Low-lying states in 219Ra and 215Rn: Sampling microsecond α-decaying nuclei

A. Såmark-Roth; L. G. Sarmiento; D. Rudolph; J. Ljungberg; B. G. Carlsson; C. Fahlander; U. Forsberg; P. Golubev; I. Ragnarsson; D. Ackermann; L. L. Andersson; M. Block; H. Brand; D. M. Cox; A. Di Nitto; Ch E. Düllmann; K. Eberhardt; J. Even; J. M. Gates; J. Gerl; K. E. Gregorich; C. J. Gross; R. D. Herzberg; F. P. Heßberger; E. Jäger; J. Khuyagbaatar; B. Kindler; I. Kojouharov; J. V. Kratz; J. Krier; N. Kurz; B. Lommel; A. Mistry; C. Mokry; J. P. Omtvedt; P. Papadakis; J. Runke; K. Rykaczewski; M. Schädel; H. Schaffner; B. Schausten; P. Thörle-Pospiech; N. Trautmann; T. Torres; A. Türler; A. Ward; N. Wiehl; A. Yakushev

doi:10.1103/PhysRevC.98.044307

Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei

A. Såmark-Roth, L. G. Sarmiento, D. Rudolph, J. Ljungberg, B. G. Carlsson, C. Fahlander, U. Forsberg, P. Golubev, I. Ragnarsson, D. Ackermann, L. L. Andersson, M. Block, H. Brand, D. M. Cox, A. Di Nitto, Ch E. Düllmann, K. Eberhardt, J. Even, J. M. Gates, J. GerlK. E. Gregorich, C. J. Gross, R. D. Herzberg, F. P. Heßberger, E. Jäger, J. Khuyagbaatar, B. Kindler, I. Kojouharov, J. V. Kratz, J. Krier, N. Kurz, B. Lommel, A. Mistry, C. Mokry, J. P. Omtvedt, P. Papadakis, J. Runke, K. Rykaczewski, M. Schädel, H. Schaffner, B. Schausten, P. Thörle-Pospiech, N. Trautmann, T. Torres, A. Türler, A. Ward, N. Wiehl, A. Yakushev

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Abstract

Short-lived α-decaying nuclei "northeast" of ²⁰⁸Pb in the chart of nuclides were studied using the reaction ⁴⁸Ca+²⁴³Am with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even ²²⁰Ra and its odd-A neighbors, ²¹⁹Fr, and ^219,221Ra, with a focus on the ²¹⁹Ra→²¹⁵Rn decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of ²¹⁹Ra is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.

Original language	English
Article number	044307
Number of pages	11
Journal	Physical Review C
Volume	98
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.98.044307
Publication status	Published - 2018 Oct 9

Subject classification (UKÄ)

Subatomic Physics

Free keywords

alpha decay
half life
gamma-ray spectroscopy
pulse shape analysis
nuclear shell model
Nilsson-Strutinsky calculations

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10.1103/PhysRevC.98.044307

PhysRevC.98.044307Final published version, 1.5 MB

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α decay of the neutron-deficient isotope ¹⁹⁰At
Andreyev, A. N., Seweryniak, D., Andel, B., Antalic, S., Doherty, D. T., Korichi, A., Barton, C., Canete, L., Carpenter, M. P., Clark, R. M., Copp, P. A., Cubiss, J. G., Heery, J., Hrabar, Y., Huang, H., Huang, T., Karayonchev, V., Kondev, F. G., Lauritsen, T., Lotay, G., & 12 othersMüller-Gatermann, C., Page, C., Potterveld, D. H., Regan, P. H., Reviol, W., Rudolph, D., Siciliano, M., Sidhu, R. S., Sitarčík, A., Woods, P. J., Yue, Z. & Zhang, W., 2023 Sept 1, In: Physical Review C. 108, 3, 4 p., 034303.
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Spectroscopy along Decay Chains of Element 114, Flerovium
Såmark-Roth, A., 2021, Lund: Lund University. 227 p.
Research output: Thesis › Doctoral Thesis (compilation)

