Abstract
We study the Coulomb dissociation of the 19C nucleus in an effective field theory that uses the 18C core and the neutron as effective degrees of freedom and exploits the separation of scales in this halo system. We extract the effective-range parameters and the separation energy of the halo neutron from the experimental data reported in Refs. [31,35], taken at RIKEN by Nakamura et al. (1999, 2003). We obtain a value of (575 ± 55(stat ) ± 20(EFT))keV for the one-neutron separation energy of 19C, and (7.75 ± 0.35(stat ) ± 0.3(EFT))fm for the 18C-neutron scattering length. The width of the longitudinal momentum distribution predicted by EFT using this separation energy agrees well with the experimental data taken at NSCL by Bazin et al. (1998) [9], reaffirming the dominance of the s-wave configuration of the valence neutron.
| Original language | English |
|---|---|
| Pages (from-to) | 103-115 |
| Number of pages | 13 |
| Journal | Nuclear Physics A |
| Volume | 913 |
| DOIs | |
| State | Published - Sep 2 2013 |
| Externally published | Yes |
Funding
This work was supported by the US Department of Energy under grant DE-FG02-93ER40756 . We thank T. Nakamura for sending us the data from Refs. [31] and [35] , for explaining details of the experiment to us, and for comments on the manuscript. We are grateful to G. Baur for useful correspondence regarding Refs. [36] and [37] , to D. Bazin and R. Kanungo for discussions regarding data, to R. Kharab for providing details of the calculations reported in Ref. [38] , and to H.-W. Hammer for suggesting 19 C as a good candidate for the application of halo EFT.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | DE-FG02-93ER40756 |
| Science and Technology Facilities Council | ST/J002798/1 |
Keywords
- C
- Coulomb dissociation
- Effective field theory
- Halo nuclei