Proton radioactivity of nuclei with atomic numbers Z = 51–91 and mass number 104–211

2021 ◽  
pp. 2150016
Author(s):  
D. N. Poenaru ◽  
R. A. Gherghescu
Keyword(s):  
Mass Number ◽  
Drip Line ◽  
Neutron Drip Line ◽  
Mass Model ◽  
Proton Drip Line ◽  
Cluster Radioactivity ◽  
Proton Radioactivity ◽  
Asymmetric Fission ◽  
Good Agreement

Proton radioactivity of neutron-deficient nuclei with atomic numbers [Formula: see text]–91 and mass number 104–211 is investigated using the analytical super-asymmetric fission (ASAF) model — a model used to study [Formula: see text]-decay and cluster radioactivity since 1984. The experimental [Formula: see text] values are compared with calculated ones based on WS4 (Y. Z. Wang et al., 2014–2015), and in few cases KTUY05 (H. Koura et al., 2005) mass models. Proton drip-line and neutron drip-line are determined using the WS4 mass model. We compare the calculated results with experimental half-lives, showing good agreement.

scholarly journals Systematic study of two-proton radioactivity half-lives based on a modified Gamow-like model

2021 ◽  
Vol 30 (08) ◽  
Author(s):  
Hong-Ming Liu ◽  
You-Tian Zou ◽  
Xiao Pan ◽  
Biao He ◽  
Xiao-Hua Li
Keyword(s):  
Experimental Data ◽  
Systematic Study ◽  
Liquid Drop ◽  
Drip Line ◽  
Liquid Drop Model ◽  
Proton Drip Line ◽  
Proton Radioactivity ◽  
Good Agreement

In this work, we systematically study the two-proton ([Formula: see text]) radioactivity half-lives of nuclei close to the proton drip line within a modified Gamow-like model. Using this model, the calculated [Formula: see text] radioactivity half-lives can well reproduce the experimental data. Moreover, we blackuse this model to predict the [Formula: see text] radioactivity half-lives of 22 candidates blackwhose [Formula: see text] radioactivity is energetically allowed or observed but not yet quantized in evaluated nuclear properties table NUBASE2016. blackThe predicted results are in good agreement with the ones obtained by using Gamow-like model, effective liquid drop model (ELDM), generalized liquid drop model (GLDM) as well as a four-parameter formula.

scholarly journals Proton drip line evaluation by complementing the Finite Range Droplet Model with neural networks

2020 ◽  
Vol 15 ◽  
pp. 258
Author(s):  
S. Athanasopoulos ◽  
E. Mavrommatis ◽  
K. A. Gernoth ◽  
J. W. Clark
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Atomic Mass ◽  
Drip Line ◽  
Finite Range ◽  
Mass Excess ◽  
Droplet Model ◽  
Mass Model ◽  
Proton Drip Line ◽  
The One

We evaluate the location of the proton drip line in the regions 31≤Z≤49 and 73≤Z≤91 based on the one- and two-proton separation energies predicted by our latest Hybrid Mass Model. The latter is constructed by complementing the mass-excess values ΔM predicted by the Finite Range Droplet Model (FRDM) of Moeller et al. with a neural network model trained to predict the differences ΔMexp − ΔMFRDM between these values and the experimental mass-excess values published in the 2003 Atomic Mass Evaluation AME03.

Two-proton radioactivity within Coulomb and proximity potential model

2021 ◽  
Author(s):  
De-Xing Zhu ◽  
Hong-Ming Liu ◽  
Yang-Yang Xu ◽  
You-Tian Zou ◽  
Xi-Jun Wu ◽  
...  
Keyword(s):  
Potential Model ◽  
Liquid Drop ◽  
Theoretical Models ◽  
Parent Nucleus ◽  
Drip Line ◽  
Liquid Drop Model ◽  
Empirical Formulas ◽  
Proximity Potential ◽  
Proton Radioactivity ◽  
Good Agreement

Abstract In the present work, considering the preformation probability of the emitted two protons in the parent nucleus, we extend the Coulomb and proximity potential model (CPPM) to systematically study two-proton (2p) radioactivity half-lives of the nuclei close to proton drip line, while the proximity potential is chosen as Prox.81 proposed by Blocki et al. in 1981. Furthermore, we apply this model to predict the half-lives of possible 2p radioactive candidates whose 2p radioactivity is energetically allowed or observed but not yet quantified in the evaluated nuclear properties table NUBASE2016. The predicted results are in good agreement with those from other theoretical models and empirical formulas, namely the effective liquid drop model (ELDM), generalized liquid drop model (GLDM), Gamow-like model, Sreeja formula and Liu formula.