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New Short-Lived Isotope 221U and the Mass Surface Near N=126
Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Ackermann, D., Andersson, L-L., Block, M., Brand, H., Cox, D. M., Even, J., Forsberg, U., Golubev, P., Hartmann, W., Herzberg, R-D., Heßberger, F. P., Hoffmann, J., Hübner, A., Jäger, E., Jeppsson, J., Kindler, B., Kratz, J. V., & 19 othersKrier, J., Kurz, N., Lommel, B., Maiti, M., Minami, S., Mistry, A. K., Mrosek, C. M., Pysmenetska, I., Rudolph, D., Sarmiento, L., Schaffner, H., Schädel, M., Schausten, B., Steiner, J., De Heidenreich, T. T., Uusitalo, J., Wegrzecki, M., Wiehl, N. & Yakusheva, V., 2015, In: Physical Review Letters. 115, 24, 4 p., 242502.
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ChaSE Lundium: Characterization of New Superheavy Elements
Rudolph, D., Åberg, S., Carlsson, G., Düllmann, C. E., Golubev, P., Sarmiento Pico, L., Forsberg, U., Toivanen, J., Ward, D., Cox, D., Lorenz, C., Såmark-Roth, A., Albertsson, M., Ljungberg, J., Hrabar, Y., Lindholm, Y., Lindqvist, K. & Lundberg, M.
Knut and Alice Wallenberg Foundation, The Nobel Foundation
2016/01/01 → 2023/12/31
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Nuclear Structure at the Limits: Isotope-selective Spectroscopy
Rudolph, D., Fahlander, C., Golubev, P., Sarmiento Pico, L., Cox, D., Hrabar, Y., Såmark-Roth, A., Forsberg, U., Lorenz, C., Lalovic, N., Lalovic, N., Forsberg, U., Gellanki, J., Hoischen, R., Johansson, E., Andersson, L., du Rietz, R., Ekman, J. & Andreoiu, C.
Swedish Research Council
2002/01/01 → 2027/12/31
Project: Research
Spectroscopy along Decay Chains of Element 114, Flerovium
Såmark-Roth, A., Rudolph, D. & Sarmiento Pico, L.
2016/12/01 → 2021/06/18
Project: Dissertation

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4 Presentation

Low-lying states in Ra-219 and Rn-215: sampling microsecond α-decaying nuclei
Anton Såmark-Roth (Speaker)
2018 Sept 25
Activity: Talk or presentation › Presentation
Low-lying states in Ra-219 and Rn-215: sampling microsecond α-decaying nuclei
Anton Såmark-Roth (Role not specified)
2018 May 9
Activity: Talk or presentation › Presentation
Sub-microsecond alpha particle emitters
Anton Såmark-Roth (Role not specified)
2017 Oct 10
Activity: Talk or presentation › Presentation

Cite this

Såmark-Roth, A., Sarmiento, L. G., Rudolph, D., Ljungberg, J., Carlsson, B. G., Fahlander, C., Forsberg, U., Golubev, P., Ragnarsson, I., Ackermann, D., Andersson, L. L., Block, M., Brand, H., Cox, D. M., Di Nitto, A., Düllmann, C. E., Eberhardt, K., Even, J., Gates, J. M., ... Yakushev, A. (2018). Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei. Physical Review C, 98(4), [044307]. https://doi.org/10.1103/PhysRevC.98.044307

@article{a0027d1f8ff342998fed8268676f57b5,

title = "Low-lying states in 219Ra and 215Rn: Sampling microsecond α-decaying nuclei",

abstract = "Short-lived α-decaying nuclei {"}northeast{"} of 208Pb in the chart of nuclides were studied using the reaction 48Ca+243Am with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even 220Ra and its odd-A neighbors, 219Fr, and 219,221Ra, with a focus on the 219Ra→215Rn decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of 219Ra is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.",

keywords = "alpha decay, half life, gamma-ray spectroscopy, pulse shape analysis, nuclear shell model, Nilsson-Strutinsky calculations",

author = "A. S{\aa}mark-Roth and Sarmiento, {L. G.} and D. Rudolph and J. Ljungberg and Carlsson, {B. G.} and C. Fahlander and U. Forsberg and P. Golubev and I. Ragnarsson and D. Ackermann and Andersson, {L. L.} and M. Block and H. Brand and Cox, {D. M.} and {Di Nitto}, A. and D{\"u}llmann, {Ch E.} and K. Eberhardt and J. Even and Gates, {J. M.} and J. Gerl and Gregorich, {K. E.} and Gross, {C. J.} and Herzberg, {R. D.} and He{\ss}berger, {F. P.} and E. J{\"a}ger and J. Khuyagbaatar and B. Kindler and I. Kojouharov and Kratz, {J. V.} and J. Krier and N. Kurz and B. Lommel and A. Mistry and C. Mokry and Omtvedt, {J. P.} and P. Papadakis and J. Runke and K. Rykaczewski and M. Sch{\"a}del and H. Schaffner and B. Schausten and P. Th{\"o}rle-Pospiech and N. Trautmann and T. Torres and A. T{\"u}rler and A. Ward and N. Wiehl and A. Yakushev",

