Decay of a microsecond seniority 3 isomeric state in 155Hf

B. Alayed; R. D. Page; D. T. Joss; J. Uusitalo; C. Qi; A. D. Briscoe; M. A. M. AlAqeel; B. Andel; S. Antalic; K. Auranen; Hamid Ayatollahzadeh; H. Badran; L. Barber; G. Beeton; M. Birova; V. Bogdanoff; J. G. Cubiss; D. M. Cullen; J. Deary; U. Forsberg; T. Grahn; P. T. Greenlees; J. B. Hilton; A. Illana; H. Joukainen; D. S. Judson; R. Julin; H. Jutila; J. M. Keatings; M. Labiche; M. Leino; M. C. Lewis; J. Louko; M. Luoma; I. Martel; A. McCarter; P. P. McKee; P. Mosat; S.N. Nathaniel; O. Neuvonen; D. O'Donnell; J. Ojala; C. A. A. Page; A.M. Plaza; J. Pakarinen; P. Papadakis; E. Parr; J Partanen; P. Rahkila; J. Romero; P. Ruotsalainen; M. Sandzelius; J. Sarén; B. Saygi; J. Smallcombe; J. F.  Smith; J. Sorri; C. M. Sullivan; S. Szwec; H. Tann; A. Tolosa-Delgado; E. Uusikylä; M. Venhart; L. J. Waring; G. Zimba

doi:10.1103/PhysRevC.110.034303

Decay of a microsecond seniority 3 isomeric state in ¹⁵⁵Hf

B. Alayed, R. D. Page, D. T. Joss, J. Uusitalo, C. Qi, A. D. Briscoe, M. A. M. AlAqeel, B. Andel, S. Antalic, K. Auranen, Hamid Ayatollahzadeh, H. Badran, L. Barber, G. Beeton, M. Birova, V. Bogdanoff, J. G. Cubiss, D. M. Cullen, J. Deary, U. ForsbergT. Grahn, P. T. Greenlees, J. B. Hilton, A. Illana, H. Joukainen, D. S. Judson, R. Julin, H. Jutila, J. M. Keatings, M. Labiche, M. Leino, M. C. Lewis, J. Louko, M. Luoma, I. Martel, A. McCarter, P. P. McKee, P. Mosat, S.N. Nathaniel, O. Neuvonen, D. O'Donnell, J. Ojala, C. A. A. Page, A.M. Plaza, J. Pakarinen, P. Papadakis, E. Parr, J Partanen, P. Rahkila, J. Romero, P. Ruotsalainen, M. Sandzelius, J. Sarén, B. Saygi, J. Smallcombe, J. F. Smith, J. Sorri, C. M. Sullivan, S. Szwec, H. Tann, A. Tolosa-Delgado, E. Uusikylä, M. Venhart, L. J. Waring, G. Zimba

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Abstract

Excited states in the neutron-deficient nuclide ¹⁵⁵Hf
have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The ¹⁵⁵Hf
nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV ⁵⁸Ni
ions bombarding an isotopically enriched ¹⁰²Pd target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority 𝜐=3, (𝜋⁢ℎ²_11/2⊗𝜈⁢𝑓_7/2)⁢27/2− configuration. The 𝛾-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A 𝐵⁡(𝐸⁢2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and 𝐵⁡(𝐸⁢2) value are compared with systematics and shell-model calculations.

Original language	English
Article number	034303
Number of pages	9
Journal	Physical Review C
Volume	110
DOIs	https://doi.org/10.1103/PhysRevC.110.034303
Publication status	Published - 3 Sept 2024

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10.1103/PhysRevC.110.034303Licence: CC BY 4.0

2024 08 13 Alayed et al Decay finalFinal published version, 1.12 MBLicence: CC BY 4.0

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Alayed, B., Page, R. D., Joss, D. T., Uusitalo, J., Qi, C., Briscoe, A. D., AlAqeel, M. A. M., Andel, B., Antalic, S., Auranen, K., Ayatollahzadeh, H., Badran, H., Barber, L., Beeton, G., Birova, M., Bogdanoff, V., Cubiss, J. G., Cullen, D. M., Deary, J., ... Zimba, G. (2024). Decay of a microsecond seniority 3 isomeric state in ¹⁵⁵Hf. Physical Review C, 110, Article 034303. https://doi.org/10.1103/PhysRevC.110.034303

@article{cfb9fa5a6ea34c0eaf9a6558939d3234,

title = "Decay of a microsecond seniority 3 isomeric state in 155Hf",

abstract = "Excited states in the neutron-deficient nuclide 155Hf have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyv{\"a}skyl{\"a}. The 155Hf nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV 58Ni ions bombarding an isotopically enriched 102Pd target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority 𝜐=3, (𝜋⁢ℎ211/2⊗𝜈⁢𝑓7/2)⁢27/2− configuration. The 𝛾-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A 𝐵⁡(𝐸⁢2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and 𝐵⁡(𝐸⁢2) value are compared with systematics and shell-model calculations.",

author = "B. Alayed and Page, {R. D.} and Joss, {D. T.} and J. Uusitalo and C. Qi and Briscoe, {A. D.} and AlAqeel, {M. A. M.} and B. Andel and S. Antalic and K. Auranen and Hamid Ayatollahzadeh and H. Badran and L. Barber and G. Beeton and M. Birova and V. Bogdanoff and Cubiss, {J. G.} and Cullen, {D. M.} and J. Deary and U. Forsberg and T. Grahn and Greenlees, {P. T.} and Hilton, {J. B.} and A. Illana and H. Joukainen and Judson, {D. S.} and R. Julin and H. Jutila and Keatings, {J. M.} and M. Labiche and M. Leino and Lewis, {M. C.} and J. Louko and M. Luoma and I. Martel and A. McCarter and McKee, {P. P.} and P. Mosat and S.N. Nathaniel and O. Neuvonen and D. O'Donnell and J. Ojala and Page, {C. A. A.} and A.M. Plaza and J. Pakarinen and P. Papadakis and E. Parr and J Partanen and P. Rahkila and J. Romero and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and B. Saygi and J. Smallcombe and Smith, {J. F.} and J. Sorri and Sullivan, {C. M.} and S. Szwec and H. Tann and A. Tolosa-Delgado and E. Uusikyl{\"a} and M. Venhart and Waring, {L. J.} and G. Zimba",

year = "2024",

month = sep,

day = "3",

doi = "10.1103/PhysRevC.110.034303",

language = "English",

volume = "110",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

}

Alayed, B, Page, RD, Joss, DT, Uusitalo, J, Qi, C, Briscoe, AD, AlAqeel, MAM, Andel, B, Antalic, S, Auranen, K, Ayatollahzadeh, H, Badran, H, Barber, L, Beeton, G, Birova, M, Bogdanoff, V, Cubiss, JG, Cullen, DM, Deary, J, Forsberg, U, Grahn, T, Greenlees, PT, Hilton, JB, Illana, A, Joukainen, H, Judson, DS, Julin, R, Jutila, H, Keatings, JM, Labiche, M, Leino, M, Lewis, MC, Louko, J, Luoma, M, Martel, I, McCarter, A, McKee, PP, Mosat, P, Nathaniel, SN, Neuvonen, O, O'Donnell, D, Ojala, J, Page, CAA, Plaza, AM, Pakarinen, J, Papadakis, P, Parr, E, Partanen, J, Rahkila, P, Romero, J, Ruotsalainen, P, Sandzelius, M, Sarén, J, Saygi, B, Smallcombe, J, Smith, JF, Sorri, J, Sullivan, CM, Szwec, S, Tann, H, Tolosa-Delgado, A, Uusikylä, E, Venhart, M, Waring, LJ & Zimba, G 2024, 'Decay of a microsecond seniority 3 isomeric state in ¹⁵⁵Hf', Physical Review C, vol. 110, 034303. https://doi.org/10.1103/PhysRevC.110.034303

TY - JOUR

T1 - Decay of a microsecond seniority 3 isomeric state in 155Hf

AU - Alayed, B.

AU - Page, R. D.

AU - Joss, D. T.

AU - Uusitalo, J.

AU - Qi, C.

AU - Briscoe, A. D.

AU - AlAqeel, M. A. M.

AU - Andel, B.

AU - Antalic, S.

AU - Auranen, K.

AU - Ayatollahzadeh, Hamid

AU - Badran, H.

AU - Barber, L.

AU - Beeton, G.

AU - Birova, M.

AU - Bogdanoff, V.

AU - Cubiss, J. G.

AU - Cullen, D. M.

AU - Deary, J.

AU - Forsberg, U.

AU - Grahn, T.

AU - Greenlees, P. T.

AU - Hilton, J. B.

AU - Illana, A.

AU - Joukainen, H.

AU - Judson, D. S.

AU - Julin, R.

AU - Jutila, H.

AU - Keatings, J. M.

AU - Labiche, M.

AU - Leino, M.

AU - Lewis, M. C.

AU - Louko, J.

AU - Luoma, M.

AU - Martel, I.

AU - McCarter, A.

AU - McKee, P. P.

AU - Mosat, P.

AU - Nathaniel, S.N.

AU - Neuvonen, O.

AU - O'Donnell, D.

AU - Ojala, J.

AU - Page, C. A. A.

AU - Plaza, A.M.

AU - Pakarinen, J.

AU - Papadakis, P.

AU - Parr, E.

AU - Partanen, J

AU - Rahkila, P.

AU - Romero, J.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Saygi, B.

AU - Smallcombe, J.

AU - Smith, J. F.

AU - Sorri, J.

AU - Sullivan, C. M.

AU - Szwec, S.

AU - Tann, H.

AU - Tolosa-Delgado, A.

AU - Uusikylä, E.

AU - Venhart, M.

AU - Waring, L. J.

AU - Zimba, G.

PY - 2024/9/3

Y1 - 2024/9/3

N2 - Excited states in the neutron-deficient nuclide 155Hf have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The 155Hf nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV 58Ni ions bombarding an isotopically enriched 102Pd target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority 𝜐=3, (𝜋⁢ℎ211/2⊗𝜈⁢𝑓7/2)⁢27/2− configuration. The 𝛾-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A 𝐵⁡(𝐸⁢2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and 𝐵⁡(𝐸⁢2) value are compared with systematics and shell-model calculations.

AB - Excited states in the neutron-deficient nuclide 155Hf have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The 155Hf nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV 58Ni ions bombarding an isotopically enriched 102Pd target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority 𝜐=3, (𝜋⁢ℎ211/2⊗𝜈⁢𝑓7/2)⁢27/2− configuration. The 𝛾-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A 𝐵⁡(𝐸⁢2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and 𝐵⁡(𝐸⁢2) value are compared with systematics and shell-model calculations.

U2 - 10.1103/PhysRevC.110.034303

DO - 10.1103/PhysRevC.110.034303

M3 - Article

SN - 2469-9985

VL - 110

JO - Physical Review C

JF - Physical Review C

M1 - 034303

ER -

Decay of a microsecond seniority 3 isomeric state in 155Hf

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Decay of a microsecond seniority 3 isomeric state in ¹⁵⁵Hf