Isospin dependence of electromagnetic transition strengths among an isobaric triplet

A. Boso; S.A. Milne; M.A. Bentley; F. Recchia; S.M. Lenzi; D. Rudolph; M. Labiche; X. Pereira-Lopez; S. Afara; F. Ameil; T. Arici; S. Aydin; M. Axiotis; D. Barrientos; G. Benzoni; B. Birkenbach; A.J. Boston; H.C. Boston; P. Boutachkov; A. Bracco; A.M. Bruce; B. Bruyneel; B. Cederwall; E. Clement; M.L. Cortes; D.M. Cullen; P. Désesquelles; Zs. Dombràdi; C. Domingo-Pardo; J. Eberth; C. Fahlander; M. Gelain; V. González; P.R. John; J. Gerl; P. Golubev; M. Górska; A. Gottardo; T. Grahn; L. Grassi; T. Habermann; L.J. Harkness-Brennan; T.W. Henry; H. Hess; I. Kojouharov; W. Korten; N. Lalović; M. Lettmann; C. Lizarazo; C. Louchart-Henning; R. Menegazzo; D. Mengoni; E. Merchan; C. Michelagnoli; B. Million; V. Modamio; T. Moeller; D.R. Napoli; J. Nyberg; B.S. Nara Singh; H. Pai; N. Pietralla; S. Pietri; Zs. Podolyak; R.M. Perez Vidal; A. Pullia; D. Ralet; G. Rainovski; M. Reese; P. Reiter; M.D. Salsac; E. Sanchis; L.G. Sarmiento; H. Schaffner; L.M. Scruton; P.P. Singh; C. Stahl; S. Uthayakumaar; J.J. Valiente-Dobón; O. Wieland

doi:10.1016/j.physletb.2019.134835

Isospin dependence of electromagnetic transition strengths among an isobaric triplet

A. Boso, S.A. Milne, M.A. Bentley^*, F. Recchia, S.M. Lenzi, D. Rudolph, M. Labiche, X. Pereira-Lopez, S. Afara, F. Ameil, T. Arici, S. Aydin, M. Axiotis, D. Barrientos, G. Benzoni, B. Birkenbach, A.J. Boston, H.C. Boston, P. Boutachkov, A. BraccoA.M. Bruce, B. Bruyneel, B. Cederwall, E. Clement, M.L. Cortes, D.M. Cullen, P. Désesquelles, Zs. Dombràdi, C. Domingo-Pardo, J. Eberth, C. Fahlander, M. Gelain, V. González, P.R. John, J. Gerl, P. Golubev, M. Górska, A. Gottardo, T. Grahn, L. Grassi, T. Habermann, L.J. Harkness-Brennan, T.W. Henry, H. Hess, I. Kojouharov, W. Korten, N. Lalović, M. Lettmann, C. Lizarazo, C. Louchart-Henning, R. Menegazzo, D. Mengoni, E. Merchan, C. Michelagnoli, B. Million, V. Modamio, T. Moeller, D.R. Napoli, J. Nyberg, B.S. Nara Singh, H. Pai, N. Pietralla, S. Pietri, Zs. Podolyak, R.M. Perez Vidal, A. Pullia, D. Ralet, G. Rainovski, M. Reese, P. Reiter, M.D. Salsac, E. Sanchis, L.G. Sarmiento, H. Schaffner, L.M. Scruton, P.P. Singh, C. Stahl, S. Uthayakumaar, J.J. Valiente-Dobón, O. Wieland

^*Corresponding author for this work

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Abstract

Electric quadrupole matrix elements, M_p, for the J^π= 2⁺→0⁺, ΔT = 0, T = 1 transitions across the A = 46 isobaric multiplet ⁴⁶Cr-⁴⁶V-⁴⁶Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of M_p with respect to T_z. Pairs of nuclei in the T = 1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The M_p values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for ⁴⁶Cr and ⁴⁶Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in ⁴⁶V and ⁴⁶Ti. A constant value of M_p across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T = 1 isospin triplets is presented.

