BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Recent data on fusion far below the barrier for 12C + 28Si
DTSTART;VALUE=DATE-TIME:20240528T084000Z
DTEND;VALUE=DATE-TIME:20240528T090000Z
DTSTAMP;VALUE=DATE-TIME:20260812T031525Z
UID:indico-contribution-23078@indico.ific.uv.es
DESCRIPTION:Speakers: Giovanna Montagnoli (Dip. di Fisica e Astronomia\, U
 niv. di Padova\, and INFN-PD)\nHeavy-ion fusion reactions are essential to
  investigate the fundamental problem of quantum tunnelling of many-body sy
 stems in the presence of intrinsic degrees of freedom. Studying the fusion
  of light systems with Q > 0\, and the identification of hindrance [a] req
 uires challenging measurements. The investigation of slightly heavier case
 s allows a reliable extrapolation towards the lighter astrophysical system
 s.\nWe measured the fusion excitation function of $^{12}$C + $^{28}$Si dow
 n to hundreds of nanobarn\, using $^{28}$Si beams from the XTU Tandem acce
 lerator of LNL. The combined setup of the γ-spectrometer AGATA [b] and tw
 o DSSD [c] around the target\, was used.  The fusion-evaporation charged p
 articles were detected by the DSSD. The prompt γ-rays emitted by the evap
 oration residues (ER) were detected by AGATA. The fusion cross-sections ar
 e obtained from the coincident events between γ-rays and charged particle
 s.\nThe light-charged particles have been identified through pulse shape d
 iscrimination\, using their energy E$_{part}$ vs the rise time of the sign
 al $psd$ (left figure). The matrix on the right combines the coincidence e
 vents between the energies of γ-rays and charged particles\, detected by 
 one ring of the forward DSSD\, at E$_{lab}$=50 MeV. The main transitions f
 rom the ER are identified. Neutron evaporation could not be observed\, but
  it is calculated to be not more than a few per cent for this system in th
 e measured energy range.\nPreliminary analyses provide very promising resu
 lts in the study of fusion cross sections for $^{12}$C + $^{28}$Si and oth
 er light systems at deep sub-barrier energies. The final results of this e
 xperiment will be shown.\n\n[Figure][1]\n[a] C.L. Jiang et al.\, Phys. Rev
 . Lett. 89\, 052701 (2002)\n[b] J.J. Valiente-Dobon et al.\, Nucl. Inst. M
 eth. Phys. Res.  A 1049\, 168040 (2023)\n[c] http://www.micronsemiconducto
 r.co.uk\n\n\n  [1]: https://drive.google.com/file/d/1PTjdz_HcLoQ8Pm0EMyxMU
 QC6SGneYhpD/view?usp=sharing\n\nhttps://indico.ific.uv.es/event/7332/contr
 ibutions/23078/
LOCATION:ADEIT - Valencia
URL:https://indico.ific.uv.es/event/7332/contributions/23078/
END:VEVENT
END:VCALENDAR