Abstract
We have completed measurements of the 142,144Nd(n,γ) cross sections from approximately 20 eV to 200 keV at the Oak Ridge Electron Linear Accelerator (ORELA) using a recently improved C6D6 detector apparatus. 142Nd is an s-only isotope, i.e. it is only formed during the s-process. It has a closed neutron shell and therefore defines a step in the < σ >Ns curve from which the mean s-process neutron exposure can be calculated. In addition, 144Nd is the normalization point for the neodymium abundances. Also accurate (n,γ) cross sections would help to determine the r-and p-process residuals of these isotopes and will impact the interpretation of the recently discovered isotopic anomalies in silicon carbide grains from the Murchison meteorite. Our new (n,γ) cross sections also show that reaction rate extrapolations for nuclei near closed neutron shells from measured values at 30 keV down to 8 keV can be inaccurate.
| Original language | English |
|---|---|
| Pages (from-to) | 266-269 |
| Number of pages | 4 |
| Journal | Nuclear Physics A |
| Volume | 621 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Aug 4 1997 |
Funding
*The JIHIR has as member institutions the University of Tennessee, Vanderbilt University, and the Oak Ridge National Laboratory; it is supported by the members and by the Department of Energy through Contract Number DE-FG05-87ER40361 with the University of Tennessee. tResearch sponsored by the Oak Ridge National Laboratory, managed by Lockheed Martin Energy Research Corporation for the U.S. Dept. of Energy under contract number DE-AC05-960R22464
| Funders | Funder number |
|---|---|
| Lockheed Martin Energy Research Corporation | |
| U.S. Department of Energy | DE-AC05-960R22464, DE-FG05-87ER40361 |
| Oak Ridge National Laboratory | |
| Vanderbilt University | |
| University of Tennessee |