Samark-Roth, A., Cox, D. M., Rudolph, D., Sarmiento, L. G., Carlsson, B. G., Egido, J. L., Golubev, P., Heery, J., Yakushev, A., Aberg, S., Albers, H. M., Albertsson, M., Block, M., Brand, H., Calverley, T., Cantemir, R., Clark, R. M., Duellmann, Ch E., Eberth, J., Fahlander, C., Forsberg, U., Gates, J. M., Giacoppo, F., Goetz, M., Goetz, S., Herzberg, R-D, Hrabar, Y., Jaeger, E., Judson, D., Khuyagbaatar, J., Kindler, B., Kojouharov, I, Kratz, J., V, Krier, J., Kurz, N., Lens, L., Ljungberg, J., Lommel, B., Louko, J., Meyer, C-C, Mistry, A., Mokry, C., Papadakis, P., Parr, E., Pore, J. L., Ragnarsson, I, Runke, J., Schaedel, M., Schaffner, H., Schausten, B., Shaughnessy, D. A., Thoerle-Pospiech, P., Trautmann, N. and Uusitalo, J. (2021). Spectroscopy along Flerovium Decay Chains: Discovery of (280)Ds and an Excited State in (282)Cn. Phys. Rev. Lett., 126 (3). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

A nuclear spectroscopy experiment was conducted to study a-decay chains stemming from isotopes of flerovium (clement Z = 114). An upgraded TASISpec decay station was placed behind the gas-filled separator TASCA at the GSI Helmholtzzentrum fiir Schwerionenforschung in Darmstadt, Germany. The fusion-evaporation reactions 48(Ca) + 242(pu) and 48(Ca) + 244(Pu) provided a total of 32 flerovium-candidate decay chains, of which two and eleven were firmly assigned to H-286 and (288)Fl, respectively. A prompt coincidence between a 9.60(1)-MeV alpha particle event and a 0.36(1)-MeV conversion electron marked the first observation of an excited state in an even-even isotope of the heaviest man-made elements, namely 282 Cn. Spectroscopy of 288 F1 decay chains fixed Q(alpha) = 10.06(1) MeV. In one case, a Q(alpha) = 9.46(1)-MeV decay from 284 01 into 280 Ds was observed, with (280)Ds fissioning after only 518 its. The impact of these findings, aggregated with existing data on decay chains of (286,288)Fl, on the size of an anticipated shell gap at proton number Z = 114 is discussed in light of predictions from two beyond-mean-field calculations, which take into account triaxial deformation.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Samark-Roth, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cox, D. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rudolph, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sarmiento, L. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carlsson, B. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Egido, J. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Golubev, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heery, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yakushev, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aberg, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albers, H. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albertsson, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Block, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brand, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Calverley, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cantemir, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Clark, R. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duellmann, Ch E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eberth, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fahlander, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Forsberg, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gates, J. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giacoppo, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goetz, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goetz, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herzberg, R-DUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hrabar, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jaeger, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Judson, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Khuyagbaatar, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kindler, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kojouharov, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kratz, J., VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krier, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kurz, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lens, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ljungberg, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lommel, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Louko, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meyer, C-CUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mistry, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mokry, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Papadakis, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parr, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pore, J. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ragnarsson, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Runke, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schaedel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schaffner, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schausten, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shaughnessy, D. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Thoerle-Pospiech, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trautmann, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Uusitalo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-602927
DOI: 10.1103/PhysRevLett.126.032503
Journal or Publication Title: Phys. Rev. Lett.
Volume: 126
Number: 3
Date: 2021
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CONVERSION; ELEMENTS; TASCA; EVENTS; NUCLEI; REGION; SHAPES; GSIMultiple languages
Physics, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60292

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