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Fragmentation of56Fe in Al at 1.88A GeV

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Il Nuovo Cimento C

Summary

The production of fragmented nuclei from relativistic56Fe beam available from LBL Bevalac at 1.88A GeV has been studied using CR-39 (DOP) passive detector placed at an angle of 60° with respect to the beam. The histogram showing the experimental frequency distribution of minor axes of the elliptic etch pit shows the presence of the fragmented nuclei produced with charge numberZ from 25 up to 21. The histogram further reveals the presence of nuclei withZ=27 and 28. The production of nuclei heavier than56Fe is possibly due to the charge exchange or pick-up phenomena.

Riassunto

Si è studiata la produzione di nuclei frantumati da un fascio di56Fe disponibili dal Bevalac LBL a 1.88A GeV usando un rilevatore passivo (DOP) CR-39 a un angolo di 60° rispetto al fascio. L'istogramma che mostra la distribuzione di frequenza sperimentale degli assi minori dell'etch pit ellittico rivela la presenza di nuclei frantumati prodotti con numero di caricaZ da 25 a 21. L'istogramma rivela inoltre la presenza di nuclei conZ=27 e 28. La produzione di nuclei più pesanti del56Fe è probabilmente causata dai fenomeni di scambio della carica o fenomeni di pick-up.

Резюме

Исследуется рождение фрагментированных ядер от релятивистского пучка56Fe, имеющегося в LBLBevalac, с энергией 1.77A ГэВ. Для исследования используегся пассивный детектор CR-39 (DOP), расположенный под углом 60° по отношению к пучку. Гистограмма экспериментального частотного распределения обнаруживает наличие фрагментированных ядер, рожденных с зарядовым числомZ от 25 до 21. Гистограмма также обнаруживает наличие ядер сZ=27 и 28. Рождение ядер с зарядами, превышающими заряд железа, оказывается возможным, благодаря процессам перезарядки.

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Authors and Affiliations

  1. Department of Theoretical Physics, Indian Association for the Cultivation of Science, 700 032, Calcutta, India

    D. P. Bhattacharyya, P. Pal, B. Basu, R. Rakshit & S. C. Mukherjee

  2. Department of Physics, University College of Science, 700 009, Calcutta, India

    A. K. Ganguly & B. Chowdhuri

  3. Cosmic Ray and Space Physics Division, Tata Institute of Fundamental Research, 400 005, Bombay, India

    S. Biswas & N. Durgaprasad

Authors
  1. D. P. Bhattacharyya
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  2. P. Pal
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  3. B. Basu
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  4. R. Rakshit
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  5. S. C. Mukherjee
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  6. A. K. Ganguly
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  7. B. Chowdhuri
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  8. S. Biswas
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  9. N. Durgaprasad
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Bhattacharyya, D.P., Pal, P., Basu, B. et al. Fragmentation of56Fe in Al at 1.88A GeV. Il Nuovo Cimento C 11, 365–371 (1988). https://doi.org/10.1007/BF02533130

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  • DOI: https://doi.org/10.1007/BF02533130

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