Nuclear structure at the proton drip line: Advances with nuclear decay studies

Blank, Β.; Borge, María José García

doi:10.1016/j.ppnp.2007.12.001

Cited by 227 publications

(170 citation statements)

References 361 publications

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“…In Fig. 25, the nuclear chart from the I (Z = 53) to Bi (Z = 83) isotopes is shown, where the experimentally known proton emitters [98] are highlighted.…”

Section: Proton Emittersmentioning

confidence: 99%

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

Xia

Lim

Zhao

et al. 2018

Atomic Data and Nuclear Data Tables

201

127

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The ground-state properties of nuclei with 8 Z 120 from the proton drip line to the neutron drip line have been investigated using the spherical relativistic continuum Hartree-Bogoliubov (RCHB) theory with the relativistic density functional PC-PK1. With the effects of the continuum included, there are totally 9035 nuclei predicted to be bound, which largely extends the existing nuclear landscapes predicted with other methods. The calculated binding energies, separation energies, neutron and proton Fermi surfaces, root-mean-square (rms) radii of neutron, proton, matter, and charge distributions, ground-state spins and parities are tabulated. The extension of the nuclear landscape obtained with RCHB is discussed in detail, in particular for the neutron-rich side, in comparison with the relativistic mean field calculations without pairing correlations and also other predicted landscapes. It is found that the coupling between the bound states and the continuum due to the pairing correlations plays an essential role in extending the nuclear landscape.The systematics of the separation energies, radii, densities, potentials and pairing energies of the RCHB calculations are also discussed. In addition, the α-decay energies and proton emitters based on the RCHB calculations are investigated.

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“…In Fig. 25, the nuclear chart from the I (Z = 53) to Bi (Z = 83) isotopes is shown, where the experimentally known proton emitters [98] are highlighted.…”

Section: Proton Emittersmentioning

confidence: 99%

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

Xia

Lim

Zhao

et al. 2018

Atomic Data and Nuclear Data Tables

201

127

View full text Add to dashboard Cite

show abstract

“…The nuclear properties in this region are shaped by the interplay between large β-decay Q values, low or negative proton separation energies, and the confining effects of the Coulomb barrier. The resulting characteristic phenomena include a variety of β-delayed particle emission channels, proton radioactivity and two-proton radioactivity [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014
Phys. Rev. C
79
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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“…This allows population of final states containing, apart from the beta particle and the associated (anti)neutrino, one or more particles (protons, neutrons or heavier particles) in continuum states and a recoiling final nucleus. Such processes allow many different physics questions to be probed experimentally -see [1,2] for recent reviews -and are normally referred to as beta-delayed particle emission. However, this name suggests a two-step process: the beta decay feeding resonance states in the daughter nucleus that subsequently decay by particle emission.…”

Section: Beta-particle Decay Mechanismmentioning

confidence: 99%

Beta decay to continuum states: the case of¹¹Be

Riisager

2014

EPJ Web of Conferences

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Abstract. Beta decay in exotic nuclei can lead to multi-particle final states. This contribution discusses briefly what decay mechanisms may enter in such decays and presents, on behalf of the IS541 collaboration at ISOLDE/CERN, preliminary data from a search for the beta-delayed proton decay of the halo nucleus 11 Be. Beta-particle decay mechanismThe Q-values for beta-decays increase as one moves towards the driplines and eventually become larger than the particle separation energies in the daughter nuclei. This allows population of final states containing, apart from the beta particle and the associated (anti)neutrino, one or more particles (protons, neutrons or heavier particles) in continuum states and a recoiling final nucleus. Such processes allow many different physics questions to be probed experimentally -see [1,2] for recent reviews -and are normally referred to as beta-delayed particle emission. However, this name suggests a two-step process: the beta decay feeding resonance states in the daughter nucleus that subsequently decay by particle emission. The other possible decay mechanism, beta decays feeding the continuum states directly, deserves consideration as well.Some indication for decays going directly into the continuum exist for halo nuclei, see [3][4][5] and references therein for details on the halo structure. The two-neutron halo nuclei 6 He and 11 Li appear both to have beta-delayed deuteron emission taking place directly into the continuum [1,6]. For 11 Li this process has a branching ratio of the order of 10 −4 , the low value mainly being due to the small energy window, whereas cancellation effects reduces the branching ratio for 6 He down to the 10 −6 level. The simple-minded model of the decays is that one of the two halo neutrons beta-decay into a proton and combines with the other one to form a deuteron. A complicating factor in the theoretical description of these two decays is therefore the "two neutron to deuteron" overlap that is sensitive to the correlations between the two neutrons. This is an interesting physics problem, but if the focus is on investigating the decay mechanism a much cleaner case would be the beta-delayed proton decay of a single-neutron halo nucleus. The 11 Be(βp) decayThe most favourable case is 11 Be(βp). Estimates of the branching ratio indicates that this will be a very rare process [7] due to the low energy available, see table 1; the branching ratio will in most a

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Nuclear structure at the proton drip line: Advances with nuclear decay studies

Cited by 227 publications

References 361 publications

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

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

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

Beta decay to continuum states: the case of¹¹Be

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Nuclear structure at the proton drip line: Advances with nuclear decay studies

Cited by 227 publications

References 361 publications

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

The limits of the nuclear landscape explored by the relativistic continuum Hartree–Bogoliubov theory

Proton spectroscopy ofNi48,Fe46, andCrPomorski1, Pfützner2, Dominik3 et al. 2014Phys. Rev. C791450View full textAdd to dashboardCite

Beta decay to continuum states: the case of11Be

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About

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

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

Beta decay to continuum states: the case of¹¹Be