Fine structure in the α decay of high-spin isomers in 155Lu and 156Hf

E. Parr; R.D. Page; D.T. Joss; F.A. Ali; K. Auranen; L. Capponi; T. Grahn; P.T. Greenlees; J. Henderson; A. Herzan; U. Jakobsson; R. Julin; S. Juutinen; J. Konki; M. Labiche; M. Leino; P.J.R. Mason; C. McPeake; D. O'Donnell; J. Pakarinen; P. Papadakis; J. Partanen; P. Peura; P. Rahkila; J.P. Revill; P. Ruotsalainen; M. Sandzelius; J. Saren; C. Scholey; J. Simpson; J.F. Smith; M. Smolen; J. Sorri; S. Stolze; A. Thornthwaite; J. Uusitalo

doi:10.1103/PhysRevC.98.024321

Fine structure in the α decay of high-spin isomers in ¹⁵⁵Lu and ¹⁵⁶Hf

E. Parr, R.D. Page, D.T. Joss, F.A. Ali, K. Auranen, L. Capponi, T. Grahn, P.T. Greenlees, J. Henderson, A. Herzan, U. Jakobsson, R. Julin, S. Juutinen, J. Konki, M. Labiche, M. Leino, P.J.R. Mason, C. McPeake, D. O'Donnell, J. PakarinenP. Papadakis, J. Partanen, P. Peura, P. Rahkila, J.P. Revill, P. Ruotsalainen, M. Sandzelius, J. Saren, C. Scholey, J. Simpson, J.F. Smith, M. Smolen, J. Sorri, S. Stolze, A. Thornthwaite, J. Uusitalo

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Abstract

Fine structure in the α decay of high-spin isomers in ¹⁵⁵Lu (25/2⁻) and ¹⁵⁶Hf (8⁺) has been studied for the first time using αγ-coincidence analysis. Three new α decays from ¹⁵⁵Lu (25/2⁻) and two from ¹⁵⁶Hf (8⁺) have been identified, populating seniority s > 1 states in the N = 82 nuclei ¹⁵¹Tm and ¹⁵²Yb, respectively. The reduced hindrance factors of the α decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following α decay in nuclei outside of the ²⁰⁸Pb region.

Original language	English
Article number	024321
Journal	Physical Review C
Volume	98
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.98.024321
Publication status	Published - 29 Aug 2018

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2018 08 29 Parr et al IsomersAccepted author manuscript, 283 KB

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Parr, E., Page, R. D., Joss, D. T., Ali, F. A., Auranen, K., Capponi, L., Grahn, T., Greenlees, P. T., Henderson, J., Herzan, A., Jakobsson, U., Julin, R., Juutinen, S., Konki, J., Labiche, M., Leino, M., Mason, P. J. R., McPeake, C., O'Donnell, D., ... Uusitalo, J. (2018). Fine structure in the α decay of high-spin isomers in ¹⁵⁵Lu and ¹⁵⁶Hf. Physical Review C, 98(2), Article 024321. https://doi.org/10.1103/PhysRevC.98.024321

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title = "Fine structure in the α decay of high-spin isomers in 155Lu and 156Hf",

abstract = "Fine structure in the α decay of high-spin isomers in 155Lu (25/2−) and 156Hf (8+) has been studied for the first time using αγ-coincidence analysis. Three new α decays from 155Lu (25/2−) and two from 156Hf (8+) have been identified, populating seniority s > 1 states in the N = 82 nuclei 151Tm and 152Yb, respectively. The reduced hindrance factors of the α decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following α decay in nuclei outside of the 208Pb region.",