Original language	English
Article number	134835
Number of pages	6
Journal	Physics Letters B
Volume	797
Early online date	13 Aug 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.134835
Publication status	Published - 10 Oct 2019
Externally published	Yes

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1-s2.0-S0370269319305490-mainFinal published version, 499 KBLicence: CC BY

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Boso, A., Milne, S. A., Bentley, M. A., Recchia, F., Lenzi, S. M., Rudolph, D., Labiche, M., Pereira-Lopez, X., Afara, S., Ameil, F., Arici, T., Aydin, S., Axiotis, M., Barrientos, D., Benzoni, G., Birkenbach, B., Boston, A. J., Boston, H. C., Boutachkov, P., ... Wieland, O. (2019). Isospin dependence of electromagnetic transition strengths among an isobaric triplet. Physics Letters B, 797, Article 134835. https://doi.org/10.1016/j.physletb.2019.134835

@article{8046feabb7d1441aa7d4a5a1cc3fd197,

title = "Isospin dependence of electromagnetic transition strengths among an isobaric triplet",

abstract = "Electric quadrupole matrix elements, Mp, for the Jπ = 2+→0+, ΔT = 0, T = 1 transitions across the A = 46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T = 1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T = 1 isospin triplets is presented.",

author = "A. Boso and S.A. Milne and M.A. Bentley and F. Recchia and S.M. Lenzi and D. Rudolph and M. Labiche and X. Pereira-Lopez and S. Afara and F. Ameil and T. Arici and S. Aydin and M. Axiotis and D. Barrientos and G. Benzoni and B. Birkenbach and A.J. Boston and H.C. Boston and P. Boutachkov and A. Bracco and A.M. Bruce and B. Bruyneel and B. Cederwall and E. Clement and M.L. Cortes and D.M. Cullen and P. D{\'e}sesquelles and Zs. Dombr{\`a}di and C. Domingo-Pardo and J. Eberth and C. Fahlander and M. Gelain and V. Gonz{\'a}lez and P.R. John and J. Gerl and P. Golubev and M. G{\'o}rska and A. Gottardo and T. Grahn and L. Grassi and T. Habermann and L.J. Harkness-Brennan and T.W. Henry and H. Hess and I. Kojouharov and W. Korten and N. Lalovi{\'c} and M. Lettmann and C. Lizarazo and C. Louchart-Henning and R. Menegazzo and D. Mengoni and E. Merchan and C. Michelagnoli and B. Million and V. Modamio and T. Moeller and D.R. Napoli and J. Nyberg and {Nara Singh}, B.S. and H. Pai and N. Pietralla and S. Pietri and Zs. Podolyak and {Perez Vidal}, R.M. and A. Pullia and D. Ralet and G. Rainovski and M. Reese and P. Reiter and M.D. Salsac and E. Sanchis and L.G. Sarmiento and H. Schaffner and L.M. Scruton and P.P. Singh and C. Stahl and S. Uthayakumaar and J.J. Valiente-Dob{\'o}n and O. Wieland",

year = "2019",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2019.134835",

language = "English",

volume = "797",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Boso, A, Milne, SA, Bentley, MA, Recchia, F, Lenzi, SM, Rudolph, D, Labiche, M, Pereira-Lopez, X, Afara, S, Ameil, F, Arici, T, Aydin, S, Axiotis, M, Barrientos, D, Benzoni, G, Birkenbach, B, Boston, AJ, Boston, HC, Boutachkov, P, Bracco, A, Bruce, AM, Bruyneel, B, Cederwall, B, Clement, E, Cortes, ML, Cullen, DM, Désesquelles, P, Dombràdi, Z, Domingo-Pardo, C, Eberth, J, Fahlander, C, Gelain, M, González, V, John, PR, Gerl, J, Golubev, P, Górska, M, Gottardo, A, Grahn, T, Grassi, L, Habermann, T, Harkness-Brennan, LJ, Henry, TW, Hess, H, Kojouharov, I, Korten, W, Lalović, N, Lettmann, M, Lizarazo, C, Louchart-Henning, C, Menegazzo, R, Mengoni, D, Merchan, E, Michelagnoli, C, Million, B, Modamio, V, Moeller, T, Napoli, DR, Nyberg, J, Nara Singh, BS, Pai, H, Pietralla, N, Pietri, S, Podolyak, Z, Perez Vidal, RM, Pullia, A, Ralet, D, Rainovski, G, Reese, M, Reiter, P, Salsac, MD, Sanchis, E, Sarmiento, LG, Schaffner, H, Scruton, LM, Singh, PP, Stahl, C, Uthayakumaar, S, Valiente-Dobón, JJ & Wieland, O 2019, 'Isospin dependence of electromagnetic transition strengths among an isobaric triplet', Physics Letters B, vol. 797, 134835. https://doi.org/10.1016/j.physletb.2019.134835

