D D Leach
Biographic Data
| ID | 5597801 |
|---|---|
| NAME | D D Leach |
| GIVEN NAMES | D D |
| FAMILY NAME | Leach |
| SIGNATURE | LEACH D D |
| VERIFIED | No |
| TOTAL WORKS | 3 |
| TOTAL CITATIONS | 8 |
| WORKS AS AUTHOR | 3 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1983 |
| LATEST PUBLICATION YEAR | 1989 |
| H-INDEX | 2 |
Importance of Biospheric Co2 in a Subcanopy Atmosphere Deduced From 14C AMS Measurements
14 C concentrations in the stem cellulose of a Sitka spruce from the Pacific coast of Washington respond to changes in atmospheric 14 CO 2 concentration within 5–6 weeks. δ 14 C values for cellulose were consistently lower than those of the corresponding clean troposphere during rapid increase in atmospheric 14 C caused by nuclear weapons tests (1962–64). Possible reasons for this include: 1) a delay of days or weeks in incorporation of recent ph…
Technological Advances in the University of Washington Accelerator Mass Spectrometry System
During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14 C/ 12 C and 10 Be/ 9 Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques …
Current 14 C Measurements with the University of Washington FN Tandem Accelerator
Our accelerator mass spectrometry (AMS) system shows a one-to-one relationship between sample 14 C concentrations determined by AMS - and by β-counting. Measurements of unknown samples against a standard indicate that 14 C concentration measurements to better than 2% can be made. For a 30-second data collection interval in a typical run of 100 intervals, the variability of the beam injected into the accelerator is ca 2%, that of the machine trans…
Importance of Biospheric Co2 in a Subcanopy Atmosphere Deduced From 14C AMS Measurements
14 C concentrations in the stem cellulose of a Sitka spruce from the Pacific coast of Washington respond to changes in atmospheric 14 CO 2 concentration within 5–6 weeks. δ 14 C values for cellulose were consistently lower than those of the corresponding clean troposphere during rapid increase in atmospheric 14 C caused by nuclear weapons tests (1962–64). Possible reasons for this include: 1) a delay of days or weeks in incorporation of recent ph…
Current 14 C Measurements with the University of Washington FN Tandem Accelerator
Our accelerator mass spectrometry (AMS) system shows a one-to-one relationship between sample 14 C concentrations determined by AMS - and by β-counting. Measurements of unknown samples against a standard indicate that 14 C concentration measurements to better than 2% can be made. For a 30-second data collection interval in a typical run of 100 intervals, the variability of the beam injected into the accelerator is ca 2%, that of the machine trans…
Technological Advances in the University of Washington Accelerator Mass Spectrometry System
During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14 C/ 12 C and 10 Be/ 9 Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques …
Technological Advances in the University of Washington Accelerator Mass Spectrometry System
During the past year we have continued to work toward greater stability and flexibility in nearly all elements of our accelerator mass spectrometry (AMS) system, which is based upon an FN tandem Van de Graaff accelerator, and have carried out measurements of 14 C/ 12 C and 10 Be/ 9 Be isotopic abundance ratios in natural samples. The principal recent developments and improvements in the accelerator system and in our sample preparation techniques …
Current 14 C Measurements with the University of Washington FN Tandem Accelerator
Our accelerator mass spectrometry (AMS) system shows a one-to-one relationship between sample 14 C concentrations determined by AMS - and by β-counting. Measurements of unknown samples against a standard indicate that 14 C concentration measurements to better than 2% can be made. For a 30-second data collection interval in a typical run of 100 intervals, the variability of the beam injected into the accelerator is ca 2%, that of the machine trans…
Importance of Biospheric Co2 in a Subcanopy Atmosphere Deduced From 14C AMS Measurements
14 C concentrations in the stem cellulose of a Sitka spruce from the Pacific coast of Washington respond to changes in atmospheric 14 CO 2 concentration within 5–6 weeks. δ 14 C values for cellulose were consistently lower than those of the corresponding clean troposphere during rapid increase in atmospheric 14 C caused by nuclear weapons tests (1962–64). Possible reasons for this include: 1) a delay of days or weeks in incorporation of recent ph…
Chemistry (3 works) · Geology (3 works) · Physics (3 works) · Radiocarbon dating (3 works) · Accelerator mass spectrometry (2 works) · Mass spectrometry (2 works) · Nuclear physics (2 works) · Nuclear Physics and Applications (2 works) · Radioactivity and Radon Measurements (2 works) · Radiochemistry (2 works)