Neutron drip line in the Ca region from Bayesian model averaging - INSPIRE

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Neutron drip line in the Ca region from Bayesian model averaging

Jan 22, 2019

6 pages

Published in:

Phys.Rev.Lett. 122 (2019) 6, 062502

Published: Feb 15, 2019

e-Print:

1901.07632 [nucl-th]

DOI:

10.1103/PhysRevLett.122.062502 (publication)

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Abstract: (APS)

The region of heavy calcium isotopes forms the frontier of experimental and theoretical nuclear structure research where the basic concepts of nuclear physics are put to stringent test. The recent discovery of the extremely neutron-rich nuclei around Ca60 O. B. Tarasov et al. [Phys. Rev. Lett. 121, 022501 (2018)10.1103/PhysRevLett.121.022501] and the experimental determination of masses for Ca55–57 S. Michimasa et al. [Phys. Rev. Lett. 121, 022506 (2018)10.1103/PhysRevLett.121.022506] provide unique information about the binding energy surface in this region. To assess the impact of these experimental discoveries on the nuclear landscape’s extent, we use global mass models and statistical machine learning to make predictions, with quantified levels of certainty, for bound nuclides between Si and Ti. Using a Bayesian model averaging analysis based on Gaussian-process-based extrapolations we introduce the posterior probability pex for each nucleus to be bound to neutron emission. We find that extrapolations for drip-line locations, at which the nuclear binding ends, are consistent across the global mass models used, in spite of significant variations between their raw predictions. In particular, considering the current experimental information and current global mass models, we predict that Ca68 has an average posterior probability pex≈76% to be bound to two-neutron emission while the nucleus Ca61 is likely to decay by emitting a neutron (pex≈46%).

Note:

Supplementary Material available upon request

Nuclear Physics

References(58)

Figures(3)

[1]

The Discovery of Isotopes

M. Thoennessen

[2]

J. Erler
,
N. Birge
,
M. Kortelainen
,
W. Nazarewicz
,
E. Olsen

et al.

- Nature 486 (2012) 509
•
DOI:
- 10.1038/nature11188

[3]

Global performance of covariant energy density functionals: ground state observables of even-even nuclei and the estimate of theoretical uncertainties

- Phys.Rev.C 89 (2014) 5, 054320
•
e-Print:
- 1404.4901
•
DOI:
- 10.1103/PhysRevC.89.054320

[4]

Nuclear Superfluidity, Pairing in Finite Systems

D.M. Brink
,
R.A. Broglia

[5]

Discovery of Ca60 and Implications For the Stability of Ca70

et al.

- Phys.Rev.Lett. 121 (2018) 2, 022501
•
DOI:
- 10.1103/PhysRevLett.121.022501

[6]

Evidence for a change in the nuclear mass surface with the discovery of the most neutron-rich nuclei with 17 <= Z <= 25

O.B. Tarasov
(
- Michigan State U., NSCL and
- Dubna, JINR
)
,
D.J. Morrissey
(
- Michigan State U., NSCL and
- Michigan State U., Dept. Chem.
)
,
A.M. Amthor
(
- Michigan State U., NSCL and
- Michigan State U.
)
,
T. Baumann
(
- Michigan State U., NSCL
)
,
D. Bazin
(
- Michigan State U., NSCL
)

et al.

- Phys.Rev.Lett. 102 (2009) 142501
•
e-Print:
- 0903.1975
•
DOI:
- 10.1103/PhysRevLett.102.142501

[7]

Production cross sections from 82Se fragmentation as indications of shell effects in neutron-rich isotopes close to the drip-line

et al.

- Phys.Rev.C 87 (2013) 054612
•
e-Print:
- 1303.7164
•
DOI:
- 10.1103/PhysRevC.87.054612

[8]

Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55–57

et al.

- Phys.Rev.Lett. 121 (2018) 2, 022506
•
DOI:
- 10.1103/PhysRevLett.121.022506

[9]

Dawning of the $N=32$ Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes

E. Leistenschneider
(
- TRIUMF and
- British Columbia U.
)
,
M.P. Reiter
(
- TRIUMF and
- U. Giessen, II. Phys. Inst.
)
,
S. Ayet San Andrés
(
- U. Giessen, II. Phys. Inst. and
- Darmstadt, GSI
)
,
B. Kootte
(
- TRIUMF and
- British Columbia U.
)
,
J.D. Holt
(
- TRIUMF
)

et al.