Proton radioactivity and the proton drip line

2005 ◽  
Vol 752 ◽  
pp. 223-226 ◽  
Author(s):  
Lídia S. Ferreira ◽  
Enrico Maglione
Keyword(s):  
Drip Line ◽  
Proton Drip Line ◽  
Proton Radioactivity

Nuclear structure studies at the proton drip line via proton radioactivity studies

2005 ◽  
Vol 241 (1-4) ◽  
pp. 185-189 ◽  
Author(s):  
C.R. Bingham ◽  
M.N. Tantawy ◽  
J.C. Batchelder ◽  
M. Danchev ◽  
T.N. Ginter ◽  
...  
Keyword(s):  
Nuclear Structure ◽  
Drip Line ◽  
Proton Drip Line ◽  
Proton Radioactivity

scholarly journals Measurement of proton-distribution radii of neutron-rich nitrogen isotopes

2019 ◽  
Vol 223 ◽  
pp. 01003
Author(s):  
Soumya Bagchi ◽  
Rituparna Kanungo ◽  
Wataru Horiuchi ◽  
Gaute Hagen ◽  
Titus D. Morris ◽  
...  
Keyword(s):  
Shell Model ◽  
Cross Section ◽  
Nitrogen Isotopes ◽  
Drip Line ◽  
Neutron Skin ◽  
Neutron Halo ◽  
Mean Square ◽  
Neutron Drip Line ◽  
Model Calculations ◽  
Good Agreement

Measurement of root-mean-square radii of proton distributions of 17–22N from charge-changing cross section shows the emergence of thick neutron skin towards the neutron-drip line. Signature of N = 14 shell gap has been found in nitrogen isotopes along with the emergence of neutron halo in 22N. The measured radii are in good agreement with the shell model calculations.

scholarly journals NEUTRON AND PROTON DRIP LINES USING THE MODIFIED BETHE–WEIZSÄCKER MASS FORMULA

2004 ◽  
Vol 13 (04) ◽  
pp. 747-758 ◽  
Author(s):  
D. N. BASU
Keyword(s):  
Mass Formula ◽  
Drip Line ◽  
Magic Numbers ◽  
Neutron Drip Line ◽  
Proton Drip Line ◽  
Rp Process ◽  
R Process

Proton and neutron separation energies are calculated using the extended Bethe–Weizsäcker mass formula. This modified Bethe–Weizsäcker mass formula describes minutely the positions of all the old and the new magic numbers. It accounts for the disappearance of some traditional magic numbers for neutrons and provides extra stability for some new neutron numbers. The neutron and proton drip lines are predicted using this extended Bethe–Weizsäcker mass formula. The implications of the proton drip line on the astrophysical rp-process and of the neutron drip line on the astrophysical r-process are discussed.

scholarly journals Pseudospin symmetry in Zr and Sn isotopes from the proton drip line to the neutron drip line

1999 ◽  
Vol 59 (1) ◽  
pp. 154-163 ◽  
Author(s):  
J. Meng ◽  
K. Sugawara-Tanabe ◽  
S. Yamaji ◽  
A. Arima
Keyword(s):  
Pseudospin Symmetry ◽  
Drip Line ◽  
Neutron Drip Line ◽  
Proton Drip Line

Two-proton radioactivity, a new probe for structure at the proton drip-line

2013 ◽  
Author(s):  
J. Giovinazzo ◽  
P. Ascher ◽  
L. Audirac ◽  
B. Blank ◽  
C. Dossat ◽  
...  
Keyword(s):  
Drip Line ◽  
Proton Drip Line ◽  
Proton Radioactivity

Search for direct two-proton radioactivity from Ti isotopes at the proton drip line

1990 ◽  
Vol 519 (3) ◽  
pp. 529-547 ◽  
Author(s):  
C. Détraz ◽  
R. Anne ◽  
P. Bricault ◽  
D. Guillemaud-Mueller ◽  
M. Lewitowicz ◽  
...  
Keyword(s):  
Drip Line ◽  
Proton Drip Line ◽  
Proton Radioactivity
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