William J Jenkins
Biographic Data
| ID | 5598695 |
|---|---|
| NAME | William J Jenkins |
| GIVEN NAMES | William J |
| FAMILY NAME | Jenkins |
| SIGNATURE | JENKINS W J |
| VERIFIED | No |
| TOTAL WORKS | 5 |
| TOTAL CITATIONS | 6 |
| AUTHOR COUNT | 5 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2010 |
| LATEST PUBLICATION YEAR | 2020 |
| H-INDEX | 1 |
Psychology
Psychology by OpenStax
Improved Precision of Radiocarbon Measurements for CH 4 and CO 2 Using GC and Continuous-Flow AMS Achieved by Summation of Repeated Injections
Compound specific radiocarbon measurements can be made instantaneously using a gas chromatograph (GC) combustion system coupled to a 14 C AMS system fitted with a gas ion source. Samples below 10 μg C can be analyzed but the precision is reduced to 5–10% because of lower source efficiency. We modified our GC for CH 4 and CO 2 analysis and injected samples multiple times to sum data and increase precision. We attained a maximum precision of 0.6% f…
The Passage of the Bomb Radiocarbon Pulse into the Pacific Ocean
We report and compare radiocarbon observations made on 2 meridional oceanographic sections along 150°W in the South Pacific in 1991 and 2005. The distributions reflect the progressive penetration of nuclear weapons-produced 14 C into the oceanic thermocline. The changes over the 14 yr between occupations are demonstrably large relative to any possible drift in our analytical standardization. The computed difference field based on the gridded data…
A Continuous-Flow Gas Chromatography 14 C Accelerator Mass Spectrometry System
Gas-accepting ion sources for radiocarbon accelerator mass spectrometry (AMS) have permitted the direct analysis of CO 2 gas, eliminating the need to graphitize samples. As a result, a variety of analytical instruments can be interfaced to an AMS system, processing time is decreased, and smaller samples can be analyzed (albeit with lower precision). We have coupled a gas chromatograph to a compact 14 C AMS system fitted with a microwave ion sourc…
The Passage of the Bomb Radiocarbon Pulse into the Pacific Ocean
We report and compare radiocarbon observations made on 2 meridional oceanographic sections along 150°W in the South Pacific in 1991 and 2005. The distributions reflect the progressive penetration of nuclear weapons-produced 14 C into the oceanic thermocline. The changes over the 14 yr between occupations are demonstrably large relative to any possible drift in our analytical standardization. The computed difference field based on the gridded data…
Improved Precision of Radiocarbon Measurements for CH 4 and CO 2 Using GC and Continuous-Flow AMS Achieved by Summation of Repeated Injections
Compound specific radiocarbon measurements can be made instantaneously using a gas chromatograph (GC) combustion system coupled to a 14 C AMS system fitted with a gas ion source. Samples below 10 μg C can be analyzed but the precision is reduced to 5–10% because of lower source efficiency. We modified our GC for CH 4 and CO 2 analysis and injected samples multiple times to sum data and increase precision. We attained a maximum precision of 0.6% f…
A Continuous-Flow Gas Chromatography 14 C Accelerator Mass Spectrometry System
Gas-accepting ion sources for radiocarbon accelerator mass spectrometry (AMS) have permitted the direct analysis of CO 2 gas, eliminating the need to graphitize samples. As a result, a variety of analytical instruments can be interfaced to an AMS system, processing time is decreased, and smaller samples can be analyzed (albeit with lower precision). We have coupled a gas chromatograph to a compact 14 C AMS system fitted with a microwave ion sourc…
The Passage of the Bomb Radiocarbon Pulse into the Pacific Ocean
We report and compare radiocarbon observations made on 2 meridional oceanographic sections along 150°W in the South Pacific in 1991 and 2005. The distributions reflect the progressive penetration of nuclear weapons-produced 14 C into the oceanic thermocline. The changes over the 14 yr between occupations are demonstrably large relative to any possible drift in our analytical standardization. The computed difference field based on the gridded data…
A Continuous-Flow Gas Chromatography 14 C Accelerator Mass Spectrometry System
Gas-accepting ion sources for radiocarbon accelerator mass spectrometry (AMS) have permitted the direct analysis of CO 2 gas, eliminating the need to graphitize samples. As a result, a variety of analytical instruments can be interfaced to an AMS system, processing time is decreased, and smaller samples can be analyzed (albeit with lower precision). We have coupled a gas chromatograph to a compact 14 C AMS system fitted with a microwave ion sourc…
Improved Precision of Radiocarbon Measurements for CH 4 and CO 2 Using GC and Continuous-Flow AMS Achieved by Summation of Repeated Injections
Compound specific radiocarbon measurements can be made instantaneously using a gas chromatograph (GC) combustion system coupled to a 14 C AMS system fitted with a gas ion source. Samples below 10 μg C can be analyzed but the precision is reduced to 5–10% because of lower source efficiency. We modified our GC for CH 4 and CO 2 analysis and injected samples multiple times to sum data and increase precision. We attained a maximum precision of 0.6% f…
Psychology by OpenStax
Psychology
Accelerator mass spectrometry (3 works) · Chemistry (2 works) · Chromatography (2 works) · Education (2 works) · Gas chromatography (2 works) · Geology (2 works) · Open educational resources (2 works) · Open Textbooks (2 works) · Paleontology (2 works) · Radiocarbon dating (2 works)