Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes
Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes
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DOI：
10.1103/physrevc.93.054601
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发表时间：
2016-03
影响因子：
3.1
通讯作者：
R. Thies;A. Heinz;T. Adachi;Y. Aksyutina;J. Alcantara-N'unes;S. Altstadt;H. Alvarez-Pol;N. Ashwood;T. Aumann;V. Avdeichikov;M. Barr;S. Beceiro-Novo;D. Bemmerer;J. Benlliure;C. Bertulani;K. Boretzky;M. Borge;G. Burgunder;M. Caamano;C. Caesar;E. Casarejos;W. Catford;J. Cederkall;S. Chakraborty;M. Chartier;L. Chulkov;D. Cortina-Gil;R. Crespo;U. Datta;P. Fern'andez;I. Dillmann;Z. Elekes;J. Enders;O. Ershova;A. Estrad'e;F. Farinon;L. Fraile;M. Freer;M. Freudenberger;H. Fynbo;D. Galaviz;H. Geissel;R. Gernhauser;K. Gobel;P. Golubev;D. G. Diaz;J. Hagdahl;T. Heftrich;M. Heil;M. Heine;A. Henriques;M. Holl;G. Ickert;A. Ignatov;B. Jakobsson;H. Johansson;B. Jonson;N. Kalantar-Nayestanaki;R. Kanungo;R. Knobel;T. Kroll;R. Krucken;J. Kurcewicz;N. Kurz;M. Labiche;C. Langer;T. Bleis;R. Lemmon;O. Lepyoshkina;S. Lindberg;J. Machado;J. Marganiec;Vassili Maroussov;M. Mostazo;A. Movsesyan;A. Najafi;T. Nilsson;C. Nociforo;V. Panin;S. Paschalis;A. Perea;M. Petri;S. Pietri;R. Plag;A. Prochazka;A. Rahaman;G. Rastrepina;R. Reifarth;G. Ribeiro;M. Ricciardi;C. Rigollet;K. Riisager;M. Roder;D. Rossi;J. S. D. Río;D. Savran;H. Scheit;H. Simon;O. Sorlin;V. Stoica;B. Streicher;J. Taylor;O. Tengblad;S. Terashima;Y. Togano;E. Uberseder;J. Walle;P. Velho;V. Volkov;A. Wagner;F. Wamers;H. Weick;M. Weigand;C. Wheldon;G. Wilson;C. Wimmer;J. Winfield;P. Woods;D. Yakorev;M. Zhukov;A. Zilges;K. Zuber
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文献类型：
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作者：
R. Thies;A. Heinz;T. Adachi;Y. Aksyutina;J. Alcantara-N'unes;S. Altstadt;H. Alvarez-Pol;N. Ashwood;T. Aumann;V. Avdeichikov;M. Barr;S. Beceiro-Novo;D. Bemmerer;J. Benlliure;C. Bertulani;K. Boretzky;M. Borge;G. Burgunder;M. Caamano;C. Caesar;E. Casarejos;W. Catford;J. Cederkall;S. Chakraborty;M. Chartier;L. Chulkov;D. Cortina-Gil;R. Crespo;U. Datta;P. Fern'andez;I. Dillmann;Z. Elekes;J. Enders;O. Ershova;A. Estrad'e;F. Farinon;L. Fraile;M. Freer;M. Freudenberger;H. Fynbo;D. Galaviz;H. Geissel;R. Gernhauser;K. Gobel;P. Golubev;D. G. Diaz;J. Hagdahl;T. Heftrich;M. Heil;M. Heine;A. Henriques;M. Holl;G. Ickert;A. Ignatov;B. Jakobsson;H. Johansson;B. Jonson;N. Kalantar-Nayestanaki;R. Kanungo;R. Knobel;T. Kroll;R. Krucken;J. Kurcewicz;N. Kurz;M. Labiche;C. Langer;T. Bleis;R. Lemmon;O. Lepyoshkina;S. Lindberg;J. Machado;J. Marganiec;Vassili Maroussov;M. Mostazo;A. Movsesyan;A. Najafi;T. Nilsson;C. Nociforo;V. Panin;S. Paschalis;A. Perea;M. Petri;S. Pietri;R. Plag;A. Prochazka;A. Rahaman;G. Rastrepina;R. Reifarth;G. Ribeiro;M. Ricciardi;C. Rigollet;K. Riisager;M. Roder;D. Rossi;J. S. D. Río;D. Savran;H. Scheit;H. Simon;O. Sorlin;V. Stoica;B. Streicher;J. Taylor;O. Tengblad;S. Terashima;Y. Togano;E. Uberseder;J. Walle;P. Velho;V. Volkov;A. Wagner;F. Wamers;H. Weick;M. Weigand;C. Wheldon;G. Wilson;C. Wimmer;J. Winfield;P. Woods;D. Yakorev;M. Zhukov;A. Zilges;K. Zuber
