Abstract
We directly measure the absolute cross section of in the energy region of –257 keV by using a thin target for the first time. This work is performed on a 320-kV platform at the Institute of Modern Physics in Lanzhou. The astrophysical factors of this reaction are obtained for capture to the ground and first excited states of . The properties of the known resonance at keV are derived and agree with the previous results. However, in the energy region of 170–240 keV, our factors are about 15%–50% larger than the adopted values in NACRE II and are also larger than the upper limits of NACRE II by up to . This indicates that our new reaction rate is enhanced by about 15%–50% compared to the NACRE II adopted rate in the temperature region 0.32–0.62 GK.
- Received 5 February 2016
- Revised 16 March 2016
DOI:https://doi.org/10.1103/PhysRevC.93.055804
©2016 American Physical Society