Production and Decay of Element 114: High Cross Sections and the New Nucleus <sup>277</sup>Hs

Düllmann, Ch. E.; Schädel, M.; Yakushev, A.; Türler, A.; Eberhardt, K.; Kratz, J. V.; Ackermann, D.; Andersson, L. -L.; Block, M.; Brüchle, W.; Dvorak, J.; Essel, H. G.; Ellison, P. A.; Even, J.; Gates, J. M.; Gorshkov, A.; Graeger, R.; Gregorich, K. E.; Hartmann, W.; Herzberg, R. -D.; Heßberger, F. P.; Hild, D.; Huebner, A.; Jäger, E.; Khuyagbaatar, J.; Kindler, B.; Krier, J.; Kurz, N.; Lahiri, S.; Liebe, D.; Lommel, B.; Maiti, M.; Nitsche, H.; Omtvedt, J. P.; Parr, E.; Rudolph, Dirk; Runke, J.; Schausten, B.; Schimpf, E.; Semchenkov, A.; Steiner, J.; Thörle-Pospiech, P.; Uusitalo, J.; Wegrzecki, M.; Wiehl, N.

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

Mark

Düllmann, Ch. E. ; Schädel, M. ; Yakushev, A. ; Türler, A. ; Eberhardt, K. ; Kratz, J. V. ; Ackermann, D. ; Andersson, L. -L. ; Block, M. and Brüchle, W. , et al. (2010) In Physical Review Letters 104(25).

Abstract: The fusion-evaporation reaction ²⁴⁴Pu(⁴⁸Ca, 3-4n)^288,289114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of ^288,289114. 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 ²⁸¹Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus ²⁷⁷Hs, which decayed by... (More); The fusion-evaporation reaction ²⁴⁴Pu(⁴⁸Ca, 3-4n)^288,289114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of ^288,289114. 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 ²⁸¹Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus ²⁷⁷Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms. (Less)

Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/1629889

author

Düllmann, Ch. E. ; Schädel, M. ; Yakushev, A. ; Türler, A. ; Eberhardt, K. ; Kratz, J. V. ; Ackermann, D. ; Andersson, L. -L. ; Block, M. and Brüchle, W. , et al. (More)

Düllmann, Ch. E. ; Schädel, M. ; Yakushev, A. ; Türler, A. ; Eberhardt, K. ; Kratz, J. V. ; Ackermann, D. ; Andersson, L. -L. ; Block, M. ; Brüchle, W. ; Dvorak, J. ; Essel, H. G. ; Ellison, P. A. ; Even, J. ; Gates, J. M. ; Gorshkov, A. ; Graeger, R. ; Gregorich, K. E. ; Hartmann, W. ; Herzberg, R. -D. ; Heßberger, F. P. ; Hild, D. ; Huebner, A. ; Jäger, E. ; Khuyagbaatar, J. ; Kindler, B. ; Krier, J. ; Kurz, N. ; Lahiri, S. ; Liebe, D. ; Lommel, B. ; Maiti, M. ; Nitsche, H. ; Omtvedt, J. P. ; Parr, E. ; Rudolph, Dirk ^LU

; Runke, J. ; Schausten, B. ; Schimpf, E. ; Semchenkov, A. ; Steiner, J. ; Thörle-Pospiech, P. ; Uusitalo, J. ; Wegrzecki, M. and Wiehl, N. (Less)

organization

publishing date

2010

type

Contribution to journal

publication status

published

subject

Subatomic Physics

in

Physical Review Letters

volume

104

issue

25

article number

252701

pages

5 pages

publisher

American Physical Society

external identifiers

wos:000279037400001
scopus:77953775504
pmid:20867370

ISSN

1079-7114

DOI

10.1103/PhysRevLett.104.252701

language

English

LU publication?

yes

id

f65c219f-f4c8-46cf-81d8-4c7411d6f85d (old id 1629889)

date added to LUP

2016-04-01 10:13:23

date last changed

2022-04-12 03:13:02

@article{f65c219f-f4c8-46cf-81d8-4c7411d6f85d,
  abstract     = {{The fusion-evaporation reaction <sup>244</sup>Pu(<sup>48</sup>Ca, 3-4n)<sup>288,289</sup>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 <sup>288,289</sup>114. At a compound nucleus excitation energy of <i>E</i>* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At <i>E</i>* = 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 <sup>281</sup>Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus <sup>277</sup>Hs, which decayed by spontaneous fission after a lifetime of 4.5 ms.}},
  author       = {{Düllmann, Ch. E. and Schädel, M. and Yakushev, A. and Türler, A. and Eberhardt, K. and Kratz, J. V. and Ackermann, D. and Andersson, L. -L. and Block, M. and Brüchle, W. and Dvorak, J. and Essel, H. G. and Ellison, P. A. and Even, J. and Gates, J. M. and Gorshkov, A. and Graeger, R. and Gregorich, K. E. and Hartmann, W. and Herzberg, R. -D. and Heßberger, F. P. and Hild, D. and Huebner, A. and Jäger, E. and Khuyagbaatar, J. and Kindler, B. and Krier, J. and Kurz, N. and Lahiri, S. and Liebe, D. and Lommel, B. and Maiti, M. and Nitsche, H. and Omtvedt, J. P. and Parr, E. and Rudolph, Dirk and Runke, J. and Schausten, B. and Schimpf, E. and Semchenkov, A. and Steiner, J. and Thörle-Pospiech, P. and Uusitalo, J. and Wegrzecki, M. and Wiehl, N.}},
  issn         = {{1079-7114}},
  language     = {{eng}},
  number       = {{25}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Production and Decay of Element 114: High Cross Sections and the New Nucleus <sup>277</sup>Hs}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.104.252701}},
  doi          = {{10.1103/PhysRevLett.104.252701}},
  volume       = {{104}},
  year         = {{2010}},
}

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