- Phys.Rev.Lett. 120 (2018) 6, 062503
•
e-Print:
- 1710.08537
•
DOI:
- 10.1103/PhysRevLett.120.062503

[10]

Coupled-cluster computations of atomic nuclei

- Rept.Prog.Phys. 77 (2014) 9, 096302
•
e-Print:
- 1312.7872
•
DOI:
- 10.1088/0034-4885/77/9/096302

[11]

The In-Medium Similarity Renormalization Group: A Novel Ab Initio Method for Nuclei

- Phys.Rept. 621 (2016) 165-222
•
e-Print:
- 1512.06956
•
DOI:
- 10.1016/j.physrep.2015.12.007

[12]

Self-consistent mean-field models for nuclear structure

- Rev.Mod.Phys. 75 (2003) 121-180
•
DOI:
- 10.1103/RevModPhys.75.121

[13]

Living on the edge of stability, the limits of the nuclear landscape

- Phys.Scripta T 152 (2013) 014022
•
e-Print:
- 1212.6364
•
DOI:
- 10.1088/0031-8949/2013/T152/014022

[14]

Challenges in Nuclear Structure Theory

Witold Nazarewicz
(
- Michigan State U. and
- Warsaw U.
)

- J.Phys.G 43 (2016) 4, 044002
•
e-Print:
- 1603.02490
•
DOI:
- 10.1088/0954-3899/43/4/044002

[15]

Evolution of shell structure in neutron-rich calcium isotopes

G. Hagen
(
- Oak Ridge and
- Tennessee U.
)
,
M. Hjorth-Jensen
(
- Oslo U. and
- Michigan State U., NSCL and
- Michigan State U.
)
,
G.R. Jansen
(
- Oslo U.
)
,
R. Machleidt
(
- Idaho U.
)
,
T. Papenbrock
(
- Tennessee U. and
- Oak Ridge
)

- Phys.Rev.Lett. 109 (2012) 032502
•
e-Print:
- 1204.3612
•
DOI:
- 10.1103/PhysRevLett.109.032502

[16]

Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes

- Phys.Rev.C 90 (2014) 2, 024312
•
e-Print:
- 1405.7602
•
DOI:
- 10.1103/PhysRevC.90.024312

[17]

Chiral two- and three-nucleon forces along medium-mass isotope chains

V. Somà
(
- Darmstadt, EMMI and
- Darmstadt, Tech. U. and
- IRFU, Saclay
)
,
A. Cipollone
(
- Surrey U.
)
,
C. Barbieri
(
- Surrey U.
)
,
P. Navrátil
(
- TRIUMF
)
,
T. Duguet
(
- IRFU, Saclay and
- Michigan State U. and
- Michigan State U., NSCL
)

- Phys.Rev.C 89 (2014) 6, 061301
•
e-Print:
- 1312.2068
•
DOI:
- 10.1103/PhysRevC.89.061301

[18]

Ab initio multireference in-medium similarity renormalization group calculations of even calcium and nickel isotopes

H. Hergert
(
- Ohio State U.
)
,
S.K. Bogner
(
- Michigan State U., NSCL and
- Michigan State U.
)
,
T.D. Morris
(
- Michigan State U., NSCL and
- Michigan State U.
)
,
S. Binder
(
- Darmstadt, Tech. U.
)
,
A. Calci
(
- Darmstadt, Tech. U.
)

et al.

- Phys.Rev.C 90 (2014) 4, 041302
•
e-Print:
- 1408.6555
•
DOI:
- 10.1103/PhysRevC.90.041302

[19]

Neutron and weak-charge distributions of the $^{48}$ Ca nucleus

et al.

- Nature Phys. 12 (2015) 2, 186-190
•
e-Print:
- 1509.07169
•
DOI:
- 10.1038/nphys3529

[20]

Unexpectedly large charge radii of neutron-rich calcium isotopes

R. F. Garcia Ruiz
(
- Leuven U.
)
,
M.L. Bissell
(
- Leuven U. and
- Manchester U.
)
,
K. Blaum
(
- Heidelberg, Max Planck Inst.
)
,
A. Ekström
(
- Oak Ridge and
- Tennessee U.
)
,
N. Frömmgen
(
- Mainz U., Inst. Kernchem.
)

et al.

- Nature Phys. 12 (2016) 594
•
e-Print:
- 1602.07906
•
DOI:
- 10.1038/nphys3645

[21]

Saturation with chiral interactions and consequences for finite nuclei

- Phys.Rev.C 96 (2017) 1, 014303
•
e-Print:
- 1704.02915
•
DOI:
- 10.1103/PhysRevC.96.014303

[22]

A nucleus-dependent valence-space approach to nuclear structure

et al.

- Phys.Rev.Lett. 118 (2017) 3, 032502
•
e-Print:
- 1607.03229
•
DOI:
- 10.1103/PhysRevLett.118.032502

[23]

Efimov Physics Around the Neutron-Rich $^{60}$ Ca Isotope

- Phys.Rev.Lett. 111 (2013) 13, 132501
•
e-Print:
- 1306.3661
•
DOI:
- 10.1103/PhysRevLett.111.132501

[24]

Bayesian approach to model-based extrapolation of nuclear observables

- Phys.Rev.C 98 (2018) 3, 034318
•
e-Print:
- 1806.00552
•
DOI:
- 10.1103/PhysRevC.98.034318

[25]

Towards a better parametrisation of Skyrme-like effective forces: A Critical study of the SkM force

- Nucl.Phys.A 386 (1982) 79-100
•
DOI:
- 10.1016/0375-9474(82)90403-1

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