Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics

L. Gaudefroy; O. Sorlin; D. Beaumel; Y. Blumenfeld; Z. Dombradi; S. Fortier; S. Franchoo; M. Gelin; J. Gibelin; S. Grevy; F. Hammache; F. Ibrahim; K. Kemper; K.L. Kratz; S. M. Lukyanov; C. Monrozeau; L. Nalpas; F. Nowacki; A. N. Ostrowski; Yu. -E. Penionzhkevich; E. Pollacco; P. Roussel-Chomaz; E. Rich; J. A. Scarpaci; M. G. St. Laurent; T. Rauscher; D. Sohler; M. Stanoiu; E. Tryggestad; D. Verney

doi:10.1140/epja/i2006-08-047-0

Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics

L. Gaudefroy, O. Sorlin, D. Beaumel, Y. Blumenfeld, Z. Dombradi, S. Fortier, S. Franchoo, M. Gelin, J. Gibelin, S. Grevy, F. Hammache, F. Ibrahim, K. Kemper, K.L. Kratz, S. M. Lukyanov, C. Monrozeau, L. Nalpas, F. Nowacki, A. N. Ostrowski, Yu. -E. PenionzhkevichE. Pollacco, P. Roussel-Chomaz, E. Rich, J. A. Scarpaci, M. G. St. Laurent, T. Rauscher, D. Sohler, M. Stanoiu, E. Tryggestad, D. Verney

Centre for Astrophysics Research (CAR)

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The structure of the neutron-rich nucleus (47)Ar has been investigated through the d((46)Ar,(47)Ar)p transfer reaction. The radioactive beam of (46)Ar at 10 A . MeV was provided by the SPIRAL facility at GANIL. The protons corresponding to a neutron pick-up on bound or unbound states mechanism in (47)Ar nuclei were detected at backward angles by the position-sensitive Si array-detector MUST. The transfer-like ejectiles were detected in the SPEG spectrometer. Level scheme, spin assignments and spectroscopic factors have been deduced for (47)Ar and compared to shell model predictions. They suggest a slight erosion of the N = 28 shell gap from the weakening of the spin-orbit interaction arising from the f and p orbitals. These spectroscopic information are subsequently used to infer (n, gamma) reaction rates in the Ar isotopic chain to understand the origin of the (48)Ca/(46)Ca abnormal isotopic ratio observed in certain inclusions of meteorites.

Original language	English
Pages (from-to)	309-314
Number of pages	6
Journal	European Physical Journal A: Hadrons and Nuclei
Volume	27
Issue number	supp 1
DOIs	https://doi.org/10.1140/epja/i2006-08-047-0
Publication status	Published - Mar 2006

Access to Document

10.1140/epja/i2006-08-047-0

Cite this

Gaudefroy, L., Sorlin, O., Beaumel, D., Blumenfeld, Y., Dombradi, Z., Fortier, S., Franchoo, S., Gelin, M., Gibelin, J., Grevy, S., Hammache, F., Ibrahim, F., Kemper, K., Kratz, K. L., Lukyanov, S. M., Monrozeau, C., Nalpas, L., Nowacki, F., Ostrowski, A. N., ... Verney, D. (2006). Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics. European Physical Journal A: Hadrons and Nuclei, 27(supp 1), 309-314. https://doi.org/10.1140/epja/i2006-08-047-0

@article{d114e8c902724e3a8216f81f989dc580,

title = "Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics",

abstract = "The structure of the neutron-rich nucleus (47)Ar has been investigated through the d((46)Ar,(47)Ar)p transfer reaction. The radioactive beam of (46)Ar at 10 A . MeV was provided by the SPIRAL facility at GANIL. The protons corresponding to a neutron pick-up on bound or unbound states mechanism in (47)Ar nuclei were detected at backward angles by the position-sensitive Si array-detector MUST. The transfer-like ejectiles were detected in the SPEG spectrometer. Level scheme, spin assignments and spectroscopic factors have been deduced for (47)Ar and compared to shell model predictions. They suggest a slight erosion of the N = 28 shell gap from the weakening of the spin-orbit interaction arising from the f and p orbitals. These spectroscopic information are subsequently used to infer (n, gamma) reaction rates in the Ar isotopic chain to understand the origin of the (48)Ca/(46)Ca abnormal isotopic ratio observed in certain inclusions of meteorites.",

author = "L. Gaudefroy and O. Sorlin and D. Beaumel and Y. Blumenfeld and Z. Dombradi and S. Fortier and S. Franchoo and M. Gelin and J. Gibelin and S. Grevy and F. Hammache and F. Ibrahim and K. Kemper and K.L. Kratz and Lukyanov, {S. M.} and C. Monrozeau and L. Nalpas and F. Nowacki and Ostrowski, {A. N.} and Penionzhkevich, {Yu. -E.} and E. Pollacco and P. Roussel-Chomaz and E. Rich and Scarpaci, {J. A.} and Laurent, {M. G. St.} and T. Rauscher and D. Sohler and M. Stanoiu and E. Tryggestad and D. Verney",

