Texas Active Target (TexAT) detector for experiments with rare isotope beams

Koshchiy, E.; Rogachev, G. V.; Pollacco, E. C.; Ahn, Sang Chul; Uberseder, E.; Hooker, J.; Bishop, J.; Aboud, E.; Barbui, M.; Goldberg, V. Z.; Hunt, Curtis; Jayatissa, H.; Magana, Cordero; O’Dwyer, R.; Roeder, B. T.; Saastamoinen, A.; Upadhyayula, S.

doi:10.1016/j.nima.2020.163398

Cited by 40 publications

(25 citation statements)

References 22 publications

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“…Secondly, the 10 C(α,α) resonant elastic scattering reaction was explored using the ROOT C++ code. Detailed Monte-Carlo simulations of the Texas Active Target (TexAT) detector [3,12] were used to model this reaction in Thick Target Inverse Kinematics (TTIK). In TTIK, a heavy ion passes through a light gas, allowing the cross section over a range of energies to be measured with a single beam energy.…”

Section: Methodsmentioning

confidence: 99%

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A Fast Universal Kinematic Fitting Code for Low-Energy Nuclear Physics: FUNKI_FIT

Smith

Bishop

2019

Physics

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We present an open source kinematic fitting routine designed for low-energy nuclear physics applications. Although kinematic fitting is commonly used in high-energy particle physics, it is rarely used in low-energy nuclear physics, despite its effectiveness. A FORTRAN and ROOT C++ version of the FUNKI_FIT kinematic fitting code have been developed and published open access. The FUNKI_FIT code is universal in the sense that the constraint equations can be easily modified to suit different experimental set-ups and reactions. Two case studies for the use of this code, utilising experimental and Monte-Carlo data, are presented: (1) charged-particle spectroscopy using silicon-strip detectors; (2) charged-particle spectroscopy using active target detectors. The kinematic fitting routine provides an improvement in resolution in both cases, demonstrating, for the first time, the applicability of kinematic fitting across a range of nuclear physics applications. The ROOT macro has been developed in order to easily apply this technique in standard data analysis routines used by the nuclear physics community.

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Section: Methodsmentioning

confidence: 99%

“…In order to benchmark this approach, a Geant4 simulation was used that simulates the detector response of the TexAT (Texas Active Target) TPC [12]. The detailed simulation includes the full detector geometry, segmentation of the readout plane, and diffusion of electrons as they drift through the TPC.…”

Section: Simulated Tpc Datamentioning

confidence: 99%

A Fast Universal Kinematic Fitting Code for Low-Energy Nuclear Physics: FUNKI_FIT

Smith

Bishop

2019

Physics

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“…Silicon charged-particle detectors typically have an absolute energy resolution of 30-50 keV, meaning that differentiating between the three α-particles using such detectors can be difficult. An alternative approach is to measure the decay of the Hoyle state in a Time Projection Chamber (TPC) such as those in references [41][42][43]. In these cases, the relative angles between the three α-particles could be used to differentiate the two decay channels.…”

Section: Carbon-12mentioning

confidence: 99%

The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

et al. 2020

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Our present understanding of the structure of the Hoyle state in 12 C and other near-threshold states in α-conjugate nuclei is reviewed in the framework of the α-condensate model. The 12 C Hoyle state, in particular, is a candidate for α-condensation, due to its large radius and α-cluster structure. The predicted features of nuclear α-particle condensates are reviewed along with a discussion of their experimental indicators, with a focus on precision break-up measurements. Two experiments are discussed in detail, firstly concerning the break-up of 12 C and then the decays of heavier nuclei. With more theoretical input, and increasingly complex detector setups, precision break-up measurements can, in principle, provide insight into the structures of states in α-conjugate nuclei. However, the commonly-held belief that the decay of a condensate state will result in N α-particles is challenged. We further conclude that unambiguously characterising excited states built on α-condensates is difficult, despite improvements in detector technology. This contribution has been presented during the ceremony of the Few-Body Systems Award for young professionals.

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“…Silicon chargedparticle detectors typically have an absolute energy resolution of 30−50 keV, meaning that differentiating between the three α-particles using such detectors can be difficult. An alternative approach is to measure the decay of the Hoyle state in a Time Projection Chamber (TPC) such as those in references [20][21][22]. In these cases, the relative angles between the three αparticles could be used to differentiate the two decay channels.…”

Section: 4mentioning

confidence: 99%

The Hoyle Family: break-up measurements to probe α-condensation in light nuclei

Smith

Bishop

Hirst

et al. 2020

SciPost Phys. Proc.

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The ^{12}12C Hoyle state is a candidate for \alphaα-condensation, due to its large volume and \alphaα-cluster structure. This paper discusses precision break-up measurements and how they can elucidate \alphaα-condensate structures. Two experiments are discussed in detail, firstly concerning the break-up of ^{12}12C and then the decays of heavier nuclei. With more theoretical input, and increasingly complex detector setups, precision break-up measurements can, in principle, provide insight into the structures of states in \alphaα-conjugate nuclei. At present, such searches have not delivered evidence for \alphaα-condensation in ^{12}12C or ^{16}16O.

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Texas Active Target (TexAT) detector for experiments with rare isotope beams

Cited by 40 publications

References 22 publications

A Fast Universal Kinematic Fitting Code for Low-Energy Nuclear Physics: FUNKI_FIT

A Fast Universal Kinematic Fitting Code for Low-Energy Nuclear Physics: FUNKI_FIT

The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

The Hoyle Family: break-up measurements to probe α-condensation in light nuclei

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