 50%, 25%, and 0% organic horizon removal. One half of each monolith contained ashes generated from burning whereas the other half was kept ash-free. Each half of every monolith was sown with jack pine seeds and the monoliths were then watered under four watering schedules (100%, 75%, 50%, and 25% of the regional average daily June rainfall) or shaded under four shading levels (100%, 75%, 50%, and 25% photosynthetically active radiation). Seedling emergence was most successful under high watering schedules, increased depth of burn, high shading, and without ashes. Ash had an inhibitory effect on seedling emergence.
24 citations
24 citations
TL;DR: In this paper, the atomic vibrations in a single crystal of Cu-3 at.% Au have been studied using inelastic neutron scattering and the line shapes and widths of the neutron groups, and the shifts from the corresponding frequencies for the host (pure copper), agree substantially with calculations based on the theory of Elliott and Maradudin, but appear to show slight deviations which are in the same direction as, but much less marked than, those exhibited by the results of previous measurements on single crystals of Cu 9.3 at.
Abstract: The atomic vibrations in a single crystal of Cu-3 at.% Au have been studied using inelastic neutron scattering. The line shapes and widths of the neutron groups, and the shifts from the corresponding frequencies for the host (pure copper), agree substantially with calculations based on the theory of Elliott and Maradudin, but appear to show slight deviations which are in the same direction as, but much less marked than, those exhibited by the results of previous measurements on single crystals of Cu-9.3 at.% Au.
24 citations
TL;DR: In this article, a study was set up in pine mixedwood forests within the Petawawa Research Forest, near Chalk River, Ontario, Canada to investigate increasing the growth, yield and quality of eastern white pine (Pinus strobus L).
24 citations
Authors
Showing all 2298 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Michael D. Guiver | 78 | 288 | 20540 |
| Robert J. Birgeneau | 78 | 587 | 22686 |
| Mike D. Flannigan | 71 | 211 | 21327 |
| Martin T. Dove | 61 | 396 | 14767 |
| Luis Rodrigo | 58 | 341 | 12963 |
| André Longtin | 56 | 260 | 16372 |
| David Mitlin | 56 | 196 | 15479 |
| John Katsaras | 55 | 220 | 9263 |
| John E. Greedan | 55 | 391 | 12171 |
| Gang Li | 48 | 406 | 7713 |
| Matthew G. Tucker | 45 | 224 | 7288 |
| Bruce D. Gaulin | 45 | 284 | 6698 |
| Erick J. Dufourc | 43 | 144 | 5882 |
| Norbert Kučerka | 43 | 119 | 7319 |
| Stephen J. Skinner | 42 | 194 | 8522 |