Direct observation of E0 transitions in 188Pb through in-beam spectroscopy

P. Papadakis; J. Pakarinen; A.D. Briscoe; D.M. Cox; R. Julin; K. Auranen; T. Grahn; P.T. Greenlees; K. Hadyńska-Klek; A. Herzáň; R.-D. Herzberg; U. Jakobsson; S. Juutinen; J. Konki; M. Leino; A. Mistry; D. O'Donnell; P. Peura; P. Rahkila; P. Ruotsalainen; M. Sandzelius; J. Sarén; C. Scholey; S. Stoltze; J. Sorri; J. Uusitalo; K. Wrzosek-Lipska

doi:10.1016/j.physletb.2024.139048

Direct observation of E0 transitions in ¹⁸⁸Pb through in-beam spectroscopy

P. Papadakis^*
, J. Pakarinen
, A.D. Briscoe
, D.M. Cox
, R. Julin
, K. Auranen
, T. Grahn
, P.T. Greenlees
, K. Hadyńska-Klek
, A. Herzáň
, R.-D. Herzberg
, U. Jakobsson
, S. Juutinen
, J. Konki
, M. Leino
, A. Mistry
, D. O'Donnell
, P. Peura
, P. Rahkila
, P. Ruotsalainen

M. Sandzelius, J. Sarén, C. Scholey, S. Stoltze, J. Sorri, J. Uusitalo, K. Wrzosek-Lipska

^*Corresponding author for this work

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

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Abstract

Competing configurations, assigned with three different shapes, are mixed at low angular momentum in the neutron-deficient ¹⁸⁸Pb nucleus. Here, we present a simultaneous conversion electron and γ-ray in-beam spectroscopic precision measurement employing the sage spectrometer. The level energy of the first excited state, 0⁺₂, has been determined at 591(1) keV through direct measurement of conversion electrons. By using the intensity of the observed 0⁺₂→0⁺₁ transition to the ground state, the feeding of the 0⁺₂ state has been determined for the first time, which suggests the 0⁺₂ state is the head of the predominantly prolate band. The compositions of the 4⁺₂→4⁺₁and 2⁺₂→2⁺₁ inter-band transitions have been determined, indicating configuration mixing between the bands.

Original language	English
Article number	139048
Number of pages	8
Journal	Physics Letters B
Volume	858
DOIs	https://doi.org/10.1016/j.physletb.2024.139048
Publication status	Published - 27 Sept 2024
Externally published	Yes

Keywords

in-beam spectroscopy
shape coexistence
internal conversion electrons

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10.1016/j.physletb.2024.139048Licence: CC BY 4.0

2024 09 25 Papadakis et al Direct finalFinal published version, 0.99 MBLicence: CC BY 4.0

Cite this

Papadakis, P., Pakarinen, J., Briscoe, A. D., Cox, D. M., Julin, R., Auranen, K., Grahn, T., Greenlees, P. T., Hadyńska-Klek, K., Herzáň, A., Herzberg, R.-D., Jakobsson, U., Juutinen, S., Konki, J., Leino, M., Mistry, A., O'Donnell, D., Peura, P., Rahkila, P., ... Wrzosek-Lipska, K. (2024). Direct observation of E0 transitions in ¹⁸⁸Pb through in-beam spectroscopy. Physics Letters B, 858, Article 139048. https://doi.org/10.1016/j.physletb.2024.139048

@article{2efb4a73e4da44dcbfaea4667b3fc107,

title = "Direct observation of E0 transitions in 188Pb through in-beam spectroscopy",

abstract = "Competing configurations, assigned with three different shapes, are mixed at low angular momentum in the neutron-deficient 188Pb nucleus. Here, we present a simultaneous conversion electron and γ-ray in-beam spectroscopic precision measurement employing the sage spectrometer. The level energy of the first excited state, 0+2, has been determined at 591(1) keV through direct measurement of conversion electrons. By using the intensity of the observed 0+2→0+1 transition to the ground state, the feeding of the 0+2 state has been determined for the first time, which suggests the 0+2 state is the head of the predominantly prolate band. The compositions of the 4+2→4+1 and 2+2→2+1 inter-band transitions have been determined, indicating configuration mixing between the bands.",

