Isospin mixing in 64,66Ga reexamined via total absorption spectroscopy

S. Parra; E. Nácher; B. Rubio; W. Gelletly; J. A. Briz; J. Agramunt; A. Algora; P. Aguilera; T. Berry; M. J. G. Borge; M. Carmona-Gallardo; L. M. Fraile; A. Illana; E. Ganioglu; V. Guadilla; U. Köster; R. Lică; I. Marroquín; F. Molina; A. B. Morales; B. S. Nara Singh; J. N. Orce; S. E. A. Orrigo; A. Perea; J. Romero-Barrientos; C. Sotty; O. Tengblad; J. L. Taín; A. Tolosa-Delgado; V. Vaquero; V. Vedia

doi:10.1103/14qx-4jh6

Isospin mixing in ^64,66Ga reexamined via total absorption spectroscopy

S. Parra
, E. Nácher^*
, B. Rubio
, W. Gelletly
, J. A. Briz
, J. Agramunt
, A. Algora
, P. Aguilera
, T. Berry
, M. J. G. Borge
, M. Carmona-Gallardo
, L. M. Fraile
, A. Illana
, E. Ganioglu
, V. Guadilla
, U. Köster
, R. Lică
, I. Marroquín
, F. Molina
, A. B. Morales

B. S. Nara Singh, J. N. Orce, S. E. A. Orrigo, A. Perea, J. Romero-Barrientos, C. Sotty, O. Tengblad, J. L. Taín, A. Tolosa-Delgado, V. Vaquero, V. Vedia

^*Corresponding author for this work

School of Computing, Engineering and Physical Sciences

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

Abstract

New measurements of the β decay of ⁶⁴Ga and ⁶⁶Ga have been carried out using total absorption spectroscopy at CERN-ISOLDE. The purpose of the study was to determine whether systemic effects such as Pandemonium have affected previous measurements and also determine the degree of isospin mixing in these proton-rich nuclei. Our results show that the β strength distribution of ⁶⁴Ga was previously underestimated, while that of ⁶⁶Ga agrees well with previous high-resolution measurements. The results allowed us to determine the amount of isospin mixing in the 0⁺→0⁺ transitions to the ground states of the daughter nuclei. From the extracted log⁡𝑓⁡𝑡 values, we determined the isospin mixing parameter 𝛼 for the two cases. They were found to be consistent with values for similar transitions in other nuclei. ⁶⁴Ga exhibits the largest amount of isospin mixing in such nuclei. These findings improve our understanding of beta decay and have implications for nuclear structure models and medical applications of ⁶⁶Ga
in PET imaging.

Original language	English
Article number	064328
Number of pages	9
Journal	Physical Review C
Volume	112
DOIs	https://doi.org/10.1103/14qx-4jh6
Publication status	Published - 24 Dec 2025

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2025 10 24 Parra et al Isospin finalFinal published version, 1.25 MBLicence: CC BY 4.0

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Parra, S., Nácher, E., Rubio, B., Gelletly, W., Briz, J. A., Agramunt, J., Algora, A., Aguilera, P., Berry, T., Borge, M. J. G., Carmona-Gallardo, M., Fraile, L. M., Illana, A., Ganioglu, E., Guadilla, V., Köster, U., Lică, R., Marroquín, I., Molina, F., ... Vedia, V. (2025). Isospin mixing in ^64,66Ga reexamined via total absorption spectroscopy. Physical Review C, 112, Article 064328. https://doi.org/10.1103/14qx-4jh6

@article{98fb9f74ee454dc795d0311451d9da39,

title = "Isospin mixing in 64,66Ga reexamined via total absorption spectroscopy",

abstract = "New measurements of the β decay of 64Ga and 66Ga have been carried out using total absorption spectroscopy at CERN-ISOLDE. The purpose of the study was to determine whether systemic effects such as Pandemonium have affected previous measurements and also determine the degree of isospin mixing in these proton-rich nuclei. Our results show that the β strength distribution of 64Ga was previously underestimated, while that of 66Ga agrees well with previous high-resolution measurements. The results allowed us to determine the amount of isospin mixing in the 0+→0+ transitions to the ground states of the daughter nuclei. From the extracted log⁡𝑓⁡𝑡 values, we determined the isospin mixing parameter 𝛼 for the two cases. They were found to be consistent with values for similar transitions in other nuclei. 64Ga exhibits the largest amount of isospin mixing in such nuclei. These findings improve our understanding of beta decay and have implications for nuclear structure models and medical applications of 66Ga in PET imaging.",

