Campaign of measurements to probe the good performance of the new array FARCOS for spectroscopy and correlations.

Acosta, L.; Andolina, R.; Auditore, L.; Boiano, C.; Cardella, G.; Castoldi, A.; D’Andrea, M.; Filippo, E. De; Luca, S. De; Dell’Aquila, D.; Francalanza, L.; Gnoffo, B.; Guazzoni, C.; Lanzalone, G.; Lombardo, I.; Martorana, N. S.; Minniti, T.; Norella, S.; Pagano, A.; Pagano, E. V.; Papa, M.; Parsani, T.; Pirrone, S.; Politi, G.; Porto, F.; Quattrocchi, L.; Rizzo, F.; Russotto, P.; Saccà, Giulia; Trifiró, A.; Trimarchi, M.; Verde, G.; Vigilante, M.; Zambon, P.

doi:10.1088/1742-6596/730/1/012001

Cited by 17 publications

(14 citation statements)

References 10 publications

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“…To measure the reaction products, two detector arrays were combined to provide a large solid angle coverage, high granularity system with good particle identification (PID) and energy range. These two arrays used were the CHIMERA [25] and FARCOS [26,27] detector systems, which combined 1192 Si-CsI(Tl) telescopes with 4 DSSD-DSSD-CsI(Tl) telescopes placed at forward angles. The combined system provided an excellent combination of high angular resolution at small angles and a high detector coverage.…”

Section: Experimental Investigationmentioning

confidence: 99%

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Experimental investigation of α condensation in light nuclei

Bishop¹,

Kokalova²,

Freer³

et al. 2019

Phys. Rev. C

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Background: Near-threshold α-clustered states in light nuclei have been postulated to have a structure consisting of a diffuse gas of α-particles which condense into the 0s orbital. Experimental evidence for such a dramatic phase change in the structure of the nucleus has not yet been observed. Method:To examine signatures of this α-condensation, a compound nucleus reaction using 160, 280, and 400 MeV 16 O beams impinging on a carbon target was used to investigate the 12 C( 16 O, 7α) reaction. This permits a search for near-threshold states in the α-conjugate nuclei up to 24 Mg.Results: Events up to an α-particle multiplicity of 7 were measured and the results were compared to both an Extended Hauser-Feshbach calculation and the Fermi break-up model. The measured multiplicity distribution exceeded that predicted from a sequential decay mechanism and had a better agreement with the multi-particle Fermi break-up model. Examination of how these 7α final states could be reconstructed to form 8 Be and 12 C(0 + 2 ) showed a quantitative difference in which decay modes were dominant compared to the Fermi break-up model. No new states were observed in 16 O, 20 Ne, and 24 Mg due to the effect of the N-α penetrability suppressing the total α-particle dissociation decay mode. Conclusion:The reaction mechanism for a high energy compound nucleus reaction can only be described by a hybrid of sequential decay and multi-particle breakup. Highly α-clustered states were seen which did not originate from simple binary reaction processes. Direct investigations of near-threshold states in N-α systems are inherently impeded by the Coulomb barrier prohibiting the observation of states in the N-α decay channel. No evidence of a highly clustered 15.1 MeV state in 16 O was observed from ( 28 Si , 12 C(0 + 2 )) 16 O(0 + 6 ) when reconstructing the Hoyle state from 3 α-particles. Therefore, no experimental signatures for α-condensation were observed. arXiv:1907.05471v2 [nucl-ex]

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Section: Experimental Investigationmentioning

confidence: 99%

“…To demonstrate this, the sum of the binary fission modes to the ground state (i.e. p+ 27 Al, 11 C+ 17 O etc.) was compared to the sum of those modes in Table II.…”

Section: B Multi-particle Break-upmentioning

confidence: 99%

Experimental investigation of α condensation in light nuclei

Bishop¹,

Kokalova²,

Freer³

et al. 2019

Phys. Rev. C

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“…The PDR can decay via both neutron and γ-ray emission; in this work, we focus on the study of the γ-ray decay channel. To detect the γ rays, we used the CHIMERA (Charged Heavy Ion Mass and Energy Resolving Array) multidetector [24], whereas to detect the 68 Ni and other heavy ions, produced in the reaction with 12 C, we used the FARCOS (Femtoscope ARray For COrrelations and Spectroscopy) array [25,26].…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of the Pygmy Dipole Resonance in the $^{68}$Ni Nucleus

Martorana¹,

Cardella²,

Lanza³

et al. 2018

Acta Phys. Pol. B

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It is known that the low-energy E1 strength, known as the Pygmy Dipole Resonance (PDR), can be excited by both isovector and isoscalar probes. In this work, we report on the results of an experiment, carried out at the LNS-INFN in Catania, with the aim to study the Pygmy Dipole Resonance induced in the 68 Ni nucleus through the interaction with a 12 C isoscalar target. The CHIMERA multidetector and the FARCOS array were used to detect, respectively, γ rays and charged particles. Details on the experimental setup , data analysis and results are reported.

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“…In recent years, the ∆E−E telescopes with silicon strip detectors (SSDs) or pixel detectors are widely used in nuclear reaction experiments because of the excellent energy and position resolution as well as the good particle identification capability. In terrestrial laboratories, many such large acceptance detector systems including INDRA [1,2], LASSA [3], HiRA [4], CHIMERA [5], MUST2 [6], FRACOS [7,8], FIZIA [9], and ChAKRA [10], etc, have been developed for the studies of nuclear reactions, nuclear structure and particle-particle correlation. In order to investigate the nuclear equation of state (nEoS), the HBT correlation, as well as the fast fission following heavy ion reactions (HIRs) [11,12], a compact spectrometer for heavy ion experiments (CSHINE) in the Fermi energy regime has been recently built [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Fig.6. (Color online) Energy calibration of heavy ions:2,3,6 He,6,7,8,9 Li,7,9,10 Be and10,11,12 B from CsI No. 8 in telescope No.…”

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Track Recognition for the $ΔE-E$ Telescopes with Silicon Strip Detectors

Guan,

Wang,

Diao

et al. 2021

Preprint

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For the high granularity and high energy resolution, Silicon Strip Detector (SSD) is widely applied in assembling telescopes to measure the charged particles in heavy ion reactions. In this paper, we present a novel method to achieve the track recognition in the SSD telescopes of the Compact Spectrometer for Heavy Ion Experiment (CSHINE). Each telescope consists of a singlesided silicon strip detector (SSSSD) and a double-sided silicon strip detector (DSSSD) backed by 3 × 3 CsI(Tl) crystals. Detector calibration, track reconstruction and coordinate transformation are implemented. Special decoding algorithm is developed for the multi track recognition procedure to deal with the multi-hit effect convoluted by charge sharing and the missing signals with certain probability. It is demonstrated that the track recognition efficiency of the method is ∼90% and ∼80% for the DSSSD-CsI and SSSSD-DSSSD events, respectively.

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Campaign of measurements to probe the good performance of the new array FARCOS for spectroscopy and correlations.

Cited by 17 publications

References 10 publications

Experimental investigation of α condensation in light nuclei

Experimental investigation of α condensation in light nuclei

Experimental Study of the Pygmy Dipole Resonance in the $^{68}$Ni Nucleus

Track Recognition for the $ΔE-E$ Telescopes with Silicon Strip Detectors

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