Coulomb dissociation of $^{20,21}$N

M. Röder T. Adachi Y. Aksyutina J. Alcantara S. Altstadt H. Alvarez-Pol N. Ashwood L. Atar T. Aumann 1 V. Avdeichikov M. Barr S. Beceiro D. Bemmerer J. Benlliure C. Bertulani K. Boretzky M.J.G. Borge G. Burgunder 2 M. Caamano C. Caesar E. Casarejos W. Catford J. Cederkall S. Chakraborty M. Chartier L. Chulkov D. Cortina-Gil R. Crespo U.D. Pramanik P. Diaz-Fernandez I. Dillmann Z. Elekes J. Enders O. Ershova A. Estrade F. Farinon L.M. Fraile M. Freer M. Freudenberger H. Fynbo D. Galaviz H. Geissel R. Gernhäuser K. Göbel P. Golubev D.G. Diaz J. Hagdahl T. Heftrich M. Heil M. Heine A. Heinz A. Henriques M. Holl G. Ickert A. Ignatov B. Jakobsson H. Johansson B. Jonson N. Kalantar-Nayestanaki R. Kanungo A. Kelic-Heil R. Knöbel T. Kröll R. Krücken J. Kurcewicz N. Kurz M. Labiche C. Langer T. Le Bleis R. Lemmon O. Lepyoshkina S. Lindberg J. Machado J. Marganiec M. Caro A. Movsesyan M.A. Najafi T. Nilsson C. Nociforo V. Panin S. Paschalis A. Perea M. Petri S. Pietri R. Plag A. Prochazka Md.A. Rahaman G. Rastrepina R. Reifarth G. Ribeiro M.V. Ricciardi C. Rigollet K. Riisager D. Rossi J. Sanchez del Rio Saez D. Savran H. Scheit H. Simon O. Sorlin 2 V. Stoica B. Streicher J. Taylor O. Tengblad S. Terashima R. Thies Y. Togano E. Uberseder J. van de Walle P. Velho V. Volkov A. Wagner F. Wamers H. Weick M. Weigand C. Wheldon G. Wilson C. Wimmer J. S. Winfield P. Woods D. Yakorev M. Zhukov A. Zilges K. Zuber
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 $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ and $^{20}\mathrm{N}(\mathrm{n},\gamma)^{21}\mathrm{N}$ excitation functions and thermonuclear reaction rates have been determined. The $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ 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.
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M. Röder, T. Adachi, Y. Aksyutina, J. Alcantara, S. Altstadt, et al.. Coulomb dissociation of $^{20,21}$N. Physical Review C, American Physical Society, 2016, 93, pp.065807. ⟨10.1103/PhysRevC.93.065807⟩. ⟨in2p3-01325998⟩

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