Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W

A.D. Briscoe; R.D. Page; J. Uusitalo; D.T. Joss; M.A.M. AlAqeel; B. Alayed; B. Andel; S. Antalic; K. Auranen; H. Ayatollahzadeh; H. Badran; L. Barber; G. Beeton; M. Birova; V. Bogdanoff; R.M. Clark; 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; 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:10.1016/j.physletb.2023.138310

Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W

A.D. Briscoe, R.D. Page, J. Uusitalo, D.T. Joss, M.A.M. AlAqeel, B. Alayed, B. Andel, S. Antalic, K. Auranen, H. Ayatollahzadeh, H. Badran, L. Barber, G. Beeton, M. Birova, V. Bogdanoff, R.M. Clark, 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, 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

Physics

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Abstract

The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms.

Original language	English
Article number	138310
Number of pages	8
Journal	Physics Letters B
Early online date	16 Nov 2023
DOIs	https://doi.org/10.1016/j.physletb.2023.138310
Publication status	Published - 10 Dec 2023

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1-s2.0-S0370269323006445-main
© 2023 The Authors.
Final published version, 1.73 MBLicence: CC BY

Nuclear Physics Consolidated Grant 2021-2024
Jenkins, D. (Principal investigator), Andreyev, A. (Co-investigator), Bashkanov, M. (Co-investigator), Bentley, M. (Co-investigator), Dobaczewski, J. J. (Co-investigator), Laird, A. M. (Co-investigator), Paschalis, S. (Co-investigator), Pastore, A. (Co-investigator), Petri, M. (Co-investigator), Wadsworth, R. (Co-investigator), Watts, D. (Co-investigator) & Zachariou, N. (Co-investigator)
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/10/21 → 31/03/25
Project: Research project (funded) › Research

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Briscoe, A. D., Page, R. D., Uusitalo, J., Joss, D. T., AlAqeel, M. A. M., Alayed, B., Andel, B., Antalic, S., Auranen, K., Ayatollahzadeh, H., Badran, H., Barber, L., Beeton, G., Birova, M., Bogdanoff, V., Clark, R. M., Cubiss, J. G., Cullen, D. M., Deary, J., ... Zimba, G. (2023). Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W. Physics Letters B, Article 138310. https://doi.org/10.1016/j.physletb.2023.138310

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title = "Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W",

abstract = "The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyv{\"a}skyl{\"a}. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms.",

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

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doi = "10.1016/j.physletb.2023.138310",

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Briscoe, AD, Page, RD, Uusitalo, J, Joss, DT, AlAqeel, MAM, Alayed, B, Andel, B, Antalic, S, Auranen, K, Ayatollahzadeh, H, Badran, H, Barber, L, Beeton, G, Birova, M, Bogdanoff, V, Clark, RM, 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, 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 2023, 'Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W', Physics Letters B. https://doi.org/10.1016/j.physletb.2023.138310

TY - JOUR

T1 - Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W

AU - Briscoe, A.D.

AU - Page, R.D.

AU - Uusitalo, J.

AU - Joss, D.T.

AU - AlAqeel, M.A.M.

AU - Alayed, B.

AU - Andel, B.

AU - Antalic, S.

AU - Auranen, K.

AU - Ayatollahzadeh, H.

AU - Badran, H.

AU - Barber, L.

AU - Beeton, G.

AU - Birova, M.

AU - Bogdanoff, V.

AU - Clark, R.M.

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 - 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 - 2023/12/10

Y1 - 2023/12/10

N2 - The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms.

AB - The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms.

U2 - 10.1016/j.physletb.2023.138310

DO - 10.1016/j.physletb.2023.138310

M3 - Article

SN - 0370-2693

JO - Physics Letters B

JF - Physics Letters B

M1 - 138310

ER -

Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W

Abstract

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Nuclear Physics Consolidated Grant 2021-2024

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