Two-proton radioactivity: the case of 45Fe

Giovinazzo, J.; Blank, Β.; Borcea, C.; Brown, B. A.; Chartier, M.; Czájkowski, S.; Fleury, A.; Grzywacz, R.; Lewitowicz, M.; Jiménez, M.; Маслов, В. А.; Santos, F. de Oliveira; Pfützner, M.; Pravikoff, M.S.; Stănoiu, M.; Thomas, J.‐C.

doi:10.1063/1.1615164

Cited by 3 publications

(4 citation statements)

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“…Due to the short half-life of the isomeric state, the ionization signal from the emitted proton is registered together with the huge signal of the ion implantation (three orders of magnitude larger), making the detection impossible with standard techniques such as silicon detectors (e.g. 11 , 15 ). Using ACTAR TPC, the proton signal is clearly visible when the particle track projection on the collection plane creates a signal on different pads of the detector (Fig.…”

Section: Resultsmentioning

confidence: 99%

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4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

et al. 2021

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Proton radioactivity was discovered exactly 50 years ago. First, this nuclear decay mode sets the limit of existence on the nuclear landscape on the neutron-deficient side. Second, it comprises fundamental aspects of both quantum tunnelling as well as the coupling of (quasi)bound quantum states with the continuum in mesoscopic systems such as the atomic nucleus. Theoretical approaches can start either from bound-state nuclear shell-model theory or from resonance scattering. Thus, proton-radioactivity guides merging these types of theoretical approaches, which is of broader relevance for any few-body quantum system. Here, we report experimental measurements of proton-emission branches from an isomeric state in 54mNi, which were visualized in four dimensions in a newly developed detector. We show that these decays, which carry an unusually high angular momentum, ℓ = 5 and ℓ = 7, respectively, can be approximated theoretically with a potential model for the proton barrier penetration and a shell-model calculation for the overlap of the initial and final wave functions.

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Section: Resultsmentioning

confidence: 99%

“…In this decay, the proton has to carry away impressive 9ħ units of angular momentum, ℓ = 9, to decay into 52 Fe, with only a 1.5% branch to its 0 + ground state known. In the same region of the nuclear chart, two-proton radioactivity was discovered from the ground states of 45 Fe 11 , 12 , 48 Ni 13 , 14 and 54 Zn 15 , 16 .…”

Section: Introductionmentioning

confidence: 94%

4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

et al. 2021

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“…The other type is the true 2p radioactivity whose Q 2p > 0 and Q p < 0, which is featured in that the 1p radioactivity is strongly forbidden or substantially suppressed, and the energy level of the 2p emitting channel is lower than that of 1p radioactivity [32]. With the development of experimental facilities and detection technologies, the true 2p radioactivity was first reported in 2002 via the experiments of 45 Fe projectile fragmentation and in-flight identification performed at GANIL [33] and GSI [34], respectively. Later, the true 2p radioactivity of 19 Mg [35], 48 Ni [36], 54 Zn [37] and 67 Kr [38] were also detected in different experiments.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted two-proton radioactivity

Zou,

Cheng,

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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In this work, we systematically investigate the two-proton ($2p$) radioactivity assisted by an ultra-intense laser field within a deformed one-parameter model (OPM). The results show that the ultra-intense laser hardly affects the preformation probability of the emitted $2p$-pair, but it can change the $2p$ radioactive half-lives to a finite extent by affecting the penetrability probability. Moreover, we compare the responses of different $2p$ radioactivity nuclei to the laser field, and it is found that the $2p$ radioactivity of nuclei with a low decay width are more easily influenced by the intense laser field. Furthermore, the effects of different physical parameters of a laser pulse on the $2p$ radioactivity were also discussed. The calculations indicate that the lasers characterized by shorter wavelengths and higher intensities exert a more significant influence on the rate of the average change in pulse duration. Finally, we extended the deformed OPM to predict the half-lives of $2p$ radioactivity candidates and identified the possible experimental objects of the laser-assisted $2p$ radioactivity. This study may promote the possibility of future experimental investigations on extensive facilities like GSI and ELI-NP, etc.

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“…Observing these one proton emitters, it is evidently found that the rich-proton odd-Z nuclei between Z = 51 and Z = 83 are more likely to emit a proton and form a new nucleus [5][6][7][8][9][10]. However, for two proton radioactivity, it was not until 2002 that this exotic phenomenon was firstly observed in experiments performed at GANIL [11] and GSI [12]. Up to now, there are 8 two proton radioactivity nuclei being discovered in different experiments [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Favored one proton radioactivity within a one-parameter model*

Zou

Pan²,

Li³

et al. 2022

Commun. Theor. Phys.

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In present work, a phenomenological one-parameter model (OPM) based on the Wentzel-Kramers-Brillouin (WKB) theory is applied to study the favored one proton radioactivity (the orbital angular momentum l taken away by the emitted one proton equals to zero) half-lives. The calculated results can reproduce the experimental data well within a factor of ∼ 3. In addition, we extend the OPM to predict the half-lives of possible favored one proton radioactivity nuclei whose decay is energetically allowed or observed but not quantified in NUBASE2020. For comparison, a universal decay law of one proton radioactivity (UDLP) is also used. It is obviously found that our predicted results are close to the ones using UDLP. The predictions are helpful for searching for the new nuclides with favored one proton radioactivity.

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Two-proton radioactivity: the case of 45Fe

Cited by 3 publications

References 0 publications

4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

Laser-assisted two-proton radioactivity

Favored one proton radioactivity within a one-parameter model*

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