Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs

Ch. E. Duellmann; M. Schaedel; A. Yakushev; A. Tuerler; K. Eberhardt; J. V. Kratz; D. Ackermann; L. -L. Andersson; M. Block; W. Bruechle; J. Dvorak; H. G. Essel; P. A. Ellison; J. Even; J. M. Gates; A. Gorshkov; R. Graeger; K. E. Gregorich; W. Hartmann; R. -D. Herzberg; F. P. Hessberger; D. Hild; A. Huebner; E. Jaeger; J. Khuyagbaatar; B. Kindler; J. Krier; N. Kurz; S. Lahiri; D. Liebe; B. Lommel; M. Maiti; H. Nitsche; J. P. Omtvedt; E. Parr; D. Rudolph; J. Runke; B. Schausten; E. Schimpf; A. Semchenkov; J. Steiner; P. Thoerle-Pospiech; J. Uusitalo; M. Wegrzecki; N. Wiehl

doi:10.1103/PhysRevLett.104.252701

Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs

Ch. E. Duellmann^*
, M. Schaedel
, A. Yakushev
, A. Tuerler
, K. Eberhardt
, J. V. Kratz
, D. Ackermann
, L. -L. Andersson
, M. Block
, W. Bruechle
, J. Dvorak
, H. G. Essel
, P. A. Ellison
, J. Even
, J. M. Gates
, A. Gorshkov
, R. Graeger
, K. E. Gregorich
, W. Hartmann
, R. -D. Herzberg

F. P. Hessberger, D. Hild, A. Huebner, E. Jaeger, J. Khuyagbaatar, B. Kindler, J. Krier, N. Kurz, S. Lahiri, D. Liebe, B. Lommel, M. Maiti, H. Nitsche, J. P. Omtvedt, E. Parr, D. Rudolph, J. Runke, B. Schausten, E. Schimpf, A. Semchenkov, J. Steiner, P. Thoerle-Pospiech, J. Uusitalo, M. Wegrzecki, N. Wiehl

^*Corresponding author for this work

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

245 Citations (Scopus)

Abstract

The fusion-evaporation reaction Pu-244(Ca-48, 3-4n)(288,289)114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of (288, 289)114. At a compound nucleus excitation energy of E* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At E* = 36.1-39.5 MeV, that of the 3n evaporation channel was 8.0-(+7.4)(4.5) pb. In one of the 3n evaporation channel decay chains, a previously unobserved alpha branch in (281)Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus (277)Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.

Original language	English
Article number	252701
Number of pages	5
Journal	Physical Review Letters
Volume	104
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.104.252701
Publication status	Published - 21-Jun-2010
Externally published	Yes

Keywords

SUPERHEAVY NUCLEI
HEAVIEST NUCLEI
HALF-LIVES
GSI
CHEMISTRY

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Duellmann, C. E., Schaedel, M., Yakushev, A., Tuerler, A., Eberhardt, K., Kratz, J. V., Ackermann, D., Andersson, L. .-L., Block, M., Bruechle, W., Dvorak, J., Essel, H. G., Ellison, P. A., Even, J., Gates, J. M., Gorshkov, A., Graeger, R., Gregorich, K. E., Hartmann, W., ... Wiehl, N. (2010). Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs. Physical Review Letters, 104(25), Article 252701. https://doi.org/10.1103/PhysRevLett.104.252701

@article{97a620482f1b4f54a80a81f64ff52fca,

title = "Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs",

abstract = "The fusion-evaporation reaction Pu-244(Ca-48, 3-4n)(288,289)114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of (288, 289)114. At a compound nucleus excitation energy of E* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At E* = 36.1-39.5 MeV, that of the 3n evaporation channel was 8.0-(+7.4)(4.5) pb. In one of the 3n evaporation channel decay chains, a previously unobserved alpha branch in (281)Ds was observed ( probability to be of random origin from background: 0.1\%). This alpha decay populated the new nucleus (277)Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.",

keywords = "SUPERHEAVY NUCLEI, HEAVIEST NUCLEI, HALF-LIVES, GSI, CHEMISTRY",

author = "Duellmann, \{Ch. E.\} and M. Schaedel and A. Yakushev and A. Tuerler and K. Eberhardt and Kratz, \{J. V.\} and D. Ackermann and Andersson, \{L. -L.\} and M. Block and W. Bruechle and J. Dvorak and Essel, \{H. G.\} and Ellison, \{P. A.\} and J. Even and Gates, \{J. M.\} and A. Gorshkov and R. Graeger and Gregorich, \{K. E.\} and W. Hartmann and Herzberg, \{R. -D.\} and Hessberger, \{F. P.\} and D. Hild and A. Huebner and E. Jaeger and J. Khuyagbaatar and B. Kindler and J. Krier and N. Kurz and S. Lahiri and D. Liebe and B. Lommel and M. Maiti and H. Nitsche and Omtvedt, \{J. P.\} and E. Parr and D. Rudolph and J. Runke and B. Schausten and E. Schimpf and A. Semchenkov and J. Steiner and P. Thoerle-Pospiech and J. Uusitalo and M. Wegrzecki and N. Wiehl",

