g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments

G. Neyens; G. Georgiev; R. Grzywacz; M. Hass; F. Oliveira Santos; M. Lewitowicz; D. L. Balabanski; C. Bingham; C. Borcea; N. Coulier; R. Coussement; J. M. Daugas; G. Defrance; G. Goldring; M. Górska; H. Grawe; C. O'Leary; I. Macovei; H. Mach; R. Page; M. Pfützner; Yu E. Penionzkevich; Z. Podolyak; P. H. Regan; K. Rykaczewski; M. Sawicka; N. A. Smirnova; Yu Sobolev; S. Teughels; K. Vyvey

doi:10.1016/S0375-9474(01)01618-9

g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments

G. Neyens, G. Georgiev, R. Grzywacz, M. Hass, F. Oliveira Santos, M. Lewitowicz, D. L. Balabanski, C. Bingham, C. Borcea, N. Coulier, R. Coussement, J. M. Daugas, G. Defrance, G. Goldring, M. Górska, H. Grawe, C. O'Leary, I. Macovei, H. Mach, R. PageM. Pfützner, Yu E. Penionzkevich, Z. Podolyak, P. H. Regan, K. Rykaczewski, M. Sawicka, N. A. Smirnova, Yu Sobolev, S. Teughels, K. Vyvey

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Abstract

First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of ⁶⁸Ni are reported. Isomers near the predicted N = 40 sub-shell closure in ⁶⁹Cu, ⁶⁷Ni and ⁶⁶Co have been populated in the fragmentation of a ⁷⁶Ge, 61.4 MeV/u beam onto a 145 mg/cm² ⁹Be target at GANIL. Here we report the results for the 357(2) ns, 1^π = 13/2⁺ isomer in ⁶⁹Cu for which a preliminary gyromagnetic ratio of g = 0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording γ-ion correlations in a 20 μs time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind.

Original language	English
Pages (from-to)	403-409
Number of pages	7
Journal	Nuclear Physics A
Volume	701
Issue number	1-4
DOIs	https://doi.org/10.1016/S0375-9474(01)01618-9
State	Published - Apr 22 2002

Funding

✩ This work has been supported by the Access to Large Scale Facility program under the Training and Mobility of Researchers program of the European Union, under contract nr. ERBFMGECT950036. * Corresponding author. E-mail address: [email protected] (G. Neyens). We are grateful to the CEA (France), EPSRC (UK) and NBI (Denmark) for providing Clover detectors. G.N. acknowledges the FWO-Vlaanderen, Belgium, for a post-doc fellowship and is grateful for the hospitality received at the GANIL facility during the year preceding the experiment. Partial financial support under DOE contract DE-FG02-96ER40983 and by Polish Committee of Scientific Research under grant KBN 2 P03B 036 15 and from EPSRC (UK) is also acknowledged. M.H. and G.G. acknowledge partial support of Weizmann team from the Israel Science Foundation (ISF).

Keywords

Exotic nuclei
g-factors
Nuclear structure
Projectile fragmentation reactions
TDPAD

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Neyens, G., Georgiev, G., Grzywacz, R., Hass, M., Oliveira Santos, F., Lewitowicz, M., Balabanski, D. L., Bingham, C., Borcea, C., Coulier, N., Coussement, R., Daugas, J. M., Defrance, G., Goldring, G., Górska, M., Grawe, H., O'Leary, C., Macovei, I., Mach, H., ... Vyvey, K. (2002). g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments. Nuclear Physics A, 701(1-4), 403-409. https://doi.org/10.1016/S0375-9474(01)01618-9

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title = "g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments",

abstract = "First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of 68Ni are reported. Isomers near the predicted N = 40 sub-shell closure in 69Cu, 67Ni and 66Co have been populated in the fragmentation of a 76Ge, 61.4 MeV/u beam onto a 145 mg/cm2 9Be target at GANIL. Here we report the results for the 357(2) ns, 1π = 13/2+ isomer in 69Cu for which a preliminary gyromagnetic ratio of g = 0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording γ-ion correlations in a 20 μs time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind.",

keywords = "Exotic nuclei, g-factors, Nuclear structure, Projectile fragmentation reactions, TDPAD",

