In the nuclear equation of state, the energy associated with an imbalance of neutrons and protons is termed the asymmetry energy, and the density dependence of this quantity is currently the largest uncertainty. The Yennello Research Group focuses on further constraining this density dependence using heavy-ion collisions. Utilizing the K500 and K150 cyclotrons, heavy-ion projectiles are accelerated to up to 40% the speed of light and collided with stationary targets. These reactions are important for studying structure, chemical composition, and the evolution of neutron stars and dynamics of supernovae explosions.

Experiment About Picture
4He,10B, 20Ne, 40Ar to 64Zn, all at the same energy per nucleon, 47 Mev/u; 112Sn and 124Sn Experiments in nuclear collisions with density bla2
86Kr, 78Kr+64Ni,58Ni at 35 MeV/A Experiment in fragment particle identification method bla2.png
4Zn, and 64Ni at 35 MeV/u; 70Zn, 64Zn, and 64Ni Use of the NIMROD-ISiS array to produce  four calibration beams in addition to three reaction systems bla2
70Zn, 64Zn and 64Ni at 35 MeV/nucleon; 70Zn, 64Zn and 64Ni Using the NIMROD-ISiS array, two sets of calibration were found bla2
40Ar+58Fe,70Zn and 40Ca+58Ni at 40A MeV Investigating the position dependence using the  Forward Array Using Silicon Technology (FAUST) detectors bla2
136Xe, 124Xe and 124Sn at 15 MeV/nucleon Studying ternary Breaking of the Reaction System in Heavy-Ion Collisions using the FAUST array.
124Xe and 136Xe to 49.2 s. MeV/u; 112Sn and 124Sn Discovering the Xe + Sn cross-bombardment reaction. bla2
32S ions of energy 45 MeV/nucleon, 112Sn target. Detecting Fragments produced in peripheral and semi-peripheral collisions by the FAUST multi-detector array. bla2
28Si + 112Sn and 124Sn at 30A and 50A MeV Investigation of isotopic identification bla2
40Ca + 27Al at 52A MeV l\Lines for three known isotopes (typically 1H, 4He, 7Be) are assigned and energy calibration were calculated using FAUST bla2
24Mg, 40Ca, 40Ar, 48Ca at 32A MeV + 112Sn and 124Sn and 40Ca, 40Ar, 48Ca at 45A MeV + 112Sn and 124Sn Using the Superconducting Solenoid Rare Isotope Beam Line [8] rare ion beams will be produced and identified with TOF techniques. bla2