author = "E. Parr and R.D. Page and D.T. Joss and F.A. Ali and K. Auranen and L. Capponi and T. Grahn and P.T. Greenlees and J. Henderson and A. Herzan and U. Jakobsson and R. Julin and S. Juutinen and J. Konki and M. Labiche and M. Leino and P.J.R. Mason and C. McPeake and D. O'Donnell and J. Pakarinen and P. Papadakis and J. Partanen and P. Peura and P. Rahkila and J.P. Revill and P. Ruotsalainen and M. Sandzelius and J. Saren and C. Scholey and J. Simpson and J.F. Smith and M. Smolen and J. Sorri and S. Stolze and A. Thornthwaite and J. Uusitalo",

year = "2018",

month = aug,

day = "29",

doi = "10.1103/PhysRevC.98.024321",

language = "English",

volume = "98",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

Parr, E, Page, RD, Joss, DT, Ali, FA, Auranen, K, Capponi, L, Grahn, T, Greenlees, PT, Henderson, J, Herzan, A, Jakobsson, U, Julin, R, Juutinen, S, Konki, J, Labiche, M, Leino, M, Mason, PJR, McPeake, C, O'Donnell, D, Pakarinen, J, Papadakis, P, Partanen, J, Peura, P, Rahkila, P, Revill, JP, Ruotsalainen, P, Sandzelius, M, Saren, J, Scholey, C, Simpson, J, Smith, JF, Smolen, M, Sorri, J, Stolze, S, Thornthwaite, A & Uusitalo, J 2018, 'Fine structure in the α decay of high-spin isomers in ¹⁵⁵Lu and ¹⁵⁶Hf', Physical Review C, vol. 98, no. 2, 024321. https://doi.org/10.1103/PhysRevC.98.024321

TY - JOUR

T1 - Fine structure in the α decay of high-spin isomers in 155Lu and 156Hf

AU - Parr, E.

AU - Page, R.D.

AU - Joss, D.T.

AU - Ali, F.A.

AU - Auranen, K.

AU - Capponi, L.

AU - Grahn, T.

AU - Greenlees, P.T.

AU - Henderson, J.

AU - Herzan, A.

AU - Jakobsson, U.

AU - Julin, R.

AU - Juutinen, S.

AU - Konki, J.

AU - Labiche, M.

AU - Leino, M.

AU - Mason, P.J.R.

AU - McPeake, C.

AU - O'Donnell, D.

AU - Pakarinen, J.

AU - Papadakis, P.

AU - Partanen, J.

AU - Peura, P.

AU - Rahkila, P.

AU - Revill, J.P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Saren, J.

AU - Scholey, C.

AU - Simpson, J.

AU - Smith, J.F.

AU - Smolen, M.

AU - Sorri, J.

AU - Stolze, S.

AU - Thornthwaite, A.

AU - Uusitalo, J.

PY - 2018/8/29

Y1 - 2018/8/29

N2 - Fine structure in the α decay of high-spin isomers in 155Lu (25/2−) and 156Hf (8+) has been studied for the first time using αγ-coincidence analysis. Three new α decays from 155Lu (25/2−) and two from 156Hf (8+) have been identified, populating seniority s > 1 states in the N = 82 nuclei 151Tm and 152Yb, respectively. The reduced hindrance factors of the α decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following α decay in nuclei outside of the 208Pb region.

AB - Fine structure in the α decay of high-spin isomers in 155Lu (25/2−) and 156Hf (8+) has been studied for the first time using αγ-coincidence analysis. Three new α decays from 155Lu (25/2−) and two from 156Hf (8+) have been identified, populating seniority s > 1 states in the N = 82 nuclei 151Tm and 152Yb, respectively. The reduced hindrance factors of the α decays support the previous configuration assignments of the populated states. This is the first observation of states with excitation energy greater than 1.5 MeV being populated following α decay in nuclei outside of the 208Pb region.

U2 - 10.1103/PhysRevC.98.024321

DO - 10.1103/PhysRevC.98.024321

M3 - Article

SN - 2469-9985

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024321

ER -

Fine structure in the α decay of high-spin isomers in 155Lu and 156Hf

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Fine structure in the α decay of high-spin isomers in ¹⁵⁵Lu and ¹⁵⁶Hf