First evidence for the two-proton decay of 45Fe

Pfützner, M.; Badura, E.; Bingham, C. R.; Blank, Β.; Chartier, M.; Geißel, H.; Giovinazzo, J.; Grigorenko, L. V.; Grzywacz, R.; Hellström, M.; Janas, Z.; Kurcewicz, J.; Lalleman, A. S.; Mazzocchi, C.; Mukha, I.; Münzenberg, G.; Plettner, C.; Roeckl, E.; Rykaczewski, K. P.; Schmidt, Karl‐Heinz; Simon, R. S.; Stănoiu, M.; Thomas, J. C.

doi:10.1140/epja/i2002-10033-9

Cited by 259 publications

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“…[8]. These events were disentangled by making a slice projection from the measured correlations with the gate θ p2-O < 45 mrad [peak (1) in Fig. 3(b)].…”

Section: (B) and 2(c) The P-himentioning

confidence: 99%

“…In contrast, 1p emitters in heavy nuclei live much longer because of the much higher Coulomb barriers. Unexpectedly long half-lives have been also reported for the 2p emitters 45 Fe, 54 Zn, 19 Mg, and 94m Ag [1][2][3][4]. A quantum-mechanical theory of the 2p radioactivity based on a three-body model [5] explains them as a result of the considerable influence of few-body centrifugal and Coulomb barriers together with nuclear structure effects.…”

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confidence: 99%

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Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
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43
13
49
1
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“…[8]. These events were disentangled by making a slice projection from the measured correlations with the gate θ p2-O < 45 mrad [peak (1) in Fig. 3(b)].…”

Section: (B) and 2(c) The P-himentioning

confidence: 99%

mentioning

confidence: 99%

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
Self Cite
43
13
49
1
View full text Add to dashboard Cite

show abstract

“…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: 96%

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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“…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%

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

et al. 2014
Phys. Rev. C
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79
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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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First evidence for the two-proton decay of 45Fe

Cited by 259 publications

References 0 publications

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
Self Cite
43
13
49
1
View full text Add to dashboard Cite

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
Self Cite
43
13
49
1
View full text Add to dashboard Cite

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
79
1
45
0
View full text Add to dashboard Cite

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First evidence for the two-proton decay of 45Fe

Cited by 259 publications

References 0 publications

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16Mukha1, Timofeyuk2, Sümmerer3 et al. 2009Phys. Rev. CSelf Cite4313491View full textAdd to dashboardCite

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16Mukha1, Timofeyuk2, Sümmerer3 et al. 2009Phys. Rev. CSelf Cite4313491View full textAdd to dashboardCite

Three-body model for the two-neutron emission ofBe16

Proton spectroscopy ofNi48,Fe46, andCrPomorski1, Pfützner2, Dominik3 et al. 2014Phys. Rev. CSelf Cite791450View full textAdd to dashboardCite

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Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
Self Cite
43
13
49
1
View full text Add to dashboard Cite

Observation of narrow states in nuclei beyond the proton drip line:F15andNe16
Mukha¹,
Timofeyuk²,
Sümmerer³
et al. 2009
Phys. Rev. C
Self Cite
43
13
49
1
View full text Add to dashboard Cite

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

et al. 2014
Phys. Rev. C
Self Cite
79
1
45
0
View full text Add to dashboard Cite