Low-lying states in Ra-219 and Rn-215: 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. 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. 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; N. Trautmann; T. Torres; A. Türler; A. Ward; N. Wiehl; A. Yakushev

doi:10.1103/PhysRevC.98.044307

Low-lying states in Ra-219 and Rn-215: 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. 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. 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, N. Trautmann, T. Torres, A. Türler, A. Ward, N. Wiehl, A. Yakushev

Research output: Contribution to journal › Article › Academic › peer-review

11 Citations (Scopus)

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 221,219Ra, 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 - 9-Oct-2018
Externally published	Yes

Keywords

ATOMIC-NUCLEI
GROUND-STATE
SPECTROSCOPY
MODEL
PARAMETRIZATION
CHEMISTRY
CHAINS
TASCA
SPIN
MASS

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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., Block, M., Brand, H., Cox, D. M., Nitto, A. D., Düllmann, C. E., Eberhardt, K., Even, J., Gates, J. M., ... Yakushev, A. (2018). Low-lying states in Ra-219 and Rn-215: Sampling microsecond α -decaying nuclei. Physical Review C, 98(4), Article 044307. https://doi.org/10.1103/PhysRevC.98.044307

@article{6d1b42b02a414c709f1f36fb9dd0b478,

title = "Low-lying states in Ra-219 and Rn-215: 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 221,219Ra, 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 = "ATOMIC-NUCLEI, GROUND-STATE, SPECTROSCOPY, MODEL, PARAMETRIZATION, CHEMISTRY, CHAINS, TASCA, SPIN, MASS",

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 L. Andersson and M. Block and H. Brand and Cox, {D. M.} and Nitto, {A. Di} 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 R. Herzberg 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 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 = "0556-2813",

publisher = "AMER PHYSICAL SOC",

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Såmark-Roth, A, Sarmiento, LG, Rudolph, D, Ljungberg, J, Carlsson, BG, Fahlander, C, Forsberg, U, Golubev, P, Ragnarsson, I, Ackermann, D, Andersson, L, Block, M, Brand, H, Cox, DM, Nitto, AD, Düllmann, CE, Eberhardt, K, Even, J, Gates, JM, Gerl, J, Gregorich, KE, Gross, CJ, Herzberg, R, 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, Trautmann, N, Torres, T, Türler, A, Ward, A, Wiehl, N & Yakushev, A 2018, 'Low-lying states in Ra-219 and Rn-215: 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 Ra-219 and Rn-215

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.

AU - Block, M.

AU - Brand, H.

AU - Cox, D. M.

AU - Nitto, A. Di

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.

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 - 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 221,219Ra, 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 221,219Ra, 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 - ATOMIC-NUCLEI

KW - GROUND-STATE

KW - SPECTROSCOPY

KW - MODEL

KW - PARAMETRIZATION

KW - CHEMISTRY

KW - CHAINS

KW - TASCA

KW - SPIN

KW - MASS

UR - https://www.mendeley.com/catalogue/6ecee491-7de5-3bf6-bc15-c4a2bc752c59/

U2 - 10.1103/PhysRevC.98.044307

DO - 10.1103/PhysRevC.98.044307

M3 - Article

SN - 0556-2813

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044307

ER -

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

Abstract

Keywords

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