Detection of the Low Energy Recoil 3He in the Reaction 2H(8He,3He)7H

Chudoba, V.; Belogurov, S.; Bezbakh, A. A.; Biaré, D.; Фомичев, А. С.; Krupko, S. A.; Gazeeva, E. M.; Golovkov, M. S.; Gorshkov, A. V.; Grigorenko, L. V.; Kamiński, G.; Kiselev, O.; Kostyleva, D.; Kozlov, M. Yu.; Mauyey, B.; Mukha, I.; Nikolskii, E. Yu.; Piątek, Wojciech; Quynh, A. M.; Schetinin, V.; Serikov, A.; Sidorchuk, S. I.; Sharov, P. G.; Slepnev, R. S.; Stepantsov, S. V.; Świercz, Andrzej; Szymkiewicz, P.; Ter‐Akopian, G. M.; Wolski, R.; Zalewski, B.

doi:10.3103/s106287382004019x

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…The experiment was performed at the ACCULINNA-2 facility, FLNR, JINR, producing 26 AMeV 8 He beam and focusing it on the cryogenic deuterium target. The detection system was intended to identify the products of the 2 H( 8 He, 4 He) 6 H reaction and the further 6 H→ 3 H+3n decay.…”

Section: Methodsmentioning

confidence: 99%

“…The thin, 20 μm detectors in the side telescopes allowed one to reliably identify and reconstruct the low-energy particles (the recoil 4 He nuclei with energy ≥5 MeV) emitted from the target in the laboratory angular range between 8 • and 26 • , see Ref. [8]. The front telescope covered the lab angles ≤ 9 • .…”

Section: Methodsmentioning

confidence: 99%

“…The other possible "background" reaction 2 H( 8 He, 5 He) 5 H is the result of a triton transfer from The 7 He MM spectrum built with respect to the 4 He+3n threshold (black histogram). The green histogram in (b) corresponds to the low-lying events with E T < 10 MeV in the spectrum of 6 H. 8 He. This channel leads to the production of the targetlike 5 He and beam-like 5 H. The latter moves forward and decays into 3 H+n+n, which does not allow to measure it directly by our setup.…”

Section: "Background" Reaction Channels For 6 Hmentioning

confidence: 99%

“…This work is dedicated to the analysis of the diverse reaction channels occurring in the 8 He+ 2 H interaction characterized by the detection of the same products as those…”

Section: Introductionmentioning

confidence: 99%

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Interfering reaction channels observed in the ²H(⁸He,⁴He)⁶H reaction studies

Muzalevskii,

Bezbakh,

Nikolskii

et al. 2023

EPJ Web of Conf.

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In the recent work [Nikolskii et al., Phys. Rev. C 105, 064605 (2022)] the 2H(8He,4He)6H reaction was used for the study of the extreme neutron-rich 6H isotope. A broad bump was observed in the measured 6H spectrum interpreted as the broad overlapping ground and some low-lying states of this nuclide. There could be certain doubts in the interpretation of this work: in conditions of the limited phase space it is not impossible that the structure in the missing mass spectrum of 6H is actually induced by the resonant states populated by some other channels opened in the 8He+2H interaction. This work provides a body of the evidence for the correct channel identification and for the absence of the 6H resonances at energy ET = 0 − 3.5 MeV above the 3H+3n decay threshold. In addition the first strong experimental evidence is given that the 6H → 5H*+n → 3H+3n sequential decay is the dominating 6H decay channel.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: "Background" Reaction Channels For 6 Hmentioning

confidence: 99%

“…This work is dedicated to the analysis of the diverse reaction channels occurring in the 8 He+ 2 H interaction characterized by the detection of the same products as those…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interfering reaction channels observed in the ²H(⁸He,⁴He)⁶H reaction studies

Muzalevskii,

Bezbakh,

Nikolskii

et al. 2023

EPJ Web of Conf.

Self Cite

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“…A very thin 20 µm ∆E detector is needed for the 3 He identification, since its energy can be as small as 7 − 8 MeV. Because of fabrication inhomogeneity, inherent for such a thin silicon plates, the calibration thickness maps were determined for each of these thin detectors [26]. Fig.…”

Section: Reliability Of Channel Identification and Background Conditionsmentioning

confidence: 99%

Resonant states in $^{7}$H. I. Experimental studies of the $^2$H($^8$He,$^3$He) reaction

Muzalevskii,

Bezbakh,

Nikolskii

et al. 2020

Preprint

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The extremely neutron-rich system 7 H was studied in the direct 2 H( 8 He, 3 He) 7 H transfer reaction with a 26 AMeV secondary 8 He beam [1]. Missing mass and center-of-mass (c.m.) angular distributions of 7 H were reconstructed, as well as the momentum distribution of the 3 H fragment in the 7 H frame. In addition to the investigation reported in Ref.[1], we carried out another experiment with the same beam but a modified setup. In the second experiment the cross-check of the experimental calibration was performed by the studies of the 2 H( 10 Be, 3 He) 9 Li reaction. There is a solid experimental evidence of the population of two resonant states in 7 H at energies of 2.2(5) and 5.5(3) MeV relative to 3 H+4n threshold. Also, there are indications on the resonant states at 7.5(3) and 11.0(3) MeV. Based on the energy and angular distributions the weakly populated 2.2(5) MeV peak is assigned as the 7 H ground state. It is highly plausible that the firmly ascertained 5.5(3) MeV state is the 5/2 + member of the 7 H excitation doublet, built on the 2 + configuration of valence neutrons. The 7.5 MeV state can be a member of this 5/2 + -3/2 + doublet of excited states, which could not be resolved in Ref. [1] and which consequently appeared in [1] as a 6.5 MeV state of 7 H.

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