Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in 129Sn

R. Lică; H. Mach; L. M. Fraile; A. Gargano; M. J. G. Borge; N. Mărginean; C. O. Sotty; V. Vedia; A. N. Andreyev; G. Benzoni; P. Bomans; R. Borcea; L. Coraggio; C. Costache; H. De Witte; F. Flavigny; H. Fynbo; L. P. Gaffney; P. T. Greenlees; L. J. Harkness-Brennan; M. Huyse; P. Ibáñez; D. S. Judson; J. Konki; A. Korgul; T. Kröll; J. Kurcewicz; S. Lalkovski; I. Lazarus; M. V. Lund; M. Madurga; R. Mărginean; I. Marroquín; C. Mihai; R. E. Mihai; A. I. Morales; E. Nácher; A. Negret; R. D. Page; J. Pakarinen; S. Pascu; V. Paziy; A. Perea; M. Pérez-liva; E. Picado; V. Pucknell; E. Rapisarda; P. Rahkila; F. Rotaru; J. A. Swartz; O. Tengblad; P. Van Duppen; M. Vidal; R. Wadsworth; W. B. Walters; N. Warr

doi:10.1103/PhysRevC.93.044303

Fast-timing study of the l-forbidden 1/2⁺→3/2⁺ M1 transition in ¹²⁹Sn

R. Lică, H. Mach, L. M. Fraile, A. Gargano, M. J. G. Borge, N. Mărginean, C. O. Sotty, V. Vedia, A. N. Andreyev, G. Benzoni, P. Bomans, R. Borcea, L. Coraggio, C. Costache, H. De Witte, F. Flavigny, H. Fynbo, L. P. Gaffney, P. T. Greenlees, L. J. Harkness-BrennanM. Huyse, P. Ibáñez, D. S. Judson, J. Konki, A. Korgul, T. Kröll, J. Kurcewicz, S. Lalkovski, I. Lazarus, M. V. Lund, M. Madurga, R. Mărginean, I. Marroquín, C. Mihai, R. E. Mihai, A. I. Morales, E. Nácher, A. Negret, R. D. Page, J. Pakarinen, S. Pascu, V. Paziy, A. Perea, M. Pérez-liva, E. Picado, V. Pucknell, E. Rapisarda, P. Rahkila, F. Rotaru, J. A. Swartz, O. Tengblad, P. Van Duppen, M. Vidal, R. Wadsworth, W. B. Walters, N. Warr

School of Computing, Engineering and Physical Sciences

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Abstract

The levels in Sn129 populated from the β− decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2+ state and the 3/2+ ground state in Sn129 are expected to have configurations dominated by the neutron s1/2 (l=0) and d3/2 ( l=2 ) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we have measured the half-life of the 1/2+ 315.3-keV state, T1/2= 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T1/2 value by the renormalization of the M1 effective operator for neutron holes.

Original language	English
Article number	044303
Number of pages	7
Journal	Physical Review C
Volume	93
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.93.044303
Publication status	Published - 4 Apr 2016

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Lică, R., Mach, H., Fraile, L. M., Gargano, A., Borge, M. J. G., Mărginean, N., Sotty, C. O., Vedia, V., Andreyev, A. N., Benzoni, G., Bomans, P., Borcea, R., Coraggio, L., Costache, C., De Witte, H., Flavigny, F., Fynbo, H., Gaffney, L. P., Greenlees, P. T., ... Warr, N. (2016). Fast-timing study of the l-forbidden 1/2⁺→3/2⁺ M1 transition in ¹²⁹Sn. Physical Review C, 93(4), Article 044303 . https://doi.org/10.1103/PhysRevC.93.044303

@article{2b4d5c3f979d4594919c71ed98f08352,

title = "Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in 129Sn",

abstract = "The levels in Sn129 populated from the β− decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2+ state and the 3/2+ ground state in Sn129 are expected to have configurations dominated by the neutron s1/2 (l=0) and d3/2 ( l=2 ) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we have measured the half-life of the 1/2+ 315.3-keV state, T1/2= 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T1/2 value by the renormalization of the M1 effective operator for neutron holes.",

author = "R. Lic{\u a} and H. Mach and Fraile, \{L. M.\} and A. Gargano and Borge, \{M. J. G.\} and N. M{\u a}rginean and Sotty, \{C. O.\} and V. Vedia and Andreyev, \{A. N.\} and G. Benzoni and P. Bomans and R. Borcea and L. Coraggio and C. Costache and \{De Witte\}, H. and F. Flavigny and H. Fynbo and Gaffney, \{L. P.\} and Greenlees, \{P. T.\} and Harkness-Brennan, \{L. J.\} and M. Huyse and P. Ib{\'a}{\~n}ez and Judson, \{D. S.\} and J. Konki and A. Korgul and T. Kr{\"o}ll and J. Kurcewicz and S. Lalkovski and I. Lazarus and Lund, \{M. V.\} and M. Madurga and R. M{\u a}rginean and I. Marroqu{\'i}n and C. Mihai and Mihai, \{R. E.\} and Morales, \{A. I.\} and E. N{\'a}cher and A. Negret and Page, \{R. D.\} and J. Pakarinen and S. Pascu and V. Paziy and A. Perea and M. P{\'e}rez-liva and E. Picado and V. Pucknell and E. Rapisarda and P. Rahkila and F. Rotaru and Swartz, \{J. A.\} and O. Tengblad and \{Van Duppen\}, P. and M. Vidal and R. Wadsworth and Walters, \{W. B.\} and N. Warr",

