Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243

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

doi:10.1016/j.nuclphysa.2016.04.025

Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243

U. Forsberg
, D. Rudolph
, L. -L. Andersson
, A. Di Nitto
, Ch E. Düllmann
, J. M. Gates
, P. Golubev
, K. E. Gregorich
, C. J. Gross
, R. -D. Herzberg
, F. P. Hessberger
, J. Khuyagbaatar
, J. V. Kratz
, K. Rykaczewski
, L. G. Sarmiento
, M. Schädel
, A. Yakushev
, S. Åberg
, D. Ackermann
, M. Block

H. Brand, B. G. Carlsson, D. Cox, X. Derkx, J. Dobaczewski, K. Eberhardt, J. Even, C. Fahlander, J. Gerl, E. Jäger, B. Kindler, J. Krier, I. Kojouharov, N. Kurz, B. Lommel, A. Mistry, C. Mokry, W. Nazarewicz, H. Nitsche, J. P. Omtvedt, P. Papadakis, I. Ragnarsson, J. Runke, H. Schaffner, B. Schausten, Y. Shi, P. Thörle-Pospiech, T. Torres, T. Traut, N. Trautmann, A. Türler, A. Ward, D. E. Ward, N. Wiehl

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Abstract

Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.

Original language	English
Pages (from-to)	117-138
Number of pages	22
Journal	Nuclear Physics A
Volume	953
DOIs	https://doi.org/10.1016/j.nuclphysa.2016.04.025
Publication status	Published - 2016

Keywords

nucl-ex
Superheavy elements
Element 115
Uup
alpha decay
Spontaneous fission
115 DECAY CHAINS
SUPERHEAVY ELEMENTS
HEAVIEST ELEMENTS
NUCLEI
TASCA
HEAVY
SPECTROSCOPY
SIMULATION
SEPARATOR
CHEMISTRY

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1-s2.0-S0375947416300768-mainFinal publisher's version, 640 KBLicence: Taverne

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Forsberg, U., Rudolph, D., Andersson, L. .-L., Nitto, A. D., Düllmann, C. E., Gates, J. M., Golubev, P., Gregorich, K. E., Gross, C. J., Herzberg, R. .-D., Hessberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Sarmiento, L. G., Schädel, M., Yakushev, A., Åberg, S., Ackermann, D., ... Wiehl, N. (2016). Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243. Nuclear Physics A, 953, 117-138. https://doi.org/10.1016/j.nuclphysa.2016.04.025

@article{f2f8a59af1e04f73ae60a29aa807c47c,

title = "Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243",

abstract = "Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\textbackslash{}{"}ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.",

keywords = "nucl-ex, Superheavy elements, Element 115, Uup, alpha decay, Spontaneous fission, 115 DECAY CHAINS, SUPERHEAVY ELEMENTS, HEAVIEST ELEMENTS, NUCLEI, TASCA, HEAVY, SPECTROSCOPY, SIMULATION, SEPARATOR, CHEMISTRY",

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

note = "15 pages. Article: 9 pages, 3 tables, 3 figures. Supplemental material: 6 pages, 7 tables, 1 figure. Submitted to PRC",

year = "2016",

doi = "10.1016/j.nuclphysa.2016.04.025",

language = "English",

volume = "953",

pages = "117--138",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "ELSEVIER SCIENCE BV",

}

Forsberg, U, Rudolph, D, Andersson, L-L, Nitto, AD, Düllmann, CE, Gates, JM, Golubev, P, Gregorich, KE, Gross, CJ, Herzberg, R-D, Hessberger, FP, Khuyagbaatar, J, Kratz, JV, Rykaczewski, K, Sarmiento, LG, Schädel, M, Yakushev, A, Åberg, S, Ackermann, D, Block, M, Brand, H, Carlsson, BG, Cox, D, Derkx, X, Dobaczewski, J, Eberhardt, K, Even, J, Fahlander, C, Gerl, J, Jäger, E, Kindler, B, Krier, J, Kojouharov, I, Kurz, N, Lommel, B, Mistry, A, Mokry, C, Nazarewicz, W, Nitsche, H, Omtvedt, JP, Papadakis, P, Ragnarsson, I, Runke, J, Schaffner, H, Schausten, B, Shi, Y, Thörle-Pospiech, P, Torres, T, Traut, T, Trautmann, N, Türler, A, Ward, A, Ward, DE & Wiehl, N 2016, 'Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243', Nuclear Physics A, vol. 953, pp. 117-138. https://doi.org/10.1016/j.nuclphysa.2016.04.025

TY - JOUR

T1 - Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243

AU - Forsberg, U.

AU - Rudolph, D.

AU - Andersson, L. -L.

AU - Nitto, A. Di

AU - Düllmann, Ch E.

AU - Gates, J. M.

AU - Golubev, P.

AU - Gregorich, K. E.

AU - Gross, C. J.

AU - Herzberg, R. -D.

AU - Hessberger, F. P.

AU - Khuyagbaatar, J.

AU - Kratz, J. V.

AU - Rykaczewski, K.

AU - Sarmiento, L. G.

AU - Schädel, M.

AU - Yakushev, A.

AU - Åberg, S.

AU - Ackermann, D.

AU - Block, M.

AU - Brand, H.

AU - Carlsson, B. G.

AU - Cox, D.

AU - Derkx, X.

AU - Dobaczewski, J.

AU - Eberhardt, K.

AU - Even, J.

AU - Fahlander, C.

AU - Gerl, J.

AU - Jäger, E.

AU - Kindler, B.

AU - Krier, J.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Lommel, B.

AU - Mistry, A.

AU - Mokry, C.

AU - Nazarewicz, W.

AU - Nitsche, H.

AU - Omtvedt, J. P.

AU - Papadakis, P.

AU - Ragnarsson, I.

AU - Runke, J.

AU - Schaffner, H.

AU - Schausten, B.

AU - Shi, Y.

AU - Thörle-Pospiech, P.

AU - Torres, T.

AU - Traut, T.

AU - Trautmann, N.

AU - Türler, A.

AU - Ward, A.

AU - Ward, D. E.

AU - Wiehl, N.

N1 - 15 pages. Article: 9 pages, 3 tables, 3 figures. Supplemental material: 6 pages, 7 tables, 1 figure. Submitted to PRC

PY - 2016

Y1 - 2016

N2 - Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.

AB - Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289.

KW - nucl-ex

KW - Superheavy elements

KW - Element 115

KW - Uup

KW - alpha decay

KW - Spontaneous fission

KW - 115 DECAY CHAINS

KW - SUPERHEAVY ELEMENTS

KW - HEAVIEST ELEMENTS

KW - NUCLEI

KW - TASCA

KW - HEAVY

KW - SPECTROSCOPY

KW - SIMULATION

KW - SEPARATOR

KW - CHEMISTRY

U2 - 10.1016/j.nuclphysa.2016.04.025

DO - 10.1016/j.nuclphysa.2016.04.025

M3 - Article

SN - 0375-9474

VL - 953

SP - 117

EP - 138

JO - Nuclear Physics A

JF - Nuclear Physics A

ER -

Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48 + Am-243

Abstract

Keywords

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