First g-factor measurements on semi-magic 36S and their implications for the rigidity of the N = 20 shell closure

K. H. Speidel; S. Schielke; J. Leske; N. Pietralla; T. Ahn; A. Costin; M. v. Schmid; O. Zell; J. Gerber; P. Maier-Komor; S. J.Q. Robinson; A. Escuderos; Y. Y. Sharon; L. Zamick

doi:10.1016/j.physletb.2007.11.049

First g-factor measurements on semi-magic ³⁶S and their implications for the rigidity of the N = 20 shell closure

K. H. Speidel, S. Schielke, J. Leske, N. Pietralla, T. Ahn, A. Costin, M. v. Schmid, O. Zell, J. Gerber, P. Maier-Komor, S. J.Q. Robinson, A. Escuderos, Y. Y. Sharon, L. Zamick

School of Arts and Sciences, Physics & Astronomy

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

9 Scopus citations

Abstract

The g-factor of the very short-lived (τ = 0.12 (1) ps) 2₁⁺ state at 3.290 MeV in ³⁶S, g (2₁⁺) = + 1.3 (5), has been determined for the first time by utilizing the Coulomb excitation of ³⁶S beams in inverse kinematics combined with the transient field technique. In addition, for the 3₁^- state (with τ = 0.9 (1) ps) at 4.192 MeV, a value of g (3₁^-) = + 0.8 (5) was obtained. In the same experiment, the g-factor of the 2₁⁺ state in ⁴⁰Ar has been remeasured using the α-transfer reaction on the same carbon target. Lifetimes of several excited states in both ³⁶S and ⁴⁰Ar were also redetermined using the Doppler-shift-attenuation method. The new experimental g-factors and deduced B (E 2) values were compared with results of shell-model calculations with the WBT effective interaction and the s d f p shell model space. Comparisons with previous results for ^32,34,38,40S and ^36,38,40Ar shed light on how the properties of the Ar and S isotopes change as the N = 20 shell closure is approached, crossed, and left behind.

Original language	English (US)
Pages (from-to)	101-106
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	659
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2007.11.049
State	Published - Jan 17 2008

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Keywords

Ar
Coulomb excitation
DSAM
Inverse kinematics
Lifetime
S
Transient magnetic field
g-factor
α-transfer

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10.1016/j.physletb.2007.11.049

Cite this

Speidel, K. H., Schielke, S., Leske, J., Pietralla, N., Ahn, T., Costin, A., Schmid, M. V., Zell, O., Gerber, J., Maier-Komor, P., Robinson, S. J. Q., Escuderos, A., Sharon, Y. Y., & Zamick, L. (2008). First g-factor measurements on semi-magic ³⁶S and their implications for the rigidity of the N = 20 shell closure. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 659(1-2), 101-106. https://doi.org/10.1016/j.physletb.2007.11.049

@article{3accd72dff34435d9e2ad4bb22c3871a,

title = "First g-factor measurements on semi-magic 36S and their implications for the rigidity of the N = 20 shell closure",

abstract = "The g-factor of the very short-lived (τ = 0.12 (1) ps) 21+ state at 3.290 MeV in 36S, g (21+) = + 1.3 (5), has been determined for the first time by utilizing the Coulomb excitation of 36S beams in inverse kinematics combined with the transient field technique. In addition, for the 31- state (with τ = 0.9 (1) ps) at 4.192 MeV, a value of g (31-) = + 0.8 (5) was obtained. In the same experiment, the g-factor of the 21+ state in 40Ar has been remeasured using the α-transfer reaction on the same carbon target. Lifetimes of several excited states in both 36S and 40Ar were also redetermined using the Doppler-shift-attenuation method. The new experimental g-factors and deduced B (E 2) values were compared with results of shell-model calculations with the WBT effective interaction and the s d f p shell model space. Comparisons with previous results for 32,34,38,40S and 36,38,40Ar shed light on how the properties of the Ar and S isotopes change as the N = 20 shell closure is approached, crossed, and left behind.",

keywords = "Ar, Coulomb excitation, DSAM, Inverse kinematics, Lifetime, S, Transient magnetic field, g-factor, α-transfer",

author = "Speidel, {K. H.} and S. Schielke and J. Leske and N. Pietralla and T. Ahn and A. Costin and Schmid, {M. v.} and O. Zell and J. Gerber and P. Maier-Komor and Robinson, {S. J.Q.} and A. Escuderos and Sharon, {Y. Y.} and L. Zamick",

