Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements

A. Jungclaus; J. Walker; J. Leske; K. -H. Speidel; A. E. Stuchbery; M. East; P. Boutachkov; Joakim Cederkäll; P. Doornenbal; J. L. Egido; Andreas Ekström; J. Gerl; R. Gernhaeuser; N. Goel; M. Gorska; I. Kojouharov; P. Maier-Komor; V. Modamio; F. Naqvi; N. Pietralla; S. Pietri; W. Prokopowicz; H. Schaffner; R. Schwengner; H. -J. Wollersheim

doi:10.1016/j.physletb.2010.11.012

Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements

A. Jungclaus, J. Walker, J. Leske, K. -H. Speidel, A. E. Stuchbery, M. East, P. Boutachkov, Joakim Cederkäll, P. Doornenbal, J. L. Egido, Andreas Ekström, J. Gerl, R. Gernhaeuser, N. Goel, M. Gorska, I. Kojouharov, P. Maier-Komor, V. Modamio, F. Naqvi, N. PietrallaS. Pietri, W. Prokopowicz, H. Schaffner, R. Schwengner, H. -J. Wollersheim

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

Abstract

Precise measurements of the lifetimes of the first excited 2(+) states in the stable even-A Sn isotopes Sn112-124 have been performed using the Doppler shift attenuation technique. For the isotopes Sn-112, Sn-114 and Sn-116 the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N = 66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the S-1/2 neutron orbital in generating collectivity when near the Fermi level. (C) 2010 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	110-114
Journal	Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	695
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physletb.2010.11.012
Publication status	Published - 2011

Subject classification (UKÄ)

Subatomic Physics

Free keywords

Lifetimes
Sn isotopes
Doppler shift attenuation technique

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10.1016/j.physletb.2010.11.012

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Jungclaus, A., Walker, J., Leske, J., Speidel, K. .-H., Stuchbery, A. E., East, M., Boutachkov, P., Cederkäll, J., Doornenbal, P., Egido, J. L., Ekström, A., Gerl, J., Gernhaeuser, R., Goel, N., Gorska, M., Kojouharov, I., Maier-Komor, P., Modamio, V., Naqvi, F., ... Wollersheim, H. .-J. (2011). Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 695(1-4), 110-114. https://doi.org/10.1016/j.physletb.2010.11.012

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title = "Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements",

abstract = "Precise measurements of the lifetimes of the first excited 2(+) states in the stable even-A Sn isotopes Sn112-124 have been performed using the Doppler shift attenuation technique. For the isotopes Sn-112, Sn-114 and Sn-116 the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N = 66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the S-1/2 neutron orbital in generating collectivity when near the Fermi level. (C) 2010 Elsevier B.V. All rights reserved.",

keywords = "Lifetimes, Sn isotopes, Doppler shift attenuation technique",

author = "A. Jungclaus and J. Walker and J. Leske and Speidel, {K. -H.} and Stuchbery, {A. E.} and M. East and P. Boutachkov and Joakim Cederk{\"a}ll and P. Doornenbal and Egido, {J. L.} and Andreas Ekstr{\"o}m and J. Gerl and R. Gernhaeuser and N. Goel and M. Gorska and I. Kojouharov and P. Maier-Komor and V. Modamio and F. Naqvi and N. Pietralla and S. Pietri and W. Prokopowicz and H. Schaffner and R. Schwengner and Wollersheim, {H. -J.}",

year = "2011",

doi = "10.1016/j.physletb.2010.11.012",

language = "English",

volume = "695",

pages = "110--114",

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

issn = "0370-2693",

publisher = "Elsevier",

number = "1-4",

}

Jungclaus, A, Walker, J, Leske, J, Speidel, K-H, Stuchbery, AE, East, M, Boutachkov, P, Cederkäll, J, Doornenbal, P, Egido, JL, Ekström, A, Gerl, J, Gernhaeuser, R, Goel, N, Gorska, M, Kojouharov, I, Maier-Komor, P, Modamio, V, Naqvi, F, Pietralla, N, Pietri, S, Prokopowicz, W, Schaffner, H, Schwengner, R & Wollersheim, H-J 2011, 'Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements', Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 695, no. 1-4, pp. 110-114. https://doi.org/10.1016/j.physletb.2010.11.012

TY - JOUR

T1 - Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements

AU - Jungclaus, A.

AU - Walker, J.

AU - Leske, J.

AU - Speidel, K. -H.

AU - Stuchbery, A. E.

AU - East, M.

AU - Boutachkov, P.

AU - Cederkäll, Joakim

AU - Doornenbal, P.

AU - Egido, J. L.

AU - Ekström, Andreas

AU - Gerl, J.

AU - Gernhaeuser, R.

AU - Goel, N.

AU - Gorska, M.

AU - Kojouharov, I.

AU - Maier-Komor, P.

AU - Modamio, V.

AU - Naqvi, F.

AU - Pietralla, N.

AU - Pietri, S.

AU - Prokopowicz, W.

AU - Schaffner, H.

AU - Schwengner, R.

AU - Wollersheim, H. -J.

PY - 2011

Y1 - 2011

N2 - Precise measurements of the lifetimes of the first excited 2(+) states in the stable even-A Sn isotopes Sn112-124 have been performed using the Doppler shift attenuation technique. For the isotopes Sn-112, Sn-114 and Sn-116 the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N = 66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the S-1/2 neutron orbital in generating collectivity when near the Fermi level. (C) 2010 Elsevier B.V. All rights reserved.

AB - Precise measurements of the lifetimes of the first excited 2(+) states in the stable even-A Sn isotopes Sn112-124 have been performed using the Doppler shift attenuation technique. For the isotopes Sn-112, Sn-114 and Sn-116 the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N = 66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the S-1/2 neutron orbital in generating collectivity when near the Fermi level. (C) 2010 Elsevier B.V. All rights reserved.

KW - Lifetimes

KW - Sn isotopes

KW - Doppler shift attenuation technique

U2 - 10.1016/j.physletb.2010.11.012

DO - 10.1016/j.physletb.2010.11.012

M3 - Article

SN - 0370-2693

VL - 695

SP - 110

EP - 114

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 - 1-4

ER -

Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements

Abstract

Subject classification (UKÄ)

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