Shell Erosion and Shape Coexistence in S-43(16)27

L. Gaudefroy; J. M. Daugas; M. Hass; S. Grevy; Ch. Stodel; J. C. Thomas; L. Perrot; M. Girod; B. Rosse; J. C. Angelique; D. L. Balabanski; E. Fiori; C. Force; G. Georgiev; D. Kameda; V. Kumar; R. L. Lozeva; I. Matea; V. Meot; P. Morel; B. S. Nara Singh; F. Nowacki; G. Simpson

doi:10.1103/PhysRevLett.102.092501

Shell Erosion and Shape Coexistence in S-43(16)27

L. Gaudefroy, J. M. Daugas, M. Hass, S. Grevy, Ch. Stodel, J. C. Thomas, L. Perrot, M. Girod, B. Rosse, J. C. Angelique, D. L. Balabanski, E. Fiori, C. Force, G. Georgiev, D. Kameda, V. Kumar, R. L. Lozeva, I. Matea, V. Meot, P. MorelB. S. Nara Singh, F. Nowacki, G. Simpson

Health Sciences

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Abstract

We report on the g-factor measurement of the first isomeric state in S-43(16)27 [E-x=320.5(5) keV, T-1/2=415(5) ns, and g=0.317(4)]. The 7/2(-) spin-parity of the isomer and the intruder nature of the ground state of the nucleus are experimentally established for the first time, providing direct and unambiguous evidence of the collapse of the N=28 shell closure in neutron-rich nuclei. The shell model, beyond the mean-field and semiempirical calculations, provides a very consistent description of this nucleus showing that a well deformed prolate and quasispherical states coexist at low energy.

Original language	English
Article number	092501
Pages (from-to)	-
Number of pages	4
Journal	Physical Review Letters
Volume	102
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.102.092501
Publication status	Published - 6 Mar 2009

Keywords

ANOMALOUS MAGNETIC-MOMENT
POSITIVE MUON
NUCLEI
STABILITY
CLOSURE

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10.1103/PhysRevLett.102.092501

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Gaudefroy, L., Daugas, J. M., Hass, M., Grevy, S., Stodel, C., Thomas, J. C., Perrot, L., Girod, M., Rosse, B., Angelique, J. C., Balabanski, D. L., Fiori, E., Force, C., Georgiev, G., Kameda, D., Kumar, V., Lozeva, R. L., Matea, I., Meot, V., ... Simpson, G. (2009). Shell Erosion and Shape Coexistence in S-43(16)27. Physical Review Letters, 102(9), -. Article 092501. https://doi.org/10.1103/PhysRevLett.102.092501

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title = "Shell Erosion and Shape Coexistence in S-43(16)27",

abstract = "We report on the g-factor measurement of the first isomeric state in S-43(16)27 [E-x=320.5(5) keV, T-1/2=415(5) ns, and g=0.317(4)]. The 7/2(-) spin-parity of the isomer and the intruder nature of the ground state of the nucleus are experimentally established for the first time, providing direct and unambiguous evidence of the collapse of the N=28 shell closure in neutron-rich nuclei. The shell model, beyond the mean-field and semiempirical calculations, provides a very consistent description of this nucleus showing that a well deformed prolate and quasispherical states coexist at low energy.",

keywords = "ANOMALOUS MAGNETIC-MOMENT, POSITIVE MUON, NUCLEI, STABILITY, CLOSURE",

author = "L. Gaudefroy and Daugas, {J. M.} and M. Hass and S. Grevy and Ch. Stodel and Thomas, {J. C.} and L. Perrot and M. Girod and B. Rosse and Angelique, {J. C.} and Balabanski, {D. L.} and E. Fiori and C. Force and G. Georgiev and D. Kameda and V. Kumar and Lozeva, {R. L.} and I. Matea and V. Meot and P. Morel and Singh, {B. S. Nara} and F. Nowacki and G. Simpson",

year = "2009",

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Gaudefroy, L, Daugas, JM, Hass, M, Grevy, S, Stodel, C, Thomas, JC, Perrot, L, Girod, M, Rosse, B, Angelique, JC, Balabanski, DL, Fiori, E, Force, C, Georgiev, G, Kameda, D, Kumar, V, Lozeva, RL, Matea, I, Meot, V, Morel, P, Singh, BSN, Nowacki, F & Simpson, G 2009, 'Shell Erosion and Shape Coexistence in S-43(16)27', Physical Review Letters, vol. 102, no. 9, 092501, pp. -. https://doi.org/10.1103/PhysRevLett.102.092501

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T1 - Shell Erosion and Shape Coexistence in S-43(16)27

AU - Gaudefroy, L.

AU - Daugas, J. M.

AU - Hass, M.

AU - Grevy, S.

AU - Stodel, Ch.

AU - Thomas, J. C.

AU - Perrot, L.

AU - Girod, M.

AU - Rosse, B.

AU - Angelique, J. C.

AU - Balabanski, D. L.

AU - Fiori, E.

AU - Force, C.

AU - Georgiev, G.

AU - Kameda, D.

AU - Kumar, V.

AU - Lozeva, R. L.

AU - Matea, I.

AU - Meot, V.

AU - Morel, P.

AU - Singh, B. S. Nara

AU - Nowacki, F.

AU - Simpson, G.

PY - 2009/3/6

Y1 - 2009/3/6

N2 - We report on the g-factor measurement of the first isomeric state in S-43(16)27 [E-x=320.5(5) keV, T-1/2=415(5) ns, and g=0.317(4)]. The 7/2(-) spin-parity of the isomer and the intruder nature of the ground state of the nucleus are experimentally established for the first time, providing direct and unambiguous evidence of the collapse of the N=28 shell closure in neutron-rich nuclei. The shell model, beyond the mean-field and semiempirical calculations, provides a very consistent description of this nucleus showing that a well deformed prolate and quasispherical states coexist at low energy.

AB - We report on the g-factor measurement of the first isomeric state in S-43(16)27 [E-x=320.5(5) keV, T-1/2=415(5) ns, and g=0.317(4)]. The 7/2(-) spin-parity of the isomer and the intruder nature of the ground state of the nucleus are experimentally established for the first time, providing direct and unambiguous evidence of the collapse of the N=28 shell closure in neutron-rich nuclei. The shell model, beyond the mean-field and semiempirical calculations, provides a very consistent description of this nucleus showing that a well deformed prolate and quasispherical states coexist at low energy.

KW - ANOMALOUS MAGNETIC-MOMENT

KW - POSITIVE MUON

KW - NUCLEI

KW - STABILITY

KW - CLOSURE

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DO - 10.1103/PhysRevLett.102.092501

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SP - -

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 092501

ER -

Shell Erosion and Shape Coexistence in S-43(16)27

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Keywords

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