note = "Funding Information: The authors are grateful to the operators of the accelerator. They acknowledge support by the BMBF, the Deutsche Forschungsgemeinschaft, the US DOE, the University of Southern Indiana, and the Richard Stockton College of New Jersey.",

year = "2008",

month = jan,

day = "17",

doi = "10.1016/j.physletb.2007.11.049",

language = "English (US)",

volume = "659",

pages = "101--106",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

Speidel, KH, Schielke, S, Leske, J, Pietralla, N, Ahn, T, Costin, A, Schmid, MV, Zell, O, Gerber, J, Maier-Komor, P, Robinson, SJQ, Escuderos, A, Sharon, YY & Zamick, L 2008, 'First g-factor measurements on semi-magic ³⁶S and their implications for the rigidity of the N = 20 shell closure', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 659, no. 1-2, pp. 101-106. https://doi.org/10.1016/j.physletb.2007.11.049

TY - JOUR

T1 - First g-factor measurements on semi-magic 36S and their implications for the rigidity of the N = 20 shell closure

AU - Speidel, K. H.

AU - Schielke, S.

AU - Leske, J.

AU - Pietralla, N.

AU - Ahn, T.

AU - Costin, A.

AU - Schmid, M. v.

AU - Zell, O.

AU - Gerber, J.

AU - Maier-Komor, P.

AU - Robinson, S. J.Q.

AU - Escuderos, A.

AU - Sharon, Y. Y.

AU - Zamick, L.

N1 - Funding Information: The authors are grateful to the operators of the accelerator. They acknowledge support by the BMBF, the Deutsche Forschungsgemeinschaft, the US DOE, the University of Southern Indiana, and the Richard Stockton College of New Jersey.

PY - 2008/1/17

Y1 - 2008/1/17

N2 - The g-factor of the very short-lived (τ = 0.12 (1) ps) 21+ state at 3.290 MeV in 36S, g (21+) = + 1.3 (5), has been determined for the first time by utilizing the Coulomb excitation of 36S beams in inverse kinematics combined with the transient field technique. In addition, for the 31- state (with τ = 0.9 (1) ps) at 4.192 MeV, a value of g (31-) = + 0.8 (5) was obtained. In the same experiment, the g-factor of the 21+ state in 40Ar has been remeasured using the α-transfer reaction on the same carbon target. Lifetimes of several excited states in both 36S and 40Ar were also redetermined using the Doppler-shift-attenuation method. The new experimental g-factors and deduced B (E 2) values were compared with results of shell-model calculations with the WBT effective interaction and the s d f p shell model space. Comparisons with previous results for 32,34,38,40S and 36,38,40Ar shed light on how the properties of the Ar and S isotopes change as the N = 20 shell closure is approached, crossed, and left behind.

AB - The g-factor of the very short-lived (τ = 0.12 (1) ps) 21+ state at 3.290 MeV in 36S, g (21+) = + 1.3 (5), has been determined for the first time by utilizing the Coulomb excitation of 36S beams in inverse kinematics combined with the transient field technique. In addition, for the 31- state (with τ = 0.9 (1) ps) at 4.192 MeV, a value of g (31-) = + 0.8 (5) was obtained. In the same experiment, the g-factor of the 21+ state in 40Ar has been remeasured using the α-transfer reaction on the same carbon target. Lifetimes of several excited states in both 36S and 40Ar were also redetermined using the Doppler-shift-attenuation method. The new experimental g-factors and deduced B (E 2) values were compared with results of shell-model calculations with the WBT effective interaction and the s d f p shell model space. Comparisons with previous results for 32,34,38,40S and 36,38,40Ar shed light on how the properties of the Ar and S isotopes change as the N = 20 shell closure is approached, crossed, and left behind.

KW - Ar

KW - Coulomb excitation

KW - DSAM

KW - Inverse kinematics

KW - Lifetime

KW - S

KW - Transient magnetic field

KW - g-factor

KW - α-transfer

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U2 - 10.1016/j.physletb.2007.11.049

DO - 10.1016/j.physletb.2007.11.049

M3 - Article

AN - SCOPUS:37449005733

SN - 0370-2693

VL - 659

SP - 101

EP - 106

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -