First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei

G. L. Zimba; P. Ruotsalainen; D. G. Jenkins; W. Satuła; J. Uusitalo; R. Wadsworth; X. Pereira Lopez; K. Auranen; A. D. Briscoe; B. Cederwall; G. De Angelis; M. Doncel; A. Ertoprak; T. Grahn; P. T. Greenlees; A. Illana; H. Joukainen; R. Julin; H. Jutila; J. Keatings; J. Louko; M. Luoma; A. M. Plaza; J. Sarén; B. S.Nara Singh; J. Ojala; J. Pakarinen; P. Rahkila; J. Romero; A. Sood; A. Stott; C. Sullivan; H. Tann; A. Tolosa Delgado

doi:10.1103/PhysRevLett.134.022502

First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei

G. L. Zimba^*, P. Ruotsalainen, D. G. Jenkins, W. Satuła, J. Uusitalo, R. Wadsworth, X. Pereira Lopez, K. Auranen, A. D. Briscoe, B. Cederwall, G. De Angelis, M. Doncel, A. Ertoprak, T. Grahn, P. T. Greenlees, A. Illana, H. Joukainen, R. Julin, H. Jutila, J. KeatingsJ. Louko, M. Luoma, A. M. Plaza, J. Sarén, B. S.Nara Singh, J. Ojala, J. Pakarinen, P. Rahkila, J. Romero, A. Sood, A. Stott, C. Sullivan, H. Tann, A. Tolosa Delgado

^*Corresponding author for this work

Physics

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

Abstract

At a fundamental level, the interactions between protons and protons, protons and neutrons, and neutrons and neutrons are not identical. Such isospin nonconserving interactions emerge when comparing the excitation energy of analog states in T=1 triplet nuclei. Here, we extend such an analysis to the A=78, T=1 triplet system - the heaviest system for which such complete data exists - and find strong disagreement with contemporary theory. This was achieved by pioneering the technique of recoil-β-β tagging to identify excited states in Zr78. We also established a Zr78 half-life of 25-8+17 ms and extended the T=1 band in Y78 to Jπ=(10+).

Original language	English
Article number	022502
Number of pages	8
Journal	Physical Review Letters
Volume	134
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.134.022502
Publication status	Published - 17 Jan 2025

Bibliographical note

Access to Document

10.1103/PhysRevLett.134.022502

LU19474
© 2025 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the University’s Research Publications and Open Access policy.
Accepted author manuscript, 706 KBLicence: CC BY

Cite this

Zimba, G. L., Ruotsalainen, P., Jenkins, D. G., Satuła, W., Uusitalo, J., Wadsworth, R., Lopez, X. P., Auranen, K., Briscoe, A. D., Cederwall, B., De Angelis, G., Doncel, M., Ertoprak, A., Grahn, T., Greenlees, P. T., Illana, A., Joukainen, H., Julin, R., Jutila, H., ... Delgado, A. T. (2025). First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei. Physical Review Letters, 134(2), Article 022502. https://doi.org/10.1103/PhysRevLett.134.022502

@article{0a627de499274632a444a596c9c997b3,

title = "First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei",

abstract = "At a fundamental level, the interactions between protons and protons, protons and neutrons, and neutrons and neutrons are not identical. Such isospin nonconserving interactions emerge when comparing the excitation energy of analog states in T=1 triplet nuclei. Here, we extend such an analysis to the A=78, T=1 triplet system - the heaviest system for which such complete data exists - and find strong disagreement with contemporary theory. This was achieved by pioneering the technique of recoil-β-β tagging to identify excited states in Zr78. We also established a Zr78 half-life of 25-8+17 ms and extended the T=1 band in Y78 to Jπ=(10+).",

author = "Zimba, {G. L.} and P. Ruotsalainen and Jenkins, {D. G.} and W. Satu{\l}a and J. Uusitalo and R. Wadsworth and Lopez, {X. Pereira} and K. Auranen and Briscoe, {A. D.} and B. Cederwall and {De Angelis}, G. and M. Doncel and A. Ertoprak and T. Grahn and Greenlees, {P. T.} and A. Illana and H. Joukainen and R. Julin and H. Jutila and J. Keatings and J. Louko and M. Luoma and Plaza, {A. M.} and J. Sar{\'e}n and Singh, {B. S.Nara} and J. Ojala and J. Pakarinen and P. Rahkila and J. Romero and A. Sood and A. Stott and C. Sullivan and H. Tann and Delgado, {A. Tolosa}",

note = "{\textcopyright} 2025 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the University{\textquoteright}s Research Publications and Open Access policy. ",

year = "2025",

month = jan,

day = "17",

doi = "10.1103/PhysRevLett.134.022502",

language = "English",

volume = "134",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

Zimba, GL, Ruotsalainen, P, Jenkins, DG, Satuła, W, Uusitalo, J, Wadsworth, R, Lopez, XP, Auranen, K, Briscoe, AD, Cederwall, B, De Angelis, G, Doncel, M, Ertoprak, A, Grahn, T, Greenlees, PT, Illana, A, Joukainen, H, Julin, R, Jutila, H, Keatings, J, Louko, J, Luoma, M, Plaza, AM, Sarén, J, Singh, BSN, Ojala, J, Pakarinen, J, Rahkila, P, Romero, J, Sood, A, Stott, A, Sullivan, C, Tann, H & Delgado, AT 2025, 'First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei', Physical Review Letters, vol. 134, no. 2, 022502. https://doi.org/10.1103/PhysRevLett.134.022502

TY - JOUR

T1 - First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei

AU - Zimba, G. L.

AU - Ruotsalainen, P.

AU - Jenkins, D. G.

AU - Satuła, W.

AU - Uusitalo, J.

AU - Wadsworth, R.

AU - Lopez, X. Pereira

AU - Auranen, K.

AU - Briscoe, A. D.

AU - Cederwall, B.

AU - De Angelis, G.

AU - Doncel, M.

AU - Ertoprak, A.

AU - Grahn, T.

AU - Greenlees, P. T.

AU - Illana, A.

AU - Joukainen, H.

AU - Julin, R.

AU - Jutila, H.

AU - Keatings, J.

AU - Louko, J.

AU - Luoma, M.

AU - Plaza, A. M.

AU - Sarén, J.

AU - Singh, B. S.Nara

AU - Ojala, J.

AU - Pakarinen, J.

AU - Rahkila, P.

AU - Romero, J.

AU - Sood, A.

AU - Stott, A.

AU - Sullivan, C.

AU - Tann, H.

AU - Delgado, A. Tolosa

PY - 2025/1/17

Y1 - 2025/1/17

N2 - At a fundamental level, the interactions between protons and protons, protons and neutrons, and neutrons and neutrons are not identical. Such isospin nonconserving interactions emerge when comparing the excitation energy of analog states in T=1 triplet nuclei. Here, we extend such an analysis to the A=78, T=1 triplet system - the heaviest system for which such complete data exists - and find strong disagreement with contemporary theory. This was achieved by pioneering the technique of recoil-β-β tagging to identify excited states in Zr78. We also established a Zr78 half-life of 25-8+17 ms and extended the T=1 band in Y78 to Jπ=(10+).

AB - At a fundamental level, the interactions between protons and protons, protons and neutrons, and neutrons and neutrons are not identical. Such isospin nonconserving interactions emerge when comparing the excitation energy of analog states in T=1 triplet nuclei. Here, we extend such an analysis to the A=78, T=1 triplet system - the heaviest system for which such complete data exists - and find strong disagreement with contemporary theory. This was achieved by pioneering the technique of recoil-β-β tagging to identify excited states in Zr78. We also established a Zr78 half-life of 25-8+17 ms and extended the T=1 band in Y78 to Jπ=(10+).

UR - http://www.scopus.com/inward/record.url?scp=85214996542&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.134.022502

DO - 10.1103/PhysRevLett.134.022502

M3 - Article

AN - SCOPUS:85214996542

SN - 0031-9007

VL - 134

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 022502

ER -

First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei

Abstract

Bibliographical note

Access to Document

Other files and links

Nuclear Physics Consolidated Grant 2021-2024

Nuclear Physics Consolidated Grant

Cite this

First Identification of Excited States in Zr 78 and Implications for Isospin Nonconserving Forces in Nuclei

Abstract

Bibliographical note

Access to Document

Other files and links

Projects

Nuclear Physics Consolidated Grant 2021-2024

Nuclear Physics Consolidated Grant

Cite this