author = "G. Neyens and G. Georgiev and R. Grzywacz and M. Hass and {Oliveira Santos}, F. and M. Lewitowicz and Balabanski, {D. L.} and C. Bingham and C. Borcea and N. Coulier and R. Coussement and Daugas, {J. M.} and G. Defrance and G. Goldring and M. G{\'o}rska and H. Grawe and C. O'Leary and I. Macovei and H. Mach and R. Page and M. Pf{\"u}tzner and Penionzkevich, {Yu E.} and Z. Podolyak and Regan, {P. H.} and K. Rykaczewski and M. Sawicka and Smirnova, {N. A.} and Yu Sobolev and S. Teughels and K. Vyvey",

year = "2002",

month = apr,

day = "22",

doi = "10.1016/S0375-9474(01)01618-9",

language = "English",

volume = "701",

pages = "403--409",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

number = "1-4",

}

Neyens, G, Georgiev, G, Grzywacz, R, Hass, M, Oliveira Santos, F, Lewitowicz, M, Balabanski, DL, Bingham, C, Borcea, C, Coulier, N, Coussement, R, Daugas, JM, Defrance, G, Goldring, G, Górska, M, Grawe, H, O'Leary, C, Macovei, I, Mach, H, Page, R, Pfützner, M, Penionzkevich, YE, Podolyak, Z, Regan, PH, Rykaczewski, K, Sawicka, M, Smirnova, NA, Sobolev, Y, Teughels, S & Vyvey, K 2002, 'g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments', Nuclear Physics A, vol. 701, no. 1-4, pp. 403-409. https://doi.org/10.1016/S0375-9474(01)01618-9

TY - JOUR

T1 - g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments

AU - Neyens, G.

AU - Georgiev, G.

AU - Grzywacz, R.

AU - Hass, M.

AU - Oliveira Santos, F.

AU - Lewitowicz, M.

AU - Balabanski, D. L.

AU - Bingham, C.

AU - Borcea, C.

AU - Coulier, N.

AU - Coussement, R.

AU - Daugas, J. M.

AU - Defrance, G.

AU - Goldring, G.

AU - Górska, M.

AU - Grawe, H.

AU - O'Leary, C.

AU - Macovei, I.

AU - Mach, H.

AU - Page, R.

AU - Pfützner, M.

AU - Penionzkevich, Yu E.

AU - Podolyak, Z.

AU - Regan, P. H.

AU - Rykaczewski, K.

AU - Sawicka, M.

AU - Smirnova, N. A.

AU - Sobolev, Yu

AU - Teughels, S.

AU - Vyvey, K.

PY - 2002/4/22

Y1 - 2002/4/22

N2 - First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of 68Ni are reported. Isomers near the predicted N = 40 sub-shell closure in 69Cu, 67Ni and 66Co have been populated in the fragmentation of a 76Ge, 61.4 MeV/u beam onto a 145 mg/cm2 9Be target at GANIL. Here we report the results for the 357(2) ns, 1π = 13/2+ isomer in 69Cu for which a preliminary gyromagnetic ratio of g = 0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording γ-ion correlations in a 20 μs time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind.

AB - First and preliminary results of an experiment aimed at measuring g-factors of isomeric states in neutron-rich nuclei in the vicinity of 68Ni are reported. Isomers near the predicted N = 40 sub-shell closure in 69Cu, 67Ni and 66Co have been populated in the fragmentation of a 76Ge, 61.4 MeV/u beam onto a 145 mg/cm2 9Be target at GANIL. Here we report the results for the 357(2) ns, 1π = 13/2+ isomer in 69Cu for which a preliminary gyromagnetic ratio of g = 0.195(9) was derived. The Larmor precession of the spin-oriented isomeric ensemble was measured by recording γ-ion correlations in a 20 μs time window. This pioneering experiment has indicated interesting nuclear structure information and shows promising possibilities for future studies of this kind.

KW - Exotic nuclei

KW - g-factors

KW - Nuclear structure

KW - Projectile fragmentation reactions

KW - TDPAD

UR - http://www.scopus.com/inward/record.url?scp=0037156629&partnerID=8YFLogxK

U2 - 10.1016/S0375-9474(01)01618-9

DO - 10.1016/S0375-9474(01)01618-9

M3 - Article

AN - SCOPUS:0037156629

SN - 0375-9474

VL - 701

SP - 403

EP - 409

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-4

ER -

g-factors of isomers around N ≈ 40, Z ≈ 28 from time-dependent Larmor precession on spin-aligned projectile-like fragments

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