Clarification of large-strength transitions in the beta decay of 11Be - INSPIRE

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Clarification of large-strength transitions in the beta decay of 11Be

Nov 5, 2018

9 pages

Published in:

Phys.Rev.C 99 (2019) 4, 044316

Published: Apr 26, 2019

e-Print:

1811.01620 [nucl-ex]

DOI:

10.1103/PhysRevC.99.044316

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Abstract: (APS)

The shape and normalization of the β-delayed α spectrum from Be11 was measured by implanting Be11 ions in a segmented Si detector. The spectrum is found to be dominated by a well-known transition to the 3/2+ state at Ex=9.87MeV in B11. A significant increase in the observed decay strength towards the higher end of the Qβ window means, however, that the 9.87MeV state cannot alone be responsible for the transition. Using the R-matrix framework we find that the inclusion of an extra 3/2+ state at Ex=11.49(10)MeV is required to obtain a satisfactory description of the spectrum. Both states show large widths towards α decay, exhausting significant fractions of the Wigner limit, a typical signature of α clusterization. The observed Gamow-Teller strength indicates large overlaps between the two states and the ground state of Be11.

Note:

Several comments were added and Fig. 6 were modified to show fits and residuals for all three models

21.10.Gv
21.10.Re
23.40.-s
27.20.+n
Nuclear Structure

References(51)

Figures(7)

[1]

Halos and related structures

K. Riisager
(
- Aarhus U.
)

- Phys.Scripta T 152 (2013) 014001
•
e-Print:
- 1208.6415
•
DOI:
- 10.1088/0031-8949/2013/T152/014001

[2]

Energy levels of light nuclei

J.H. Kelley
(
- TUNL, Durham and
- NCSU, Raleigh
)
,
E. Kwan
(
- TUNL, Durham and
- Duke U.
)
,
J.E. Purcell
(
- TUNL, Durham and
- Georgia State U.
)
,
C.G. Sheu
(
- TUNL, Durham and
- Duke U.
)
,
H.R. Weller
(
- TUNL, Durham and
- Georgia State U.
)

- Nucl.Phys.A 880 (2012) 88-195
•
DOI:
- 10.1016/j.nuclphysa.2012.01.010

[3]

Half-Lives of Be-11 , C-15 , N-16 , O-19 , and Al-28

D.E. Alburger
(
- Brookhaven
)
,
G.A.P. Engelbertink
(
- Brookhaven
)

- Phys.Rev.C 2 (1970) 1594-1596
•
DOI:
- 10.1103/PhysRevC.2.1594

[4]

$^{11}Be(\beta p)$ , a quasi-free neutron decay?

K. Riisager
(
- Aarhus U.
)
,
O. Forstner
(
- Vienna U. and
- Stefan Meyer Inst. Subatomare Phys.
)
,
M.J.G. Borge
(
- CERN and
- Madrid, Inst. Estructura Materia
)
,
J.A. Briz
(
- Madrid, Inst. Estructura Materia
)
,
M. Carmona-Gallardo
(
- CSIC, Madrid
)

et al.

- Phys.Lett.B 732 (2014) 305-308
•
e-Print:
- 1402.1645
•
DOI:
- 10.1016/j.physletb.2014.03.062

[5]

Dark Matter Interpretation of the Neutron Decay Anomaly

Bartosz Fornal
(
- UC, San Diego
)
,
Benjamin Grinstein
(
- UC, San Diego
)

- Phys.Rev.Lett. 120 (2018) 19, 191801,
- Phys.Rev.Lett. 124 (2020) 21, 219901 (erratum)
•
e-Print:
- 1801.01124
•
DOI:
- 10.1103/PhysRevLett.120.191801

[6]

Examining the possibility to observe neutron dark decay in nuclei

M. Pfützner
(
- Warsaw U.
)
,
K. Riisager
(
- Aarhus U.
)

- Phys.Rev.C 97 (2018) 4, 042501
•
e-Print:
- 1803.01334
•
DOI:
- 10.1103/PhysRevC.97.042501

[7]

Delayed particles from the beta decay of Be-11

D.E. Alburger
(
- Brookhaven
)
,
D.John Millener
(
- Brookhaven
)
,
D.H. Wilkinson
(
- Brookhaven and
- Sussex U.
)

- Phys.Rev.C 23 (1981) 473-479
•
DOI:
- 10.1103/PhysRevC.23.473

[8]

Decay scheme of Be-11

D.John Millener
(
- Brookhaven
)
,
D.E. Alburger
(
- Brookhaven
)
,
E.K. Warburton
(
- Brookhaven
)
,
D.H. Wilkinson
(
- Brookhaven and
- Sussex U.
)