year = "2006",

month = mar,

doi = "10.1140/epja/i2006-08-047-0",

language = "English",

volume = "27",

pages = "309--314",

journal = "European Physical Journal A: Hadrons and Nuclei",

issn = "1434-6001",

publisher = "Springer Nature",

number = "supp 1",

}

Gaudefroy, L, Sorlin, O, Beaumel, D, Blumenfeld, Y, Dombradi, Z, Fortier, S, Franchoo, S, Gelin, M, Gibelin, J, Grevy, S, Hammache, F, Ibrahim, F, Kemper, K, Kratz, KL, Lukyanov, SM, Monrozeau, C, Nalpas, L, Nowacki, F, Ostrowski, AN, Penionzhkevich, Y-E, Pollacco, E, Roussel-Chomaz, P, Rich, E, Scarpaci, JA, Laurent, MGS, Rauscher, T, Sohler, D, Stanoiu, M, Tryggestad, E & Verney, D 2006, 'Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics', European Physical Journal A: Hadrons and Nuclei, vol. 27, no. supp 1, pp. 309-314. https://doi.org/10.1140/epja/i2006-08-047-0

TY - JOUR

T1 - Study of the N=28 shell closure in the Ar isotopic chain

T2 - a SPIRAL experiment for nuclear astrophysics

AU - Gaudefroy, L.

AU - Sorlin, O.

AU - Beaumel, D.

AU - Blumenfeld, Y.

AU - Dombradi, Z.

AU - Fortier, S.

AU - Franchoo, S.

AU - Gelin, M.

AU - Gibelin, J.

AU - Grevy, S.

AU - Hammache, F.

AU - Ibrahim, F.

AU - Kemper, K.

AU - Kratz, K.L.

AU - Lukyanov, S. M.

AU - Monrozeau, C.

AU - Nalpas, L.

AU - Nowacki, F.

AU - Ostrowski, A. N.

AU - Penionzhkevich, Yu. -E.

AU - Pollacco, E.

AU - Roussel-Chomaz, P.

AU - Rich, E.

AU - Scarpaci, J. A.

AU - Laurent, M. G. St.

AU - Rauscher, T.

AU - Sohler, D.

AU - Stanoiu, M.

AU - Tryggestad, E.

AU - Verney, D.

PY - 2006/3

Y1 - 2006/3

N2 - The structure of the neutron-rich nucleus (47)Ar has been investigated through the d((46)Ar,(47)Ar)p transfer reaction. The radioactive beam of (46)Ar at 10 A . MeV was provided by the SPIRAL facility at GANIL. The protons corresponding to a neutron pick-up on bound or unbound states mechanism in (47)Ar nuclei were detected at backward angles by the position-sensitive Si array-detector MUST. The transfer-like ejectiles were detected in the SPEG spectrometer. Level scheme, spin assignments and spectroscopic factors have been deduced for (47)Ar and compared to shell model predictions. They suggest a slight erosion of the N = 28 shell gap from the weakening of the spin-orbit interaction arising from the f and p orbitals. These spectroscopic information are subsequently used to infer (n, gamma) reaction rates in the Ar isotopic chain to understand the origin of the (48)Ca/(46)Ca abnormal isotopic ratio observed in certain inclusions of meteorites.

AB - The structure of the neutron-rich nucleus (47)Ar has been investigated through the d((46)Ar,(47)Ar)p transfer reaction. The radioactive beam of (46)Ar at 10 A . MeV was provided by the SPIRAL facility at GANIL. The protons corresponding to a neutron pick-up on bound or unbound states mechanism in (47)Ar nuclei were detected at backward angles by the position-sensitive Si array-detector MUST. The transfer-like ejectiles were detected in the SPEG spectrometer. Level scheme, spin assignments and spectroscopic factors have been deduced for (47)Ar and compared to shell model predictions. They suggest a slight erosion of the N = 28 shell gap from the weakening of the spin-orbit interaction arising from the f and p orbitals. These spectroscopic information are subsequently used to infer (n, gamma) reaction rates in the Ar isotopic chain to understand the origin of the (48)Ca/(46)Ca abnormal isotopic ratio observed in certain inclusions of meteorites.

U2 - 10.1140/epja/i2006-08-047-0

DO - 10.1140/epja/i2006-08-047-0

M3 - Article

SN - 1434-6001

VL - 27

SP - 309

EP - 314

JO - European Physical Journal A: Hadrons and Nuclei

JF - European Physical Journal A: Hadrons and Nuclei

IS - supp 1

ER -

Study of the N=28 shell closure in the Ar isotopic chain: a SPIRAL experiment for nuclear astrophysics

Abstract

Access to Document

Fingerprint

Cite this