Gießen 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 6: Structure and Dynamics of Nuclei II
HK 6.5: Vortrag
Montag, 11. März 2024, 18:00–18:15, HBR 19: C 5b
Investigation of the proton radius of the neutron-rich Borromean halo nucleus 19B — •Divyang Prajapati for the RIBF132 collaboration — Saint Mary’s University, Halifax, Canada
The structural properties of neutron-rich nuclei are an ideal presentation for understanding the underlying nuclear forces. The evolution of the nuclear charge or matter-density distribution along the isotopic chain reflects the complex nature of strong force. For instance, the drip line nucleus 19B has garnered the attention of theory and experiments due to its Borromean structure. However, the proton distribution of this nucleus is still unknown, and theoretical predictions vary widely.
The measurement of the charge-changing cross-section (σcc) has emerged as a new method for probing the point proton radius of exotic nuclei. Therefore, the σcc of the 19B nucleus was measured at RIBF, RIKEN using the BigRIPS and ZDS. The secondary beam of 19B was produced via projectile fragmentation of a 48Ca primary beam at ∼345A MeV on a 9Be production target. The σcc was measured with a carbon target, placed at the achromatic focus F11. The measurement of Time Of Flight (TOF) using plastic scintillators, magnetic rigidity (Bρ) using PPAC, and energy loss (ΔE) information from MUSIC detectors identifies the A, Q, and Z of the particle.
The presentation will describe the experimental details. Preliminary observations from the data analysis will be discussed. The radius that will be extracted from the measured cross-sections via Glauber model analysis will aid in understanding the evolution of neutron skin in 19B and its Borromean structure.
Keywords: Nuclear radius; Charge-changing cross-section; Fragment seperator