year = "2018",

month = oct,

day = "9",

doi = "10.1103/PhysRevC.98.044307",

language = "English",

volume = "98",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

}

Såmark-Roth, A, Sarmiento, LG , Rudolph, D , Ljungberg, J , Carlsson, BG , Fahlander, C, Forsberg, U, Golubev, P , Ragnarsson, I, Ackermann, D, Andersson, LL, Block, M, Brand, H, Cox, DM, Di Nitto, A, Düllmann, CE, Eberhardt, K, Even, J, Gates, JM, Gerl, J, Gregorich, KE, Gross, CJ, Herzberg, RD, Heßberger, FP, Jäger, E, Khuyagbaatar, J, Kindler, B, Kojouharov, I, Kratz, JV, Krier, J, Kurz, N, Lommel, B, Mistry, A, Mokry, C, Omtvedt, JP, Papadakis, P, Runke, J, Rykaczewski, K, Schädel, M, Schaffner, H, Schausten, B, Thörle-Pospiech, P, Trautmann, N, Torres, T, Türler, A, Ward, A, Wiehl, N & Yakushev, A 2018, 'Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei', Physical Review C, vol. 98, no. 4, 044307. https://doi.org/10.1103/PhysRevC.98.044307

TY - JOUR

T1 - Low-lying states in 219Ra and 215Rn

T2 - Sampling microsecond α-decaying nuclei

AU - Såmark-Roth, A.

AU - Sarmiento, L. G.

AU - Rudolph, D.

AU - Ljungberg, J.

AU - Carlsson, B. G.

AU - Fahlander, C.

AU - Forsberg, U.

AU - Golubev, P.

AU - Ragnarsson, I.

AU - Ackermann, D.

AU - Andersson, L. L.

AU - Block, M.

AU - Brand, H.

AU - Cox, D. M.

AU - Di Nitto, A.

AU - Düllmann, Ch E.

AU - Eberhardt, K.

AU - Even, J.

AU - Gates, J. M.

AU - Gerl, J.

AU - Gregorich, K. E.

AU - Gross, C. J.

AU - Herzberg, R. D.

AU - Heßberger, F. P.

AU - Jäger, E.

AU - Khuyagbaatar, J.

AU - Kindler, B.

AU - Kojouharov, I.

AU - Kratz, J. V.

AU - Krier, J.

AU - Kurz, N.

AU - Lommel, B.

AU - Mistry, A.

AU - Mokry, C.

AU - Omtvedt, J. P.

AU - Papadakis, P.

AU - Runke, J.

AU - Rykaczewski, K.

AU - Schädel, M.

AU - Schaffner, H.

AU - Schausten, B.

AU - Thörle-Pospiech, P.

AU - Trautmann, N.

AU - Torres, T.

AU - Türler, A.

AU - Ward, A.

AU - Wiehl, N.

AU - Yakushev, A.

PY - 2018/10/9

Y1 - 2018/10/9

N2 - Short-lived α-decaying nuclei "northeast" of 208Pb in the chart of nuclides were studied using the reaction 48Ca+243Am with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even 220Ra and its odd-A neighbors, 219Fr, and 219,221Ra, with a focus on the 219Ra→215Rn decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of 219Ra is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.

AB - Short-lived α-decaying nuclei "northeast" of 208Pb in the chart of nuclides were studied using the reaction 48Ca+243Am with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even 220Ra and its odd-A neighbors, 219Fr, and 219,221Ra, with a focus on the 219Ra→215Rn decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of 219Ra is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.

KW - alpha decay

KW - half life

KW - gamma-ray spectroscopy

KW - pulse shape analysis

KW - nuclear shell model

KW - Nilsson-Strutinsky calculations

U2 - 10.1103/PhysRevC.98.044307

DO - 10.1103/PhysRevC.98.044307

M3 - Article

AN - SCOPUS:85054748434

SN - 2469-9985

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044307

ER -

Low-lying states in 219Ra and 215Rn: Sampling microsecond α-decaying nuclei

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Low-lying states in ²¹⁹Ra and ²¹⁵Rn: Sampling microsecond α-decaying nuclei