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Journal articles
Precision mass measurements of $^{67}$Fe and $^{69,70}$Co : Nuclear structure toward N = 40 and impact on r -process reaction rates
L. Canete
S. Giraud
1
A. Kankainen
B. Bastin
1
F. Nowacki
2
A. Poves
P. Ascher
3
T. Eronen
V. Alcindor
1
A. Jokinen
A. Khanam
I.D. Moore
D. Nesterenko
Francois de Oliveira Santos
1
H. Penttilä
C. Petrone
I. Pohjalainen
A. de Roubin
V. Rubchenya
M. Vilen
J. Äystö
L. Canete
Author
S. Giraud 1
Author
A. Kankainen
Author
B. Bastin 1
Author IdHAL : beyhan-bastin ORCID : https://orcid.org/0000-0001-5959-0875
F. Nowacki 2
Author
A. Poves
Author
P. Ascher 3
Author IdHAL : pauline-ascher ORCID : https://orcid.org/0000-0002-1990-0848
T. Eronen
Author
D. Nesterenko
Author
Francois de Oliveira Santos 1
Author IdHAL : francois-de-oliveira-santos ORCID : https://orcid.org/0000-0003-4539-5985
H. Penttilä
Author
C. Petrone
Author IdHAL : caterina-petrone IdRef : https://www.idref.fr/156862794
J. Äystö
Author
1
GANIL - Grand Accélérateur National d'Ions Lourds (Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5 - France)
- CNRS - Centre National de la Recherche Scientifique : UPR3266 (France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/GANIL (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
2
IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
3
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan (Chemin du Solarium - BP 120 - 33175 Gradignan Cedex - France)
- Université Sciences et Technologies - Bordeaux 1 (351 cours de la Libération - 33405 Talence cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR5797 (France)
Abstract : Accurate mass measurements of neutron-rich iron and cobalt isotopes Fe67 and Co69,70 have been realized with the JYFLTRAP double Penning-trap mass spectrometer. With novel ion-manipulation techniques, the masses of the Co69,70 ground states and the 1/2− isomer in Co69 have been extracted for the first time. The measurements remove ambiguities in the previous mass values and yield a smoother trend on the mass surface, extending it beyond N=40. The moderate N=40 subshell gap has been found to weaken below Ni68, a region known for shape coexistence and increased collectivity. The excitation energy for the 1/2− intruder state in Co69 has been determined for the first time and is compared to large-scale shell-model calculations. The new mass values also reduce significantly mass-related uncertainties for the astrophysical rapid neutron-capture process calculations.
Keywords :
Nuclear Structure
Document type :
Journal articles
Domain :
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https://hal.archives-ouvertes.fr/hal-03012793
Contributor : Francois de Oliveira Santos <>
Submitted on : Friday, December 4, 2020 - 10:41:27 AM
Last modification on : Friday, December 11, 2020 - 4:31:37 PM
Contributor : Francois de Oliveira Santos <>
Submitted on : Friday, December 4, 2020 - 10:41:27 AM
Last modification on : Friday, December 11, 2020 - 4:31:37 PM
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N40_paper_13Jan2020.pdf
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Identifiers
- HAL Id : hal-03012793, version 1
- DOI : 10.1103/PhysRevC.101.041304
- INSPIRE : 1792219
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Citation
L. Canete, S. Giraud, A. Kankainen, B. Bastin, F. Nowacki, et al.. Precision mass measurements of $^{67}$Fe and $^{69,70}$Co : Nuclear structure toward N = 40 and impact on r -process reaction rates. Physical Review C, American Physical Society, 2020, 101 (4), pp.041304. ⟨10.1103/PhysRevC.101.041304⟩. ⟨hal-03012793⟩
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