Particle Identification in the NIMROD-ISiS Detector Array

Wuenschel, S.; Hagel, K.; May, L. W.; Wada, Roy; Yennello, S. J.

doi:10.1063/1.3120164

Cited by 8 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, we seek to measure the temperature of reconstructed quasiprojectiles from the reactions of 86,78 Kr+ 64,58 Ni at 35MeV/nucleon collected with the NIMROD-ISiS array [20,21] at Texas A&M University. The NIMROD-ISiS array is a 4π charged particle array housed inside the TAMU Neutron Ball.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Measuring the temperature of hot nuclear fragments

et al. 2010

Self Cite

View full text Add to dashboard Cite

A new thermometer based on fragment momentum fluctuations is presented. This thermometer exhibited residual contamination from the collective motion of the fragments along the beam axis. For this reason, the transverse direction has been explored. Additionally, a mass dependence was observed for this thermometer. This mass dependence may be the result of the Fermi momentum of nucleons or the different properties of the fragments (binding energy, spin etc..) which might be more sensitive to different densities and temperatures of the exploding fragments. We expect some of these aspects to be smaller for protons (and/or neutrons); consequently, the proton transverse momentum fluctuations were used to investigate the temperature dependence of the source.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The ∆E-E method is used for Z ≥ 3 on Si-Si and Si-CsI. The particle identification was done through linearization of the raw data [21] to remove the non-trivial curvature due to energy deposition characteristics of the detection methods (see left panel of Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Measuring the temperature of hot nuclear fragments

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…Detector thresholds limited the isotopic resolution to 1 ≤ Z ≤ 2 particles for the backward angles. A linearization procedure was utilized to complete the particle identification [51,55,56].…”

Section: Experimental and Theoretical Detailsmentioning

confidence: 99%

Transverse collective flow and midrapidity emission of isotopically identified light charged particles

et al. 2011

Self Cite

View full text Add to dashboard Cite

The transverse flow and relative mid-rapidity yield of isotopically identified light charged particles (LCPs) Ni systems. A large enhancement of the mid-rapidity yield of the LCPs was observed relative to the yield near the projectile rapidity. In particular, this enhancement was increased for the more neutron-rich LCPs demonstrating a preference for the production of neutron-rich fragments in the mid-rapidity region. Additionally, the transverse flow of the LCPs was extracted which provides insight into the average movement of the particles in the mid-rapidity region. Isotopic and isobaric effects were observed in the transverse flow of the fragments. In both cases, the transverse flow was shown to decrease with an increasing neutron content in the fragments. A clear inverse relationship between the transverse flow and relative mid-rapidity yield is shown. The increased relative mid-rapidity emission produces a decreased transverse flow. The Stochastic Mean-Field model was used for comparison to the experimental data. The results showed that the model was able to reproduce the general isotopic and isobaric trends for the mid-rapidity emission and transverse flow. The sensitivity of these observables to the density dependence of the symmetry energy was explored. The results indicate that the transverse flow and mid-rapidity emission of the LCPs are sensitive to the denisty dependence of the symmetry energy.

show abstract

“…Beams of 64,70 Zn and 64 Ni at 35 AMeV beam energy were impinged on 64,70 Zn and 64 Ni targets. The 4π NIMROD-ISiS array [10] provided isotopic resolution for Z ≤ 17. Further details on the experiment can be found in [11].…”

Section: The Experiments and The Impact Of The Source Reconstructionmentioning

confidence: 99%

Constraining the symmetry energy from fragment yields

Marini

Bonasera

2012

EPJ Web of Conferences

View full text Add to dashboard Cite

Methods of extraction of the symmetry energy coefficient to temperature ratio from isobaric and isotopic yields of fragments produced in Fermi-energy heavy-ion collisions are discussed. Consistent results are obtained when the hot fragmenting source is well characterized and its excitation energy and isotopic composition are properly taken into account. The results, independent of the mass number of the detected fragments, suggest that their fate is decided very early in the reaction. A comparison to the Statistical Multifragmentation Model (SMM) predictions is also presented.The effort to understand the properties of asymmetric nuclear matter both at normal densities and at densities away from the saturation density has stimulated a growing interest in isospin effects in nuclear reactions. The isotopic distribution of fragments produced in multifragmentation events in central collisions at intermediate energies can probe properties of low density nuclear matter. Different methods to extract the "symmetry energy" coefficient from yield ratios have been proposed. Among those, we focus on three seemingly different approaches: isoscaling [1-4], m-scaling and isobaric yield ratio method [5], and we show that consistent experimental results can be extracted provided that the properties of the hot fragmenting source, such as its isospin composition and excitation energy, are properly taken into account. We remark that experimentally whether the equilibrium process, occurring during the multifragmentation, takes place at constant pressure or volume (freeze-out hypothesis) is not determined. This ambiguity casts some doubts on the derived quantity, i.e. symmetry energy or symmetry enthalpy. Keeping in mind this ambiguity we will refer to the experimentally extracted quantity as the symmetry energy.

show abstract

Particle Identification in the NIMROD-ISiS Detector Array

Cited by 8 publications

References 4 publications

Measuring the temperature of hot nuclear fragments

Measuring the temperature of hot nuclear fragments

Transverse collective flow and midrapidity emission of isotopically identified light charged particles

Constraining the symmetry energy from fragment yields

Contact Info

Product

Resources

About