TY - JOUR

T1 - Isospin dependence of electromagnetic transition strengths among an isobaric triplet

AU - Boso, A.

AU - Milne, S.A.

AU - Bentley, M.A.

AU - Recchia, F.

AU - Lenzi, S.M.

AU - Rudolph, D.

AU - Labiche, M.

AU - Pereira-Lopez, X.

AU - Afara, S.

AU - Ameil, F.

AU - Arici, T.

AU - Aydin, S.

AU - Axiotis, M.

AU - Barrientos, D.

AU - Benzoni, G.

AU - Birkenbach, B.

AU - Boston, A.J.

AU - Boston, H.C.

AU - Boutachkov, P.

AU - Bracco, A.

AU - Bruce, A.M.

AU - Bruyneel, B.

AU - Cederwall, B.

AU - Clement, E.

AU - Cortes, M.L.

AU - Cullen, D.M.

AU - Désesquelles, P.

AU - Dombràdi, Zs.

AU - Domingo-Pardo, C.

AU - Eberth, J.

AU - Fahlander, C.

AU - Gelain, M.

AU - González, V.

AU - John, P.R.

AU - Gerl, J.

AU - Golubev, P.

AU - Górska, M.

AU - Gottardo, A.

AU - Grahn, T.

AU - Grassi, L.

AU - Habermann, T.

AU - Harkness-Brennan, L.J.

AU - Henry, T.W.

AU - Hess, H.

AU - Kojouharov, I.

AU - Korten, W.

AU - Lalović, N.

AU - Lettmann, M.

AU - Lizarazo, C.

AU - Louchart-Henning, C.

AU - Menegazzo, R.

AU - Mengoni, D.

AU - Merchan, E.

AU - Michelagnoli, C.

AU - Million, B.

AU - Modamio, V.

AU - Moeller, T.

AU - Napoli, D.R.

AU - Nyberg, J.

AU - Nara Singh, B.S.

AU - Pai, H.

AU - Pietralla, N.

AU - Pietri, S.

AU - Podolyak, Zs.

AU - Perez Vidal, R.M.

AU - Pullia, A.

AU - Ralet, D.

AU - Rainovski, G.

AU - Reese, M.

AU - Reiter, P.

AU - Salsac, M.D.

AU - Sanchis, E.

AU - Sarmiento, L.G.

AU - Schaffner, H.

AU - Scruton, L.M.

AU - Singh, P.P.

AU - Stahl, C.

AU - Uthayakumaar, S.

AU - Valiente-Dobón, J.J.

AU - Wieland, O.

PY - 2019/10/10

Y1 - 2019/10/10

N2 - Electric quadrupole matrix elements, Mp, for the Jπ = 2+→0+, ΔT = 0, T = 1 transitions across the A = 46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T = 1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T = 1 isospin triplets is presented.

AB - Electric quadrupole matrix elements, Mp, for the Jπ = 2+→0+, ΔT = 0, T = 1 transitions across the A = 46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T = 1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T = 1 isospin triplets is presented.

U2 - 10.1016/j.physletb.2019.134835

DO - 10.1016/j.physletb.2019.134835

M3 - Article

SN - 0370-2693

VL - 797

JO - Physics Letters B

JF - Physics Letters B

M1 - 134835

ER -

Isospin dependence of electromagnetic transition strengths among an isobaric triplet

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