Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon
Апстракт
We report the study of the reaction 15 MeV/nucleon U-238 + (197)AU, in, which up to 7 final heavy fragments have been detected, using a CR-39 plastic nuclear track detector. The measured multiplicity distributions indicate that the binary fission of one (U-like) or both (U-like and Au-like) primary products clearly dominates for peripheral and intermediate impact parameters exhausting more than 80% of the total cross section. Multifragment emission sets in for the most central collisions. Reactions with 3 heavy final fragments, accounting for half of the total cross section, have been analysed event-by-event after measuring the geometrical parameters of each detected track, assuming momentum conservation and using empirical range-energy-charge curves. Most of these ternary processes originate in a two-step mechanism: a initial peripheral projectile-target interaction plus a deep-inelastic process followed by the subsequent fission-like decay of one of the fragments (mainly the quasipro...jectile). Indeed, the relative velocity between the two fastest fragments are clearly peaked at values close to the Viola systematics for the fission of a very-heavy nucleus.
Кључне речи:
15 MeV/nucleon U-238+Au-197 / nuclear tracks / CR-39 / quasiprojectile / quasitarget / cross sections / multifragment emission / ternary events / reaction mechanism / sequential binary fissionИзвор:
Radiation Measurements, 1999, 31, 1-6, 527-532Напомена:
- 19th International Conference on Nuclear Tracks in Solids (ICNTSs), Aug 31-Sep 05, 1998, Besancon, France
DOI: 10.1016/S1350-4487(99)00134-1
ISSN: 1350-4487
WoS: 000081997700100
Scopus: 2-s2.0-0032590669
Колекције
Институција/група
VinčaTY - JOUR AU - D'Enterria, DG AU - Fernandez, F AU - Jokić, Stevan AU - Savović, Svetislav AU - Debeauvais, M AU - Zamani, M PY - 1999 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6282 AB - We report the study of the reaction 15 MeV/nucleon U-238 + (197)AU, in, which up to 7 final heavy fragments have been detected, using a CR-39 plastic nuclear track detector. The measured multiplicity distributions indicate that the binary fission of one (U-like) or both (U-like and Au-like) primary products clearly dominates for peripheral and intermediate impact parameters exhausting more than 80% of the total cross section. Multifragment emission sets in for the most central collisions. Reactions with 3 heavy final fragments, accounting for half of the total cross section, have been analysed event-by-event after measuring the geometrical parameters of each detected track, assuming momentum conservation and using empirical range-energy-charge curves. Most of these ternary processes originate in a two-step mechanism: a initial peripheral projectile-target interaction plus a deep-inelastic process followed by the subsequent fission-like decay of one of the fragments (mainly the quasiprojectile). Indeed, the relative velocity between the two fastest fragments are clearly peaked at values close to the Viola systematics for the fission of a very-heavy nucleus. T2 - Radiation Measurements T1 - Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon VL - 31 IS - 1-6 SP - 527 EP - 532 DO - 10.1016/S1350-4487(99)00134-1 ER -
@article{ author = "D'Enterria, DG and Fernandez, F and Jokić, Stevan and Savović, Svetislav and Debeauvais, M and Zamani, M", year = "1999", abstract = "We report the study of the reaction 15 MeV/nucleon U-238 + (197)AU, in, which up to 7 final heavy fragments have been detected, using a CR-39 plastic nuclear track detector. The measured multiplicity distributions indicate that the binary fission of one (U-like) or both (U-like and Au-like) primary products clearly dominates for peripheral and intermediate impact parameters exhausting more than 80% of the total cross section. Multifragment emission sets in for the most central collisions. Reactions with 3 heavy final fragments, accounting for half of the total cross section, have been analysed event-by-event after measuring the geometrical parameters of each detected track, assuming momentum conservation and using empirical range-energy-charge curves. Most of these ternary processes originate in a two-step mechanism: a initial peripheral projectile-target interaction plus a deep-inelastic process followed by the subsequent fission-like decay of one of the fragments (mainly the quasiprojectile). Indeed, the relative velocity between the two fastest fragments are clearly peaked at values close to the Viola systematics for the fission of a very-heavy nucleus.", journal = "Radiation Measurements", title = "Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon", volume = "31", number = "1-6", pages = "527-532", doi = "10.1016/S1350-4487(99)00134-1" }
D'Enterria, D., Fernandez, F., Jokić, S., Savović, S., Debeauvais, M.,& Zamani, M.. (1999). Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon. in Radiation Measurements, 31(1-6), 527-532. https://doi.org/10.1016/S1350-4487(99)00134-1
D'Enterria D, Fernandez F, Jokić S, Savović S, Debeauvais M, Zamani M. Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon. in Radiation Measurements. 1999;31(1-6):527-532. doi:10.1016/S1350-4487(99)00134-1 .
D'Enterria, DG, Fernandez, F, Jokić, Stevan, Savović, Svetislav, Debeauvais, M, Zamani, M, "Ternary events measured with CR-39 in the U-238+Au-197 reaction at 15 MeV/nucleon" in Radiation Measurements, 31, no. 1-6 (1999):527-532, https://doi.org/10.1016/S1350-4487(99)00134-1 . .