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

1 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
2 GANIL - Grand Accélérateur National d'Ions Lourds

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.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. Röder, T. Adachi, Y. Aksyutina, J. Alcantara, S. Altstadt, et al.. Coulomb dissociation of $^{20,21}$N. Physical Review C, 2016, 93, pp.065807. ⟨10.1103/PhysRevC.93.065807⟩. ⟨in2p3-01325998⟩