keywords = "in-beam spectroscopy, shape coexistence, internal conversion electrons",

author = "P. Papadakis and J. Pakarinen and A.D. Briscoe and D.M. Cox and R. Julin and K. Auranen and T. Grahn and P.T. Greenlees and K. Hady{\'n}ska-Klek and A. Herz{\'a}{\v n} and R.-D. Herzberg and U. Jakobsson and S. Juutinen and J. Konki and M. Leino and A. Mistry and D. O'Donnell and P. Peura and P. Rahkila and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and C. Scholey and S. Stoltze and J. Sorri and J. Uusitalo and K. Wrzosek-Lipska",

year = "2024",

month = sep,

day = "27",

doi = "10.1016/j.physletb.2024.139048",

language = "English",

volume = "858",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Papadakis, P, Pakarinen, J, Briscoe, AD, Cox, DM, Julin, R, Auranen, K, Grahn, T, Greenlees, PT, Hadyńska-Klek, K, Herzáň, A, Herzberg, R-D, Jakobsson, U, Juutinen, S, Konki, J, Leino, M, Mistry, A, O'Donnell, D, Peura, P, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sarén, J, Scholey, C, Stoltze, S, Sorri, J, Uusitalo, J & Wrzosek-Lipska, K 2024, 'Direct observation of E0 transitions in ¹⁸⁸Pb through in-beam spectroscopy', Physics Letters B, vol. 858, 139048. https://doi.org/10.1016/j.physletb.2024.139048

TY - JOUR

T1 - Direct observation of E0 transitions in 188Pb through in-beam spectroscopy

AU - Papadakis, P.

AU - Pakarinen, J.

AU - Briscoe, A.D.

AU - Cox, D.M.

AU - Julin, R.

AU - Auranen, K.

AU - Grahn, T.

AU - Greenlees, P.T.

AU - Hadyńska-Klek, K.

AU - Herzáň, A.

AU - Herzberg, R.-D.

AU - Jakobsson, U.

AU - Juutinen, S.

AU - Konki, J.

AU - Leino, M.

AU - Mistry, A.

AU - O'Donnell, D.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Scholey, C.

AU - Stoltze, S.

AU - Sorri, J.

AU - Uusitalo, J.

AU - Wrzosek-Lipska, K.

PY - 2024/9/27

Y1 - 2024/9/27

N2 - Competing configurations, assigned with three different shapes, are mixed at low angular momentum in the neutron-deficient 188Pb nucleus. Here, we present a simultaneous conversion electron and γ-ray in-beam spectroscopic precision measurement employing the sage spectrometer. The level energy of the first excited state, 0+2, has been determined at 591(1) keV through direct measurement of conversion electrons. By using the intensity of the observed 0+2→0+1 transition to the ground state, the feeding of the 0+2 state has been determined for the first time, which suggests the 0+2 state is the head of the predominantly prolate band. The compositions of the 4+2→4+1 and 2+2→2+1 inter-band transitions have been determined, indicating configuration mixing between the bands.

AB - Competing configurations, assigned with three different shapes, are mixed at low angular momentum in the neutron-deficient 188Pb nucleus. Here, we present a simultaneous conversion electron and γ-ray in-beam spectroscopic precision measurement employing the sage spectrometer. The level energy of the first excited state, 0+2, has been determined at 591(1) keV through direct measurement of conversion electrons. By using the intensity of the observed 0+2→0+1 transition to the ground state, the feeding of the 0+2 state has been determined for the first time, which suggests the 0+2 state is the head of the predominantly prolate band. The compositions of the 4+2→4+1 and 2+2→2+1 inter-band transitions have been determined, indicating configuration mixing between the bands.

KW - in-beam spectroscopy

KW - shape coexistence

KW - internal conversion electrons

U2 - 10.1016/j.physletb.2024.139048

DO - 10.1016/j.physletb.2024.139048

M3 - Letter

SN - 0370-2693

VL - 858

JO - Physics Letters B

JF - Physics Letters B

M1 - 139048

ER -

Direct observation of E0 transitions in 188Pb through in-beam spectroscopy

Abstract

Keywords

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Direct observation of E0 transitions in ¹⁸⁸Pb through in-beam spectroscopy