year = "2010",

month = jun,

day = "21",

doi = "10.1103/PhysRevLett.104.252701",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "AMER PHYSICAL SOC",

number = "25",

}

Duellmann, CE, Schaedel, M, Yakushev, A, Tuerler, A, Eberhardt, K, Kratz, JV, Ackermann, D, Andersson, L-L, Block, M, Bruechle, W, Dvorak, J, Essel, HG, Ellison, PA, Even, J, Gates, JM, Gorshkov, A, Graeger, R, Gregorich, KE, Hartmann, W, Herzberg, R-D, Hessberger, FP, Hild, D, Huebner, A, Jaeger, E, Khuyagbaatar, J, Kindler, B, Krier, J, Kurz, N, Lahiri, S, Liebe, D, Lommel, B, Maiti, M, Nitsche, H, Omtvedt, JP, Parr, E, Rudolph, D, Runke, J, Schausten, B, Schimpf, E, Semchenkov, A, Steiner, J, Thoerle-Pospiech, P, Uusitalo, J, Wegrzecki, M & Wiehl, N 2010, 'Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs', Physical Review Letters, vol. 104, no. 25, 252701. https://doi.org/10.1103/PhysRevLett.104.252701

TY - JOUR

T1 - Production and Decay of Element 114

T2 - High Cross Sections and the New Nucleus (277)Hs

AU - Duellmann, Ch. E.

AU - Schaedel, M.

AU - Yakushev, A.

AU - Tuerler, A.

AU - Eberhardt, K.

AU - Kratz, J. V.

AU - Ackermann, D.

AU - Andersson, L. -L.

AU - Block, M.

AU - Bruechle, W.

AU - Dvorak, J.

AU - Essel, H. G.

AU - Ellison, P. A.

AU - Even, J.

AU - Gates, J. M.

AU - Gorshkov, A.

AU - Graeger, R.

AU - Gregorich, K. E.

AU - Hartmann, W.

AU - Herzberg, R. -D.

AU - Hessberger, F. P.

AU - Hild, D.

AU - Huebner, A.

AU - Jaeger, E.

AU - Khuyagbaatar, J.

AU - Kindler, B.

AU - Krier, J.

AU - Kurz, N.

AU - Lahiri, S.

AU - Liebe, D.

AU - Lommel, B.

AU - Maiti, M.

AU - Nitsche, H.

AU - Omtvedt, J. P.

AU - Parr, E.

AU - Rudolph, D.

AU - Runke, J.

AU - Schausten, B.

AU - Schimpf, E.

AU - Semchenkov, A.

AU - Steiner, J.

AU - Thoerle-Pospiech, P.

AU - Uusitalo, J.

AU - Wegrzecki, M.

AU - Wiehl, N.

PY - 2010/6/21

Y1 - 2010/6/21

N2 - The fusion-evaporation reaction Pu-244(Ca-48, 3-4n)(288,289)114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of (288, 289)114. At a compound nucleus excitation energy of E* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At E* = 36.1-39.5 MeV, that of the 3n evaporation channel was 8.0-(+7.4)(4.5) pb. In one of the 3n evaporation channel decay chains, a previously unobserved alpha branch in (281)Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus (277)Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.

AB - The fusion-evaporation reaction Pu-244(Ca-48, 3-4n)(288,289)114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of (288, 289)114. At a compound nucleus excitation energy of E* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At E* = 36.1-39.5 MeV, that of the 3n evaporation channel was 8.0-(+7.4)(4.5) pb. In one of the 3n evaporation channel decay chains, a previously unobserved alpha branch in (281)Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus (277)Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.

KW - SUPERHEAVY NUCLEI

KW - HEAVIEST NUCLEI

KW - HALF-LIVES

KW - GSI

KW - CHEMISTRY

U2 - 10.1103/PhysRevLett.104.252701

DO - 10.1103/PhysRevLett.104.252701

M3 - Article

SN - 0031-9007

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 252701

ER -

Production and Decay of Element 114: High Cross Sections and the New Nucleus (277)Hs

Abstract

Keywords

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