Levels in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">Th</mml:mi><mml:mprescripts /><mml:none /><mml:mn>223</mml:mn></mml:mmultiscripts></mml:math>populated by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math>decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">U</mml:mi><mml:mprescripts /><mml:none /><mml:mn>227</mml:mn></mml:mmultiscripts></mml:math>

Kalaninová, Z.; Antalic, S.; Heßberger, F. P.; Ackermann, D.; Andel, B.; Kindler, B.; Laatiaoui, M.; Lommel, B.; Maurer, J.

doi:10.1103/physrevc.92.014321

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…The α-decay energies (and half-lives) were found to be in agreement with those measured in Ref. [15] E lit α = 6864(3) keV, and E lit α = 6743(4) keV, here E α = 6869 (25) keV and E α = 6742(25) keV. One additional α decay was observed at an energy of E α = 7008 (25) keV which is a result of α-CE summing (also observed in the aforementioned study).…”

Section: Pu U and Np Isotopessupporting

confidence: 87%

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Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

Mistry¹,

Zhang²,

Heßberger³

et al. 2018

Acta Phys. Pol. B

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The new COMPASS detection system designed and developed at GSI, Darmstadt was employed in the focal plane of the SHIP velocity filter online during a period of commissioning. The isotope 254 No was initially measured for control purposes, following which the nuclei, 227,228,230 U, 229 Np, and 229,230 Pu were synthesized. The obtained data from α-decay spectroscopy is evaluated and compared with previous measurements.

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Section: Pu U and Np Isotopessupporting

confidence: 87%

“…The decay of 227 U was reported in Ref. [15] which aimed to measure the excited levels in 223 Th following the α decay of 227 U. In the study discussed in this report, 5 chains could be assigned to the decay of 227 U (with one escaping event).…”

Section: Pu U and Np Isotopesmentioning

confidence: 85%

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

Mistry¹,

Zhang²,

Heßberger³

et al. 2018

Acta Phys. Pol. B

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“…Therefore, it is interesting to have a closer look and see if MNT reactions might be after all the better alternative to populate the still quite empty neutron-deficient transuranium region. Figure 25 compares measured fusion residue cross-sections of various uranium isotopes [253][254][255][256][257][258][259] with the MNT cross-sections measured at SHIP [243]. Figure 25 can be regarded as a representative example because the behavior is very similar for other elements in the uranium region.…”

Section: New Experimental Approaches and Resultsmentioning

confidence: 99%

“…If cross-sections from Fig. 25 The product of cross-section and experimental efficiency, σ ε, for uranium isotopes measured in fusion-evaporation reactions [253][254][255][256][257][258][259] (crosses) and in MNT reactions in 48 Ca + 248 Cm [243] (open circles). For 219 U a small offset on the A value is put to avoid an overlap of the data points from complete fusion and MNT more than one experiment were available for the same isotope, we put the largest known value.…”

Section: New Experimental Approaches and Resultsmentioning

confidence: 99%

How to extend the chart of nuclides?

et al. 2020

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In the past 85 years the number of known nuclides increased by more than a factor of ten, resulting in 4000 presently known isotopes of 118 elements. This considerable progress we owe to the discovery of new reaction types along with the development of powerful accelerators and experimental techniques for separation and identification of reaction products. Model predictions indicate that still about 4000 further nuclides are waiting for their discovery. The vastest unexplored territory is located on the neutron-rich side in the upper half of the chart of nuclides and hides the answers to some of the most fundamental questions of nuclear physics like the limits of nuclear stability, element synthesis in the universe or stellar evolution. The access to these nuclei is presently limited by available beam intensities and/or the lack of appropriate methods for their production and identification. The latter concerns particularly new neutron-rich isotopes of transuranium and superheavy elements. To extend this area, the hope is presently based on multinucleon transfer reactions and on the application of fusion reactions with radioactive ion beams. But how promising are these approaches? Based on a survey of present-day knowledge, we will treat the questions where we currently are on our journey towards new territory on the chart of nuclides, how the chances are to gain new territory in the future and which challenges we will have to face.

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“…We can also notice more recent measurements of low-spin states populated by α decay of 227 U [21,22]. Since the work presented in Ref.…”

Section: -3mentioning

confidence: 94%

Backbending in the pear-shaped Th90223 nucleus: Evidence of a high-spin octupole to quadrupole shape transition in the actinides

Maquart¹,

Augey²,

Chaix³

et al. 2017

Phys. Rev. C

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Relatively neutron-rich thorium isotopes lie at the heart of a nuclear region of nuclei exhibiting octupole correlation effects. The detailed level structure of 223 Th has been investigated in measurements of γ radiation following the fusion-evaporation channel of the 208 Pb( 18 O ,3n) 223 Th reaction at 85 MeV beam energy. The level structure has been extended up to spin 49/2, and 33 new γ rays have been added using triple-γ coincidence data. The spins and parities of the newly observed states have been confirmed by angular distribution ratios. In addition to the two known yrast bands based on a K = 5/2 configuration, a non-yrast band has been established up to spin 35/2. We interpret this new structure as based on the same configuration as the yrast band in 221 Th having dominant K = 1/2 contribution. At the highest spin a backbending occurs around a rotational frequency ofhω = 0.23 MeV, very close to the one predicted in 222 Th, where a sharp transition to a reflection-symmetric shape is expected.

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Levels inTh223populated byαdecay ofU227

Cited by 13 publications

References 13 publications

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

How to extend the chart of nuclides?

Backbending in the pear-shaped Th90223 nucleus: Evidence of a high-spin octupole to quadrupole shape transition in the actinides

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