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-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

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

8 Citations (Scopus)

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