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Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes

Thies, R.; Heinz, A.; Adachi, T.; Aksyutina, Y.; Alcantara-Núñes, J.; Altstadt, S.; Alvarez-Pol, H.; Ashwood, N.; Aumann, T. and Avdeichikov, V. LU , et al. (2016) In Physical Review C - Nuclear Physics 93(5).
Abstract

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... (More)

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.

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Physical Review C - Nuclear Physics
volume
93
issue
5
publisher
American Physical Society
external identifiers
  • scopus:84964909348
  • wos:000375649000008
ISSN
0556-2813
DOI
10.1103/PhysRevC.93.054601
language
English
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yes
id
2cf89e1d-b398-4f4e-b069-90e6e9514f26
date added to LUP
2016-12-20 13:51:22
date last changed
2017-10-08 04:56:23
@article{2cf89e1d-b398-4f4e-b069-90e6e9514f26,
  abstract     = {<p>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.</p>},
  articleno    = {054601},
  author       = {Thies, R. and Heinz, A. and Adachi, T. and Aksyutina, Y. and Alcantara-Núñes, J. and Altstadt, S. and Alvarez-Pol, H. and Ashwood, N. and Aumann, T. and Avdeichikov, V. and Barr, M. and Beceiro-Novo, S. and Bemmerer, D. and Benlliure, J. and Bertulani, C. A. and Boretzky, K. and Borge, M. J G and Burgunder, G. and Camaño, M. and Caesar, C. and Casarejos, E. and Catford, W. and Cederkäll, J. and Chakraborty, S. and Chartier, M. and Chulkov, L. V. and Cortina-Gil, D. and Crespo, R. and Datta, U. and Díaz Fernández, P. and Dillmann, I. and Elekes, Z. and Enders, J. and Ershova, O. and Estradé, A. and Farinon, F. and Fraile, L. M. and Freer, M. and Freudenberger, M. and Fynbo, H. O U and Galaviz, D. and Geissel, H. and Gernhäuser, R. and Göbel, K. and Golubev, P. and Gonzalez Diaz, D. and Hagdahl, J. and Heftrich, T. and Heil, M. and Heine, M. and Henriques, A. and Holl, M. and Ickert, G. and Ignatov, A. and Jakobsson, B. and Johansson, H. T. and Jonson, B. and Kalantar-Nayestanaki, N. and Kanungo, R. and Knöbel, R. and Kröll, T. and Krücken, R. and Kurcewicz, J. and Kurz, N. and Labiche, M. and Langer, C. and Le Bleis, T. and Lemmon, R. and Lepyoshkina, O. and Lindberg, S. and MacHado, J. and Marganiec, J. and Maroussov, V. and Mostazo, M. and Movsesyan, A. and Najafi, A. and Nilsson, T. and Nociforo, C. and Panin, V. and Paschalis, S. and Perea, A. and Petri, M. and Pietri, S. and Plag, R. and Prochazka, A. and Rahaman, A. and Rastrepina, G. and Reifarth, R. and Ribeiro, G. and Ricciardi, M. V. and Rigollet, C. and Riisager, K. and Röder, M. and Rossi, D. and Sanchez Del Rio, J. and Savran, D. and Scheit, H. and Simon, H. and Sorlin, O. and Stoica, V. and Streicher, B. and Taylor, J. T. and Tengblad, O. and Terashima, S. and Togano, Y. and Uberseder, E. and Van De Walle, J. and Velho, P. and Volkov, V. and Wagner, A. and Wamers, F. and Weick, H. and Weigand, M. and Wheldon, C. and Wilson, G. and Wimmer, C. and Winfield, J. S. and Woods, P. and Yakorev, D. and Zhukov, M. V. and Zilges, A. and Zuber, K.},
  issn         = {0556-2813},
  language     = {eng},
  month        = {05},
  number       = {5},
  publisher    = {American Physical Society},
  series       = {Physical Review C - Nuclear Physics},
  title        = {Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes},
  url          = {http://dx.doi.org/10.1103/PhysRevC.93.054601},
  volume       = {93},
  year         = {2016},
}