Coulomb dissociation of $^{20,21}$N
nucl-ex
/ Authors
Marko Röder, Tatsuya Adachi, Yulia Aksyutina, Juan Alcantara, Sebastian Altstadt, Hector Alvarez-Pol, Nicholas Ashwood, Leyla Atar, Thomas Aumann, Vladimir Avdeichikov
and 113 more authors
M. Barr, Saul Beceiro, Daniel Bemmerer, Jose Benlliure, Carlos Bertulani, Konstanze Boretzky, Maria J. G. Borge, G. Burgunder, Manuel Caamano, Christoph Caesar, Enrique Casarejos, Wilton Catford, Joakim Cederkall, S. Chakraborty, Marielle Chartier, Leonid Chulkov, Dolores Cortina-Gil, Raquel Crespo, Ushasi Datta Pramanik, Paloma Diaz-Fernandez, Iris Dillmann, Zoltan Elekes,
/ Abstract
Neutron-rich light nuclei and their reactions play an important role for the creation of chemical elements. Here, data from a Coulomb dissociation experiment on $^{20,21}$N are reported. Relativistic $^{20,21}$N ions impinged on a lead target and the Coulomb dissociation cross section was determined in a kinematically complete experiment. Using the detailed balance theorem, the $^{19}\mathrm{N}(\mathrm{n},γ)^{20}\mathrm{N}$ and $^{20}\mathrm{N}(\mathrm{n},γ)^{21}\mathrm{N}$ excitation functions and thermonuclear reaction rates have been determined. The $^{19}\mathrm{N}(\mathrm{n},γ)^{20}\mathrm{N}$ rate is up to a factor of 5 higher at $T<1$\,GK with respect to previous theoretical calculations, leading to a 10\,\% decrease in the predicted fluorine abundance.