author = "S. Parra and E. N{\'a}cher and B. Rubio and W. Gelletly and Briz, \{J. A.\} and J. Agramunt and A. Algora and P. Aguilera and T. Berry and Borge, \{M. J. G.\} and M. Carmona-Gallardo and Fraile, \{L. M.\} and A. Illana and E. Ganioglu and V. Guadilla and U. K{\"o}ster and R. Lic{\u a} and I. Marroqu{\'i}n and F. Molina and Morales, \{A. B.\} and \{Nara Singh\}, \{B. S.\} and Orce, \{J. N.\} and Orrigo, \{S. E. A.\} and A. Perea and J. Romero-Barrientos and C. Sotty and O. Tengblad and Ta{\'i}n, \{J. L.\} and A. Tolosa-Delgado and V. Vaquero and V. Vedia",

year = "2025",

month = dec,

day = "24",

doi = "10.1103/14qx-4jh6",

language = "English",

volume = "112",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

}

Parra, S, Nácher, E, Rubio, B, Gelletly, W, Briz, JA, Agramunt, J, Algora, A, Aguilera, P, Berry, T, Borge, MJG, Carmona-Gallardo, M, Fraile, LM, Illana, A, Ganioglu, E, Guadilla, V, Köster, U, Lică, R, Marroquín, I, Molina, F, Morales, AB, Nara Singh, BS, Orce, JN, Orrigo, SEA, Perea, A, Romero-Barrientos, J, Sotty, C, Tengblad, O, Taín, JL, Tolosa-Delgado, A, Vaquero, V & Vedia, V 2025, 'Isospin mixing in ^64,66Ga reexamined via total absorption spectroscopy', Physical Review C, vol. 112, 064328. https://doi.org/10.1103/14qx-4jh6

TY - JOUR

T1 - Isospin mixing in 64,66Ga reexamined via total absorption spectroscopy

AU - Parra, S.

AU - Nácher, E.

AU - Rubio, B.

AU - Gelletly, W.

AU - Briz, J. A.

AU - Agramunt, J.

AU - Algora, A.

AU - Aguilera, P.

AU - Berry, T.

AU - Borge, M. J. G.

AU - Carmona-Gallardo, M.

AU - Fraile, L. M.

AU - Illana, A.

AU - Ganioglu, E.

AU - Guadilla, V.

AU - Köster, U.

AU - Lică, R.

AU - Marroquín, I.

AU - Molina, F.

AU - Morales, A. B.

AU - Nara Singh, B. S.

AU - Orce, J. N.

AU - Orrigo, S. E. A.

AU - Perea, A.

AU - Romero-Barrientos, J.

AU - Sotty, C.

AU - Tengblad, O.

AU - Taín, J. L.

AU - Tolosa-Delgado, A.

AU - Vaquero, V.

AU - Vedia, V.

PY - 2025/12/24

Y1 - 2025/12/24

N2 - New measurements of the β decay of 64Ga and 66Ga have been carried out using total absorption spectroscopy at CERN-ISOLDE. The purpose of the study was to determine whether systemic effects such as Pandemonium have affected previous measurements and also determine the degree of isospin mixing in these proton-rich nuclei. Our results show that the β strength distribution of 64Ga was previously underestimated, while that of 66Ga agrees well with previous high-resolution measurements. The results allowed us to determine the amount of isospin mixing in the 0+→0+ transitions to the ground states of the daughter nuclei. From the extracted log⁡𝑓⁡𝑡 values, we determined the isospin mixing parameter 𝛼 for the two cases. They were found to be consistent with values for similar transitions in other nuclei. 64Ga exhibits the largest amount of isospin mixing in such nuclei. These findings improve our understanding of beta decay and have implications for nuclear structure models and medical applications of 66Ga in PET imaging.

AB - New measurements of the β decay of 64Ga and 66Ga have been carried out using total absorption spectroscopy at CERN-ISOLDE. The purpose of the study was to determine whether systemic effects such as Pandemonium have affected previous measurements and also determine the degree of isospin mixing in these proton-rich nuclei. Our results show that the β strength distribution of 64Ga was previously underestimated, while that of 66Ga agrees well with previous high-resolution measurements. The results allowed us to determine the amount of isospin mixing in the 0+→0+ transitions to the ground states of the daughter nuclei. From the extracted log⁡𝑓⁡𝑡 values, we determined the isospin mixing parameter 𝛼 for the two cases. They were found to be consistent with values for similar transitions in other nuclei. 64Ga exhibits the largest amount of isospin mixing in such nuclei. These findings improve our understanding of beta decay and have implications for nuclear structure models and medical applications of 66Ga in PET imaging.

U2 - 10.1103/14qx-4jh6

DO - 10.1103/14qx-4jh6

M3 - Article

SN - 2469-9985

VL - 112

JO - Physical Review C

JF - Physical Review C

M1 - 064328

ER -

Isospin mixing in 64,66Ga reexamined via total absorption spectroscopy

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Isospin mixing in ^64,66Ga reexamined via total absorption spectroscopy