- Phys.Rev.C 26 (1982) 1167-1185
•
DOI:
- 10.1103/PhysRevC.26.1167

[9]

C.W. Li
,
R. Sherr

- Phys.Rev. 96 (1954) 389
•
DOI:
- 10.1103/PhysRev.96.389

[10]

Reactions Li-7 (alpha, n) B-10, Li-7 (alpha, alpha-prime) Li-7*, and B-10 (n, alpha) Li-7

Hans Bichsel
(
- Rice U.
)
,
T.W. Bonner
(
- Rice U.
)

- Phys.Rev. 108 (1957) 1025-1027
•
DOI:
- 10.1103/PhysRev.108.1025

[11]

S. Hinds
,
R. Middleton

- Proc.Phys.Soc. 74 (1959) 196
•
DOI:
- 10.1088/0370-1328/74/2/307

[12]

R. Cusson

- Nucl.Phys. 86 (1966) 481
•
DOI:
- 10.1016/0029-5582(66)90492-5

[13]

Study of 11 B at high excitations with the 9 Be( 3 He, p) 11 B and 9 Be(α, d) 11 B reactions

- Nucl.Phys.A 389 (1982) 301-323
•
DOI:
- 10.1016/0375-9474(82)90521-8

[14]

D. Smirnov
,
F. Aksouh
,
S. Dean
,
H.D. Witte
,
M. Huyse

et al.

- Nucl.Instrum.Methods Phys.Res. Sect. (2005) A547
•
DOI:
- 10.1016/j.nima.2005.03.165

[15]

Measurement of the branching ratio of the He-6 beta-decay channel into the alpha+d continuum

et al.

- Phys.Rev.C 80 (2009) 054307
•
DOI:
- 10.1103/PhysRevC.80.054307

[16]

Beta-delayed deuteron emission from Li-11: Decay of the halo

R. Raabe
(
- Leuven U.
)
,
A. Andreyev
(
- TRIUMF
)
,
M.J.G. Borge
(
- Madrid, Inst. Estructura Materia
)
,
L. Buchmann
(
- TRIUMF
)
,
P. Capel
(
- TRIUMF
)

et al.

- Phys.Rev.Lett. 101 (2008) 212501
•
e-Print:
- 0810.0779
•
DOI:
- 10.1103/PhysRevLett.101.212501

[17]

Precise branching ratios to unbound C-12 states from N-12 and B-12 beta-decays

et al.

- Phys.Lett.B 678 (2009) 459-464
•
DOI:
- 10.1016/j.physletb.2009.06.064

[18]

Precise Determination of the Unperturbed B-8 Neutrino Spectrum

et al.

- Phys.Rev.Lett. 108 (2012) 162502
•
DOI:
- 10.1103/PhysRevLett.108.162502

[19]

Measurement of the branching ratio for $\beta$ -delayed $\alpha$ decay of $^{16}$ N

et al.

- Phys.Lett.B 752 (2016) 296-301
•
e-Print:
- 1506.09020
•
DOI:
- 10.1016/j.physletb.2015.11.047

[20]

Focus on Exotic Beams at ISOLDE: A Laboratory Portrait

María J.G. Borge
(
- CERN
)
,
Klaus Blaum
(
- Heidelberg, Max Planck Inst.
)

- J.Phys.G 45 (2018) 1, 010301
•
DOI:
- 10.1088/1361-6471/aa990f

[21]

Chemically selective laser ion source for the CERN ISOLDE online mass separator facility

ISOLDE

Collaboration

•

V.I. Mishin

et al.

- Nucl.Instrum.Meth.B 73 (1993) 550-560
•
DOI:
- 10.1016/0168-583X(93)95839-W

[22]

O. Kester

- Nucl.Instrum.Methods Phys.Res. Sect. (2003) B204
•
DOI:
- 10.1016/S0168-583X(02)01886-4

[23]

P. Sellin
,
P. Woods
,
D. Branford
,
T. Davinson
,
N. Davis

et al.

- Nucl.Instrum.Methods Phys.Res. Sect. (1992) A311
•
DOI:
- 10.1016/0168-9002(92)90867-4

[24]

J. Büscher
,
J. Ponsaers
,
R. Raabe
,
M. Huyse
,
P.V. Duppen

et al.

- Nucl.Instrum.Methods Phys.Res. Sect. (2008) B266
•
DOI:
- 10.1016/j.nimb.2008.05.084

[25]

O. Tarasov
,
D. Bazin

- Nucl.Instrum.Methods Phys.Res. Sect. (2016) B376
•
DOI:
- 10.1016/j.nimb.2016.03.021

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