Two-Proton Radioactivity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">F</mml:mi><mml:mprescripts /><mml:none /><mml:mn mathvariant="normal">45</mml:mn></mml:mmultiscripts><mml:mi mathvariant="normal">e</mml:mi></mml:math>

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

doi:10.1103/physrevlett.89.102501

Cited by 248 publications

(151 citation statements)

References 24 publications

(36 reference statements)

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“…Two-proton decay from the ground state was experimentally observed for the first time in 45 Fe, over forty years after the initial prediction [4,5]. Since then, many examples of two-proton decay have been seen from the ground state [6,7,8], as well as from excited states [9].…”

Section: Introductionmentioning

confidence: 93%

Three-body model for the two-neutron emission ofBe16

2017

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Background: While diproton decay was first theorized in 1960 and first measured in 2002, it was first observed only in 2012.The measurement of 14 Be in coincidence with two neutrons suggests that 16 Be does decay through the simultaneous emission of two strongly correlated neutrons.Purpose: In this work, we construct a full three-body model of 16 Be (as 14 Be + n + n) in order to investigate its configuration in the continuum and in particular the structure of its ground state.Method: In order to describe the three-body system, effective n-14 Be potentials were constructed, constrained by the experimental information on 15 Be. The hyperspherical R-matrix method was used to solve the three-body scattering problem, and the resonance energy of 16 Be was extracted from a phase shift analysis.Results: In order to reproduce the experimental resonance energy of 16 Be within this three-body model, a three-body interaction was needed. For extracting the width of the ground state of 16 Be, we use the full width at half maximum of the derivative of the three-body phase shifts and the width of the three-body elastic scattering cross section. Conclusions:Our results confirm a dineutron structure for 16 Be, dependent on the internal structure of the subsystem 15 Be.

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Section: Introductionmentioning

confidence: 93%

Three-body model for the two-neutron emission ofBe16

2017

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“…Its mechanism is not fully understood and its potential to reveal nuclear-structure information is not firmly established yet. Up to now, the simultaneous two-proton (2p) emission from the ground state was unambiguously observed in 6 Be, 19 Mg, 45 Fe, 48 Ni, and 54 Zn [1]. It is expected, however, that this decay mode * pfutzner@fuw.edu.pl should be observable for almost every even-Z element up to tellurium [7].…”

Section: Introductionmentioning

confidence: 99%

“…We found N F e = 503, while the number of projectiles, N proj , was determined by a Faraday cup to be N proj = 8 × 10 16 . The target of d t = 580 mg/cm 2 thickness was made of natural nickel with A t = 58.7 g. The transmission T 1 was calculated by LISE++ code [22] using the momentum distribution according to the model of Morrisey [27], which yielded T 1 = 0.13 (6). The large uncertainty of this value is dominated by the uncertainty of the shape of the momentum distribution.…”

Section: Production Cross-sectionmentioning

confidence: 99%

“…The latter process, discovered 12 years ago [5,6] is still not well known. Its mechanism is not fully understood and its potential to reveal nuclear-structure information is not firmly established yet.…”

Section: Introductionmentioning

confidence: 99%

“…It is expected, however, that this decay mode * pfutzner@fuw.edu.pl should be observable for almost every even-Z element up to tellurium [7]. In the first experiments the evidence for 2p decay was obtained by means of arrays of Si detectors which only allowed for a determination of the total decay energy and the decay time [5,6,8]. To fully explore the physical information carried by the two protons, however, one has to record their momenta separately.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Proton spectroscopy ofNi48,Fe46, andCr
Pomorski
¹
,
Pfützner
²
,
Dominik
³

et al. 2014
Phys. Rev. C
Self Cite
75
1
45
0
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Results of decay spectroscopy on nuclei in vicinity of the doubly magic 48 Ni are presented. The measurements were performed with a Time Projection Chamber with optical readout which records tracks of ions and protons in the gaseous volume. Six decays of 48 Ni, including four events of twoproton ground-state radioactivity were recorded. An advanced reconstruction procedure yielded the 2p decay energy for 48 Ni of Q2p = 1.29(4) MeV. In addition, the energy spectra of β-delayed protons emitted in the decays of 44 Cr and 46 Fe, as well as half-lives and branching ratios were determined. The results were found to be consistent with the previous measurements made with Si detectors. A new proton line in the decay of 44 Cr corresponding to the decay energy of 760 keV is reported. The first evidence for the β2p decay of 46 Fe, based on one clear event, is shown.

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Exotic Nuclear Beam Facilities

Geißel

Huyse

Münzenberg

et al. 2003

Digital Encyclopedia of Applied Physics

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The knowledge of exotic nuclei properties is essential for the understanding of the strong interaction and the element synthesis in the cosmos. Exotic nuclides are short lived and therefore, cannot be found on Earth but are still produced in stars. To study such atomic nuclei, one has to produce them with nuclear reactions in the laboratory and to separate them with special tools, from all the inevitable abundant background. The production and separation of these exotic nuclear beams can be performed with in‐flight or isotope separation on line facilities or hybrid systems of these two main scenarios. An exotic nuclear beam facility consists mainly of a combination of the production and the separation part as well as a post‐acceleration unit for the case that the experiment needs beams with kinetic energies and emittances different from that what the separator can provide. The challenge to investigate exotic nuclei is that they are characterized by very low production cross sections and short half‐lives. Different reactions to create exotic nuclei, and the physics and techniques of modern separation methods are discussed. We present the recent progress made in studying exotic nuclei by new accelerator developments, powerful separators combined with high‐resolution spectrometers and storage devices, and efficient detector systems. This chapter ends with the description of some recent discoveries with exotic nuclei and the motivation for the next‐generation facilities.

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Two-Proton Radioactivity ofF45e

Cited by 248 publications

References 24 publications

Three-body model for the two-neutron emission ofBe16

Three-body model for the two-neutron emission ofBe16

Proton spectroscopy ofNi48,Fe46, andCr
Pomorski
¹
,
Pfützner
²
,
Dominik
³

et al. 2014
Phys. Rev. C
Self Cite
75
1
45
0
View full text Add to dashboard Cite

Exotic Nuclear Beam Facilities

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About

Two-Proton Radioactivity ofF45e

Cited by 248 publications

References 24 publications

Three-body model for the two-neutron emission ofBe16

Three-body model for the two-neutron emission ofBe16

Proton spectroscopy ofNi48,Fe46, andCrPomorski1, Pfützner2, Dominik3 et al. 2014Phys. Rev. CSelf Cite751450View full textAdd to dashboardCite

Exotic Nuclear Beam Facilities

Contact Info

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About

Proton spectroscopy ofNi48,Fe46, andCr
Pomorski
¹
,
Pfützner
²
,
Dominik
³

et al. 2014
Phys. Rev. C
Self Cite
75
1
45
0
View full text Add to dashboard Cite