HeCTOr: the 3He Cryogenic Target of Orsay for direct nuclear reactions with radioactive ion beams

Galtarossa, F.; Pierens, M.; Assié, M.; Delpech, V.; Galet, F.; Saugnac, H.; Brugnara, D.; Ramos, D.; Beaumel, D.; Blache, Philippe; Chabot, M.; Châtelet, François; Clément, E.; Flavigny, F.; Giret, A.; Gottardo, A.; Goupil, J.; Lemasson, A.; Matta, A.; Ménager, Loïc; Mengoni, D.; Rindel, E.

doi:10.1016/j.nima.2021.165830

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…The completeness of the experimental setup played a key role in the reconstruction of the reaction, providing detection and identification of the heavy and light fragments. The radioactive 46 Ar beam provided by the SPIRAL1 facility in GANIL (France) with an rate of ≈ 40 kHz impinged on a 3 He cryogenic target [10], HECTOR. Figure 5 shows the extent of the apparatus.…”

Section: The Experimental Setupmentioning

confidence: 99%

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction

Brugnara,

Gottardo,

Assié

et al. 2023

J. Phys.: Conf. Ser.

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The discrepancy between shell-model calculations and intermediate-energy Coulomb excitation measurements in 46Ar still stands as an unsolved puzzle in understanding the N = 28 shell evolution. This phenomenon has significant relevance considering the remarkable achievements of the shell model and the SDPF-U interaction in the region which is able to predict the fading of the N = 28 shell gap in neutron-rich 44S. Recent measurements narrowed down this discrepancy to an overestimation of the proton amplitude to the quadrupole transition matrix element. The current work aims to propose a different perspective on the puzzle, by studying a direct proton-transfer reaction on 46Ar as a means to directly probe the proton wavefunction of the ground state this isotope. By measuring the amount of l = 0 transfer to the ground state (1/2+) of 47K with respect to the l = 2 to the first excited state (3/2+), we aim to gain insight into the ground state proton wavefunction of 46Ar. We will present a brief description of the experiment performed at the SPIRAL1 facility in GANIL (France). The experimental apparatus allowed a full reconstruction of the two-body reaction thanks to the combination of AGATA, VAMOS, MUGAST, CATS2, and HECTOR.

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Section: The Experimental Setupmentioning

confidence: 99%

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction

Brugnara,

Gottardo,

Assié

et al. 2023

J. Phys.: Conf. Ser.

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Fast trajectory reconstruction techniques for the large acceptance magnetic spectrometer VAMOS++

Lemasson

Rejmund

2023

Nuclear Instruments and Methods in Physics Research Section A:

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Advances in nuclear structure via charged particle reactions with AGATA

et al. 2023

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In recent decades, $$\gamma $$ γ -ray spectroscopy has undergone a major technological leap forward, namely the technique of $$\gamma $$ γ -ray tracking, and has attained a sensitivity that is two orders of magnitude larger than that provided by the former generation of Compton-shielded arrays. Indeed the gain is comparable with the achievements since the dawn of $$\gamma $$ γ -ray spectroscopy. Such sensitivity can be further heightened by coupling $$\gamma $$ γ -ray spectrometers to other detectors that record complementary reaction products such as light-charged particles for transfer reactions and scattered ions for Coulomb excitation measurements. Nucleon transfer reactions offer an excellent mean to probe the energies of shell model single-particle orbitals and to study migration in energy of these orbitals as we venture away from stability. Such measurements can also estimate the cross sections of processes relevant to stellar evolution and nucleosynthesis. The measurement of $$\gamma $$ γ rays in coincidence with particles provides also information on the decay channel for unbound systems, which constitutes a useful input for astrophysics and nuclear structure near the drip-lines. Coulomb-excitation studies make it possible to infer collective structure in nuclei and to extract deformation properties of, in particular, open-shell systems. Here, selected examples will be presented, highlighting the power of these types of experiments when $$\gamma $$ γ -ray observation is included. The development of the experimental methods is reviewed, showing the results achieved before the advent of $$\gamma $$ γ -ray tracking. Examples of more recent experiments that have successfully exploited $$\gamma $$ γ -ray tracking with AGATA are then presented as showcases for the outstanding performance of the composite detection systems. The outlook for experiments using newly developed devices such as GRIT and other detectors such as SPIDER is described.

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HeCTOr: the 3He Cryogenic Target of Orsay for direct nuclear reactions with radioactive ion beams

Cited by 3 publications

References 32 publications

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction

Fast trajectory reconstruction techniques for the large acceptance magnetic spectrometer VAMOS++

Advances in nuclear structure via charged particle reactions with AGATA

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HeCTOr: the 3He Cryogenic Target of Orsay for direct nuclear reactions with radioactive ion beams

Cited by 3 publications

References 32 publications

The 46Ar(3He, d)47K direct reaction as a probe of the 46Ar proton wavefunction

The 46Ar(3He, d)47K direct reaction as a probe of the 46Ar proton wavefunction

Fast trajectory reconstruction techniques for the large acceptance magnetic spectrometer VAMOS++

Advances in nuclear structure via charged particle reactions with AGATA

Contact Info

Product

Resources

About

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction

The ⁴⁶Ar(³He, d)⁴⁷K direct reaction as a probe of the ⁴⁶Ar proton wavefunction