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

U. Forsberg; D. Rudolph; L. L. Andersson; A. Di Nitto; Ch E. Düllmann; C. Fahlander; 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; Sven Åberg; D. Ackermann; M. Block; H. Brand; Gillis Carlsson; D. Cox; X. Derkx; J. Dobaczewski; K. Eberhardt; J. Even; 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; Yue 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-α-fission and recoil-α-α-fission events observed in the reaction ⁴⁸Ca + ²⁴³Am

U. Forsberg, D. Rudolph, L. L. Andersson, A. Di Nitto, Ch E. Düllmann, C. Fahlander, 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, Sven Åberg, D. AckermannM. Block, H. Brand, Gillis Carlsson, D. Cox, X. Derkx, J. Dobaczewski, K. Eberhardt, J. Even, 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, Yue Shi, P. Thörle-Pospiech, T. Torres, T. Traut, N. Trautmann, A. Türler, A. Ward, D. E. Ward, N. Wiehl

Mathematical Physics

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

Abstract

Products of the fusion-evaporation reaction ⁴⁸Ca + ²⁴³Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α-α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel ²⁸⁹115 due to the fact that these recoil-α-α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α-α-fission decay chains, as well as some of the recoil-α-α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel ²⁸⁸115.

Original language	English
Pages (from-to)	117-138
Number of pages	22
Journal	Nuclear Physics, Section A
Volume	953
Early online date	2016 May
DOIs	https://doi.org/10.1016/j.nuclphysa.2016.04.025
Publication status	Published - 2016 Sept 1

Subject classification (UKÄ)

Subatomic Physics
Natural Sciences

Free keywords

Element 115
Spontaneous fission
Superheavy elements
Uup
α decay

Access to Document

10.1016/j.nuclphysa.2016.04.025

Cite this

Forsberg, U., Rudolph, D., Andersson, L. L., Di Nitto, A., Düllmann, C. E., Fahlander, C., 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., ... Wiehl, N. (2016). Recoil-α-fission and recoil-α-α-fission events observed in the reaction ⁴⁸Ca + ²⁴³Am. Nuclear Physics, Section A, 953, 117-138. https://doi.org/10.1016/j.nuclphysa.2016.04.025

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

abstract = "Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f{\"u}r Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α-α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289115 due to the fact that these recoil-α-α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α-α-fission decay chains, as well as some of the recoil-α-α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288115.",

keywords = "Element 115, Spontaneous fission, Superheavy elements, Uup, α decay",

author = "U. Forsberg and D. Rudolph and Andersson, {L. L.} and {Di Nitto}, A. and D{\"u}llmann, {Ch E.} and C. Fahlander and Gates, {J. M.} and P. Golubev and Gregorich, {K. E.} and Gross, {C. J.} and Herzberg, {R. D.} and He{\ss}berger, {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 Sven {\AA}berg and D. Ackermann and M. Block and H. Brand and Gillis Carlsson and D. Cox and X. Derkx and J. Dobaczewski and K. Eberhardt and J. Even 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 Yue 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",

year = "2016",

month = sep,

day = "1",

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

language = "English",

volume = "953",

pages = "117--138",

journal = "Nuclear Physics, Section A",

issn = "0375-9474",

publisher = "Elsevier",

}

Forsberg, U, Rudolph, D, Andersson, LL, Di Nitto, A, Düllmann, CE, Fahlander, C, Gates, JM, Golubev, P, Gregorich, KE, Gross, CJ, Herzberg, RD, Heßberger, FP, Khuyagbaatar, J, Kratz, JV, Rykaczewski, K, Sarmiento, LG, Schädel, M, Yakushev, A, Åberg, S, Ackermann, D, Block, M, Brand, H, Carlsson, G, Cox, D, Derkx, X, Dobaczewski, J, Eberhardt, K, Even, J, 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-α-fission and recoil-α-α-fission events observed in the reaction ⁴⁸Ca + ²⁴³Am', Nuclear Physics, Section A, vol. 953, pp. 117-138. https://doi.org/10.1016/j.nuclphysa.2016.04.025

TY - JOUR

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

AU - Forsberg, U.

AU - Rudolph, D.

AU - Andersson, L. L.

AU - Di Nitto, A.

AU - Düllmann, Ch E.

AU - Fahlander, C.

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, Sven

AU - Ackermann, D.

AU - Block, M.

AU - Brand, H.

AU - Carlsson, Gillis

AU - Cox, D.

AU - Derkx, X.

AU - Dobaczewski, J.

AU - Eberhardt, K.

AU - Even, J.

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, Yue

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.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α-α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289115 due to the fact that these recoil-α-α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α-α-fission decay chains, as well as some of the recoil-α-α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288115.

AB - Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α-α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289115 due to the fact that these recoil-α-α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α-α-fission decay chains, as well as some of the recoil-α-α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288115.

KW - Element 115

KW - Spontaneous fission

KW - Superheavy elements

KW - Uup

KW - α decay

UR - http://www.scopus.com/inward/record.url?scp=84965126643&partnerID=8YFLogxK

U2 - 10.1016/j.nuclphysa.2016.04.025

DO - 10.1016/j.nuclphysa.2016.04.025

M3 - Article

AN - SCOPUS:84965126643

SN - 0375-9474

VL - 953

SP - 117

EP - 138

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

ER -

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

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Role of quasiparticle structure in α decay of superheavy nuclei

Results and plans for nuclear spectroscopy of superheavy nuclei: the Lund perspective

Congruence of decay chains of elements 113, 115, and 117

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Element 115

Nuclear Spectroscopy of Superheavy Nuclei

Cite this

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

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Research output

Role of quasiparticle structure in α decay of superheavy nuclei

Results and plans for nuclear spectroscopy of superheavy nuclei: the Lund perspective

Congruence of decay chains of elements 113, 115, and 117

Projects

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Element 115

Activities

Nuclear Spectroscopy of Superheavy Nuclei

Cite this

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