背景：描述核碎片和碎片裂变的模型为规划核物理实验和未来的放射性离子束设施提供了重要的输入。这些模型通常以稳定梁实验的数据为基准。未来，以奇异核为垫脚石的两步碎裂反应是到达最富中子核的有前途的工具，因此需要模型来描述这些反应。目的：我们希望将目前可用的碎片反应数据扩展到核图上的光奇异区域。此外，我们希望提高对射弹碎片的理解，尤其是不稳定同位素的碎片。方法：我们测量了与碳靶碰撞的 C10、12-18 和 B10-15 同位素的射弹碎片。这些测量全部在一个实验中进行，从而产生了非常一致的数据集。我们将数据与模型计算进行比较。结果：相对论性 C10,12-18 和 B10-15 同位素撞击碳靶时具有不同最终中子数 (1pxn) 的单质子去除截面。将模型计算与数据进行比较，我们发现epax代码不能令人满意地描述数据。另一方面，使用 abrabla07，我们发现每个磨损核子的平均激发能量需要从 27 MeV 降低到 8.1 MeV。随着这种减少，abrabla07 对数据的描述出奇地好。结论：通过一组一致的新数据将可用数据扩展到光不稳定核，可以系统地研究激发能在射弹碎片中诱导的作用。最引人注目的是每个磨损核子的平均激发能的明显质量依赖性。然而，这个与最终状态相互作用相关的参数需要进一步研究。
Background: Models describing nuclear fragmentation and fragmentation fission deliver important input for planning nuclear physics experiments and future radioactive ion beam facilities. These models are usually benchmarked against data from stable beam experiments. In the future, two-step fragmentation reactions with exotic nuclei as stepping stones are a promising tool for reaching the most neutron-rich nuclei, creating a need for models to describe also these reactions. Purpose: We want to extend the presently available data on fragmentation reactions towards the light exotic region on the nuclear chart. Furthermore, we want to improve the understanding of projectile fragmentation especially for unstable isotopes. Method: We have measured projectile fragments from C10,12-18 and B10-15 isotopes colliding with a carbon target. These measurements were all performed within one experiment, which gives rise to a very consistent data set. We compare our data to model calculations. Results: One-proton removal cross sections with different final neutron numbers (1pxn) for relativistic C10,12-18 and B10-15 isotopes impinging on a carbon target. Comparing model calculations to the data, we find that the epax code is not able to describe the data satisfactorily. Using abrabla07 on the other hand, we find that the average excitation energy per abraded nucleon needs to be decreased from 27 MeV to 8.1 MeV. With that decrease abrabla07 describes the data surprisingly well. Conclusions: Extending the available data towards light unstable nuclei with a consistent set of new data has allowed a systematic investigation of the role of the excitation energy induced in projectile fragmentation. Most striking is the apparent mass dependence of the average excitation energy per abraded nucleon. Nevertheless, this parameter, which has been related to final-state interactions, requires further study.