year = "2016",

month = apr,

day = "4",

doi = "10.1103/PhysRevC.93.044303",

language = "English",

volume = "93",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

}

Lică, R, Mach, H, Fraile, LM, Gargano, A, Borge, MJG, Mărginean, N, Sotty, CO, Vedia, V, Andreyev, AN, Benzoni, G, Bomans, P, Borcea, R, Coraggio, L, Costache, C, De Witte, H, Flavigny, F, Fynbo, H, Gaffney, LP, Greenlees, PT, Harkness-Brennan, LJ, Huyse, M, Ibáñez, P, Judson, DS, Konki, J, Korgul, A, Kröll, T, Kurcewicz, J, Lalkovski, S, Lazarus, I, Lund, MV, Madurga, M, Mărginean, R, Marroquín, I, Mihai, C, Mihai, RE, Morales, AI, Nácher, E, Negret, A, Page, RD, Pakarinen, J, Pascu, S, Paziy, V, Perea, A, Pérez-liva, M, Picado, E, Pucknell, V, Rapisarda, E, Rahkila, P, Rotaru, F, Swartz, JA, Tengblad, O, Van Duppen, P, Vidal, M, Wadsworth, R, Walters, WB & Warr, N 2016, 'Fast-timing study of the l-forbidden 1/2⁺→3/2⁺ M1 transition in ¹²⁹Sn', Physical Review C, vol. 93, no. 4, 044303 . https://doi.org/10.1103/PhysRevC.93.044303

TY - JOUR

T1 - Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in 129Sn

AU - Lică, R.

AU - Mach, H.

AU - Fraile, L. M.

AU - Gargano, A.

AU - Borge, M. J. G.

AU - Mărginean, N.

AU - Sotty, C. O.

AU - Vedia, V.

AU - Andreyev, A. N.

AU - Benzoni, G.

AU - Bomans, P.

AU - Borcea, R.

AU - Coraggio, L.

AU - Costache, C.

AU - De Witte, H.

AU - Flavigny, F.

AU - Fynbo, H.

AU - Gaffney, L. P.

AU - Greenlees, P. T.

AU - Harkness-Brennan, L. J.

AU - Huyse, M.

AU - Ibáñez, P.

AU - Judson, D. S.

AU - Konki, J.

AU - Korgul, A.

AU - Kröll, T.

AU - Kurcewicz, J.

AU - Lalkovski, S.

AU - Lazarus, I.

AU - Lund, M. V.

AU - Madurga, M.

AU - Mărginean, R.

AU - Marroquín, I.

AU - Mihai, C.

AU - Mihai, R. E.

AU - Morales, A. I.

AU - Nácher, E.

AU - Negret, A.

AU - Page, R. D.

AU - Pakarinen, J.

AU - Pascu, S.

AU - Paziy, V.

AU - Perea, A.

AU - Pérez-liva, M.

AU - Picado, E.

AU - Pucknell, V.

AU - Rapisarda, E.

AU - Rahkila, P.

AU - Rotaru, F.

AU - Swartz, J. A.

AU - Tengblad, O.

AU - Van Duppen, P.

AU - Vidal, M.

AU - Wadsworth, R.

AU - Walters, W. B.

AU - Warr, N.

PY - 2016/4/4

Y1 - 2016/4/4

N2 - The levels in Sn129 populated from the β− decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2+ state and the 3/2+ ground state in Sn129 are expected to have configurations dominated by the neutron s1/2 (l=0) and d3/2 ( l=2 ) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we have measured the half-life of the 1/2+ 315.3-keV state, T1/2= 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T1/2 value by the renormalization of the M1 effective operator for neutron holes.

AB - The levels in Sn129 populated from the β− decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2+ state and the 3/2+ ground state in Sn129 are expected to have configurations dominated by the neutron s1/2 (l=0) and d3/2 ( l=2 ) single-particle states, respectively. Consequently, these states should be connected by a somewhat slow l-forbidden M1 transition. Using fast-timing spectroscopy we have measured the half-life of the 1/2+ 315.3-keV state, T1/2= 19(10) ps, which corresponds to a moderately fast M1 transition. Shell-model calculations using the CD-Bonn effective interaction, with standard effective charges and g factors, predict a 4-ns half-life for this level. We can reconcile the shell-model calculations to the measured T1/2 value by the renormalization of the M1 effective operator for neutron holes.

U2 - 10.1103/PhysRevC.93.044303

DO - 10.1103/PhysRevC.93.044303

M3 - Article

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044303

ER -

Fast-timing study of the l-forbidden 1/2+→3/2+ M1 transition in 129Sn

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Fast-timing study of the l-forbidden 1/2⁺→3/2⁺ M1 transition in ¹²⁹Sn